SVS PB-1000 Pro and SB-1000 Pro Subwoofers Review

SVS 1000-Pro Series Subwoofers Introduction

SVS’s growth from a small company to a large and well-known audio manufacturer over the years has been pretty astounding to see for audio enthusiasts. It is all the more remarkable given that the segment of the industry that it operates in has been in a gradual decline for a while now. As much as it is painful to see for audiophiles, the traditional speaker templates of bookshelf speakers, floor-standing speakers, and subwoofers are losing market share as the audio systems of choice in homes in favor of soundbars and Bluetooth speakers. In the midst of this decline, SVS has grown from a small company to a global business with vendors on every continent except Antarctica. One way they have achieved this market dominance is to have something for nearly everyone as well as constantly improving their offerings to push technology and performance forward. SVS has recently made just such an improvement with their most affordable subwoofer line, which is now called the 1000 Pro series.

The 1000 Pro subwoofers is a major product revision for SVS since it makes such a significant change in what is likely to be a point of entry for people getting into SVS products. For many people, the 1000 Pros are going to the first subwoofer for those who aspire to own an SVS subwoofer, so it is important to make a good impression. The question then becomes, just how good are the 1000 Pro subwoofers? That’s what we will attempt to answer in today’s review since we have the SB-1000 Pro and PB-1000 Pro in-house. What do these subs bring to the table at their respective price points? Let’s now dig in to find out…

SVS 1000 Pro Series Subwoofers YouTube Overview

Appearance

Both of the SVS 1000 Pro subs arrived well-packed, with thick polyethylene foam blocks sandwiching the subs to protect them from bumps and shocks. They were covered with a soft fabric bag to prevent scuffs and scratches and outside of that, a plastic back to protect them from moisture. This is the kind of packing one would hope for with subs in this price range, and they should be able to endure the usual turbulence of parcel shipping without a problem.

Once out of the packing, the PB-1000 Pro looks fine for a sub of its price point. It isn’t a beautiful sub, but it doesn’t look at all bad for the cost. The black ash veneer has a bit more character than the textured matte black that is often seen in this class. The rounded edges go a long way towards making it living-room friendly instead of just a purely functional item. The grille, which is just a black-fabric wrapped frame, also goes a long way towards making it inconspicuous. It isn’t a huge sub (by my admittedly skewed standards), so it shouldn’t stick out that much in any normal domestic space. Without the grille, the driver and ports are exposed, and it looks like a typical sub. Some people don’t mind the appearance of these loudspeaker components, but others do. 

The SB-1000 Pro, on the other hand, is a truly nice-looking piece of audio hardware - at least the gloss black version that I was sent. The standard finish is black ash, much like the PB-1000 Pro, but the SB-1000 Pro can be had in both gloss black and gloss white at a $100 surcharge. It is a true gloss paint finish and not a plasticky gloss. In my opinion, it is worth the extra cost and maybe one of the slickest-looking subs in its price range. Other household occupants are unlikely to object to a gloss SB-1000 Pro, not just because of its attractive finish but also because of its diminutive size, and if they won’t tolerate the presence of a gloss SB-1000 Pro, they wouldn’t tolerate the presence of any subwoofer. One thing I wish SVS would do for their gloss finished subwoofers is to use magnetically attached grilles in order to give the front baffles that much cleaner of a look, but the grille guides are minor blemishes on what is otherwise a very pretty and petite subwoofer. 

Design Analysis

While the design changes for these subs are major overhaul with respect to the previous 1000 series subwoofers, they are not unexpected, given the evolution that had been occurring in the higher-end series, more specifically the 2000 Pro and 3000 series. In fact, the PB-1000 Pro resembles a smaller version of the PB-2000 Pro, which itself resembles a smaller version of the PB-3000. There is not much left of the original PB-1000 in the PB-1000 Pro, but there is much of the design from the PB-2000 Pro and PB-3000 in there. Much of the same is true for the SB-1000 Pro, although it doesn’t seem to have gone through as radical a redesign as the PB-1000 Pro.

Putting aside comparisons to SVS’s other subs, what is the design of the 1000 Pro subs like on their own? Let’s begin that discussion by talking about the driver which is always the most interesting component of subwoofers for me. Both the PB-1000 Pro and the SB-1000 Pro use 12” drivers, but they are not the same. The PB-1000 Pro uses a more massive motor, and that extra strength is needed since, as a ported subwoofer, it is tasked with controlling the air mass behind it as well as its own cone and moving parts. On the other hand, the SB-1000 Pro has a slightly longer Xmax (SVS states a 13.3mm Xmax) since air displacement counts for more in a sealed subwoofer. There are also differences in the suspension system that are optimized for the sealed or ported designs. Much of the rest is the same between these two subs. The cone is made from a lightweight treated fiber composite, and it is attached to a stamped steel frame by a nitrile rubber surround. The surround was one notable point of improvement of the SB-1000 Pro over the SB-1000 and has been refined to enable higher excursions. The spider is made from a cotton-polyester blend and connects a 1.5” diameter former and voice coil to the motor. The motor uses a double stack of magnets that add up to a 1 ¼” thickness and a 5” diameter with a bumped back-plate for more excursion room for the voice-coil former. On the whole, the driver is about what would be expected in a good subwoofer in this price range, neither particularly heavy-duty nor especially lightweight. Much of the aspects of the driver that matter most aren’t visible from the exterior and some of those properties are things like optimizing magnetic fields, induction control, suspension components balanced for both directions of travel, thermal dispersion, and other hidden attributes. SVS’s engineering has always been good in these respects, so I expect that this driver will be heavily optimized much like their other subwoofers. This is very commendable design practice at a “budget” price point. Well done.

The amplifier uses SVS’s class-D amps that they call the ‘Sledge’ amps, but the new ones used in the 1000-Pros are much different than the outgoing amps. These newer amplifiers use 34-amp 120-volt MOSFETs to deliver power instead of the typical op-amps. Power output has increased to 325-watts RMS from the older 1000’s, but that extra 25-watts is going to make far less of a difference than the changes to the topology of the amp which can not be boiled down to a single number. Signal processing has been improved and is now done with an Analog Devices Audio 50MHz DSP that has 56-bit filtering. Amplifier plate controls have been changed and now use SVS’s “ICI” (Intelligent Control Interface) which is basically a meter that can be switched to indicate volume, phase, and low-pass filter settings, although that seems to be the extent of the onboard controls. It is an elegant solution and doesn’t take as much room as knobs and switches (to be honest, I still kind of prefer the tangibility of knobs and switches). For deeper control over the sub, the 1000 Pro subs can be controlled by SVS’s Subwoofer Control App, which is compatible with Android, iOS, and Amazon operating systems. The amp has a USB port to power SVS’s Wireless Audio Adapter to reduce cable clutter. One odd feature is the 1000 Pro’s support for speaker-level connectivity; I doubt that many people would be using these subs with that type of input, but it is not an unwelcome feature.

SVS’s Subwoofer Control App enables the user to control the sub with an extremely fine degree of precision. With SVS’s Subwoofer Control App, the user can control the volume down to a single dB of precision, low-pass filter behavior from 30 Hz to 200 Hz down to individual hertz frequency precision, and also with a choice of slopes of 6, 12, 18, and 24 dB/ octave, phase control from 0° to 180° selectable down to individual degrees (or you can just flip the polarity from positive to negative), room gain compensation response curve selectable from 25 Hz, 31 Hz, or 40 Hz with a choice of a 12 or 6 dB/ octave slope (this is very handy for taming low-end boominess for those who get a lot of room gain), and port tuning configurations. One neat thing that is especially easy to use with the SVS app is a 3-band parametric equalizer with which the user can adjust the bass response to their taste. It can also help tame peaks in the response that are produced by room acoustics. These subs do away with the need for an external equalizer to shape the subwoofer’s frequency response.

The cabinets for the 1000 Pro subs are fine for the price class and are intelligently engineered without being overbuilt. Many optimizations in the design of the PB-1000 Pro allowed it to be lighter than the original PB-1000, however, it is still robust enough that it should remain fairly inert in use. Cabinet material is MDF, of course, and the front baffle is about 1” thick. There is a window brace at the midsection of the PB-1000 Pro as well as some wood corner braces to help strengthen the edges. Each cabinet has a generous amount of stuffing lining the top, bottom, and side panels to help damp internal pressure waves as well as assist in isothermal conversion that makes the interior behave a bit larger than it actually is. The ports for the PB-1000 Pro are surprisingly long; there are two 2.5” diameter ports that I measured to have a 15” depth and then a right turn for another 14” in height. The length versus the diameter for these ports suggests a very deep tuning frequency, so this subwoofer should dig to pretty deep frequencies. The PB-1000 Pro also supports a sealed operating mode and comes with port plugs, but that would be a waste of headroom with this sub. If you want to lessen the low-end response, a better way to do that is through the room gain compensation control on their app. The cabinet feet are some wide cones that are covered with some soft rubbery material so they shouldn’t scratch hard floor surfaces.

Overall, the designs for the 1000 Pro series look like a sensible balance of resources for subwoofers of this price range. They look like they could produce some real output for their size and price; but can they? Let’s now find out by listening to some content to hear what they can do...

Listening Sessions

The best placement for a single sub in my room gives me a relatively flat response for an un-EQ’d single subwoofer, with a window of +/- 4 dB from 25 Hz to 100 Hz with no broad dips in important ranges (in this instance, both subs were placed next to each other in the “good spot” of the room). This location trades low-end room gain for a relatively flat response, a worthwhile trade for my tastes. The receiver used was a Pioneer Elite SC-55 and the crossover was mostly used at 80 Hz. As always, I will note here that since room acoustics have a huge effect on low frequencies, the way these subwoofers sound in my room at my listening position is not necessarily going to be the way they sound anywhere else for anyone else, so readers would do well to keep that in mind, and not just for this subwoofer in this review but for any subwoofer in any review.

Music Listening

I always start my music listening reviews of subwoofers with pipe organ music because it is an acoustic instrument that stresses subs like no other on the planet. For the SVS 1000 Pro series subs, I found a recent hi-res 24-bit/176kHz release from Reference Recordings on Qobuz titled ‘The Orchestral Organ.’ This album is comprised of transcriptions of a variety of orchestral compositions for the pipe organ. It isn’t a very simple task to condense a composition intended for a full orchestra down to something that a single instrument can play, even an instrument with the range and depth of the pipe organ. However, as pipe organs became more sophisticated and versatile in the late nineteenth and early twentieth century, they were more able to tackle the complexity of orchestral music, and so organists set about to transcribe orchestral pieces to perform for audiences since organ performances were much more accessible for ordinary people than orchestral performances. A number of the pieces in this album hit and sustain some fairly deep frequencies courtesy of the Julia Irene Kaufmann Casavant organ that has some 32’ pipes capable of 16Hz notes. To be sure, this album isn’t chocked full of massive deep bass, but on the occasions that it does it, the lower registers from those pipes can sound like a wall of sound that will shake the dust off of any speaker system.

Starting off with the PB-1000 Pro, the pipe organ sounded powerful when it hit the deep notes; indeed, it rattled my drop ceiling. It doesn’t take a lot of SPL to do that as resonant frequencies can be excited with relatively little energy, but it does take serious extension. I could feel the lowest notes undulating my sofa. However, the PB-1000 Pro could do more than just rumble my room with deep bass; it had an authoritative sound that could produce powerful bass at any bass frequency. The lower registers did not seem to stress it in any audible way either; it was clean and controlled at every level. Switching to the SB-1000 Pro, it was capable to a point, but there was clearly a limit to its deep bass prowess versus the PB-1000 Pro. It wasn’t stressing itself to play the deepest notes, it simply played them at a much lower level which is for the best given its design. I didn’t expect that it could keep up with the PB-1000 Pro in the deeper bass. But this isn’t to say the SB-1000 Pro reproduced this music badly; most of the pipe organ’s low-frequency range is well within its ability and there were moments where it surprised me. However, that lowest octave does make a difference with this kind of music, and the PB-1000 Pro had a significant advantage there. ‘The Orchestral Organ’ was an enjoyable listen on both subs, but between them, the PB-1000 Pro is the subwoofer that organ music lovers will want.

I listened to a very different type of acoustic music with lots of lower bass in ‘Vital Tech Tones,’ which is a 1998 fusion jazz album performed by a supergroup of the same name with members Steve Smith, Victor Wootan, and Scott Henderson. This energetic music has lots of agile bass guitar play from the master bassist Wootan who is better known as a member of Bela Fleck and the Flecktones. Subwoofers also get a lot of work to do from Steve Smith’s array of bass drums. The fast attacks of the bass guitar plucks and percussion strikes in this album make it a great demonstration of the transient behavior of the low-frequency performance of any audio system. The recording is very clean and is fun to listen to at loud levels for its wide dynamic range and punchy bass and percussion.

I started with the SB-1000 Pro on ‘Vital Tech Tones,’ and the album opened with a bang as a bass drum strike is the first thing heard. The SB-1000 Pro managed a nice thump for the bass drum, and every hit was felt as well as heard. The fundamentals of the bass guitar playing were given a meaty, tangible presence by the SB-1000 Pro, and Wootan’s deft playing was captured nicely. All of the bass guitar plucks, frets, and slides had good definition and immediate attacks. String mutes were also immediate, and I didn’t sense any overhang or lingering decay. Switching to the PB-1000 Pro made a difference, but a subtler one for this music. The bass drums seemed to have a bit more grunt, but that was the only difference I could detect, and it may have had more to do with the slightly different placements of the subwoofers than their intrinsic performance difference. The PB-1000 Pro was as adept at delineating Wootan’s marvelous bass guitar playing as the SB-1000 Pro. Going back and forth between the subs didn’t change the sound much, and from this, I surmised that within the frequency range of this music, they were on a fairly even footing. This music doesn’t dig quite deep enough to expose the most substantial differences between them. Switching between these subwoofers was also a good rebuke to the idea that sealed subs are somehow “faster” than ported. I’d love to see anyone try to tell the difference in a blind test when port output is not a factor. 

Another form of music that I think can make good use of a subwoofer is dark ambient, and for this, I found a bass-heavy album titled ‘De Profundis’ by an artist called Nebel. ‘De Profundis’ is made available from the Belgian-based dark ambient label Kopp which releases all of their music freely at Archive.org under creative commons licenses. ‘De Profundis’ is pretty heavy stuff, and, even among dark ambient recordings, is quite gloomy. The tracks on it are more like carefully sculpted soundscapes rather than traditional music compositions, and they create an atmosphere of foreboding and dread. Reverberant alarms, synthetic strings, distant chants, wailing of the damned, and a variety of other eerie sounds come together for music that could serve well as a soundtrack for descending the various levels of hell. There are a lot of low-frequency noises to keep subwoofers busy such as cavernous drones, the rolling rumble of thunder, and menacing mechanical hums. These deep bass sounds are mostly recessed in the background but at times they can be aggressive, and they are always present to some degree in this album. If that sounds like it floats your boat, ‘De Profundis’ is available in a high-quality MP3.

Both the SB-1000 Pro and PB-1000 Pro gave a good showing in the low frequencies of ‘De Profundis.’ They were both able to reproduce the richly textured bass of the album with ease. ‘De Profundis’ was given a solid foundation by either sub, and their inclusion transformed the album into a vivid soundscape in my living room instead of just a recorded sound played back on my system. The PB-1000 Pro did offer the sound a bit more ‘weight’ than the SB-1000 Pro, but it was not a huge difference. The SB-1000 Pro kept up remarkably well considering its size disadvantage, and it could plumb most of the depths of this album. The title of the album is quite apt for a review of such capable subs since ‘De Profundis’ is Latin for “out of the depths.”  For ambient music, ‘De Profundis’ is a rather harrowing listen, but for those who take the plunge, the SVS 1000 Pro subs are very much up to the task of giving the album a deep end in which to dive.  

Getting back to some high-energy music, I threw in something that could push the subs hard at high levels. Not many genres of music are as hard on subs as drum’n’bass, and from that genre, I picked ‘Sun Tracker’ by Posij. This album came out late last year on Vision Recordings and has a futuristic sound that isn’t on the harder side of drum’n’bass but isn’t at all mellow listening either. It features intricate rhythms, creative use of bass lines, and interesting new melodies, compositions, and synth sounds. It is progressive electronic music in that it shows a possible forward direction where electronic music could go - and hopefully will go. Low-frequency content is brazen and plentiful in ‘Sun Tracker,’ and if you want to test the limits of your sub, it’s a fine album to crank loud to see what your subwoofer can and can’t do: a perfect test album for the SB-1000 Pro and PB-1000 Pro.

I cranked the volume and switched back and forth between the subs during the tracks to see what they could do and how they compared. I found that both subs could thump nicely, and I was surprised by their output capability. I did find their limits, but that was at a rather high level that I don’t normally listen at. When pushed, the PB-1000 Pro seemed to have a bit more punch than the SB-1000 Pro even though this was a level-matched comparison, and I think it was more than just the extra extension of the ports at work. It could possibly be due to the difference in placement; sometimes even small changes in subwoofer placement can lead to significant differences in the in-room response. Again the difference wasn’t massive, but the PB-1000 Pro clearly had more grunt. It could vibrate my sofa in a way that the SB-1000 Pro could not match. Nonetheless, the SB-1000 Pro put up a great showing and provided some real thump along with a palpable buzz during the bass lines. The amount of bass that SVS managed to get out of this 13” cube was impressive. Both subs proved to be adept at bass-heavy electronic music, but the PB-1000 Pro is the one to get if floor space isn’t a concern.

Movie Watching

One recent release that I just knew would be a bass fest is Zach Snyder’s ‘Justice League.’ Scared off by poor reviews, I declined to see the original, but maybe this version rectified some of the problems that the original had. I had seen Snyder’s other DC movies which were bombastic, to say the least, so this unfiltered Snyder movie was sure to be a humdinger as far as low-frequency effects go. I had the sound cranked up pretty loud, and by the end of this four-hour film, I was bruised and battered. The 1000 Pro subs acquitted themselves well. The SB-1000 Pro produced a healthy amount of bass, but the PB-1000 Pro gave all of the mayhem a deeper thunder that added a more epic feel to the spectacle. I was switching between the subs during the first couple of action scenes, but after I thought I had a feel for the differences, I just left the PB-1000 Pro on since it was doing a bit more justice to the sound mix. The SB-1000 Pro did an admirable job, but the PB-1000 Pro was built for this sort of work. The action often dipped into infrasonic bass, and the PB-1000 Pro drove it with a resounding rumble that I could feel. I couldn’t help to be impressed by what SVS could bring to the experience for $600. For those who enjoy these kinds of movies, the extra space and cost of SVS’s ported subwoofers are well worth the expense. I could have enjoyed this movie with either sub, but the PB-1000 Pro more fully captures the experience.

For something a little bit more down to Earth, I took an opportunity to see ‘Hacksaw Ridge,’ Mel Gibson’s WW2 epic about a soldier who earned the Congressional Medal of Honer even though he was an avowed pacifist. I had not seen this movie previously, but I found the subject matter to be interesting coming from Gibson who did not strike me as the type to venerate pacifism. Nonetheless, this was a WW2 movie that took place in Okinawa which was a notoriously brutal battle, and so lots of low-frequency effect sound was assured. Watching the movie, both subs delivered the goods, but, as I had heard from other content, the PB-1000 Pro has significantly more oomph than the SB-1000 Pro. That is not a surprise, but the SB-1000 Pro still had enough force to have a visceral impact during the battle scenes. I switched between subs in key battle scenes, and the explosions still had punch even from such a diminutive subwoofer. The PB-1000 Pro had an earth-shaking, guttural quality that eluded the SB-1000 Pro and which gave it a heightened realism. ‘Hacksaw Ridge’ was an enormously violent film (strangely so for a movie about pacifism), and the SVS 1000 Pro subs could render the intensity of battle with an appropriate fierceness. If you aren’t able to accommodate a subwoofer the size of the PB-1000 Pro, the SB-1000 Pro can still deliver a lively experience that will more than suffice to get across the essence of the scenes, but the PB-1000 Pro does make for a more lifelike experience.

SVS PB-1000 Pro and SB-1000 Pro Subwoofers Conclusion

The SVS PB-1000 Pro and SB-1000 Pro were tested using ground plane measurements with the microphone at a 2-meter distance in an open setting with well over 100 feet from the nearest large structure. The subs were tested with woofer facing the microphone. The temperature was recorded at 65F degrees with 39% humidity. The subwoofers’ gain was set to maximum, phase was set to 0, and the low pass filters were left off.

The above graphs show the measured frequency responses for the PB-1000 Pro and SB-1000 Pro subwoofers. Both subs have a fairly flat response, but we do see a slight rise above 50Hz that affects the SB-1000 Pro in particular. The PB-1000 Pro is pretty much flat down to 20Hz and the SB-1000 Pro extends flat down to 25Hz. The SB-1000 Pro has a response shaped by DSP EQing since sealed subwoofers normally roll-off at a higher frequency and a more gradual slope. Both subs exhibit a strong response out to 200Hz which is something I always like to see. That means these subs can be crossed over to smaller speakers with no gap in the response, and higher crossover frequencies can also be advantageous in multi-subwoofer systems for a smoother response and more bass headroom where localization is less of a concern.

The above CEA-2010 measurements are short-term bursts that show the subwoofer’s clean peak SPL before heavy distortion sets in. Our measurements have been referenced to 2-meter RMS, which is 9 dB down from the standard requirement for the measurements to be shown at 1-meter peak. However most publicly available CEA-2010 measurements are shown at 2-meter RMS, so we followed that convention. The measured performance from both the SB-1000 Pro and PB-1000 Pro are superb for their price. In fact, the PB-1000 Pro matches the PB-2000 Pro for mid-bass output at 50Hz and above. It looks to be a big jump in performance over both the original 1000 series as well as the original 2000 series for that matter (except at 25Hz and below). The SB-1000 Pro’s performance is very good considering its size; 101dB at 31Hz is nothing to sneeze at, especially for such a tiny sub. However, the enclosure size and ports of its larger sibling put it at a very serious disadvantage for deep bass headroom. At 20 to 25Hz, the PB-1000 Pro has about a 12dB advantage over the SB-1000 Pro, which is about four times the headroom. On this point, it should be mentioned here that SVS reports that these measurements correlate very closely with their own, except for the SB-1000 Pro specifically at 20Hz and 25Hz where they measure almost 2dB more than what I was able to capture. Either way, the SB-1000 Pro is not a sub I would get for big output down in that range. It runs out of steam fairly quickly in deep bass, but that would be expected from a small sealed sub. Its mid-bass headroom is very good though, and it has plenty of headroom for almost any bass in the range of acoustic music recordings.

Testing for long-term output compression was done by first conducting a 20-second sweep tone where 50 Hz hit 90 dB with the subwoofer 2 meters from the microphone. We then conduct further 20-second sweeps by raising the gain by 5 dB until no more output could be wrung out of the subwoofer. These tests show us the long-term continuous headroom that the subwoofer is capable of. Again we see very good mid-bass headroom from both the SB-1000 Pro and PB-1000 Pro, with the PB-1000 Pro nearly touching 110dB at 80Hz and the SB-1000 Pro surpassing 105dB from 50Hz to 90Hz. This is the range for a lot of bass drum percussion so these subs should have a nice punch for that instrument. One thing that is interesting to note is that the PB-1000 Pro seems to have a considerable advantage in upper bass as well as deep bass versus the SB-1000 Pro. I would have expected a deep bass advantage, but the PB-1000 Pro has a very significant headroom gain above 100Hz over its sealed sibling. At the highest sweep of the PB-1000 Pro, we do see some hiccups in the response, and that would be the attack and release of the limiter kicking in to restrain the subwoofer from beating itself to death. Aside from the extra headroom of the PB-1000 Pro in upper bass, these measurements are about what would be expected and are a very good showing from SVS, especially in this price class.

The above graphs show the corresponding total harmonic distortion to the long-term output graphs. Essentially, they depict how linear the subwoofer remains for the corresponding drive level seen in the long-term sweeps. The quantity being measured is how much of the subwoofer’s output is distortion and is shown here as a percentage. The measured performance here is fine, although SVS subs that I have tested in the past tended to have less distortion than what either of these subs could be pushed to. At nominal drive levels, distortion is very good and stays well below 5% above 20Hz on the PB-1000 Pro and 40Hz on the SB-1000 Pro. However, both subs can be pushed into pretty significant quantities of distortion at high drive levels. One interesting feature is that while the PB-1000 Pro has quite a bit more headroom than the SB-1000 Pro, it pays for that headroom with higher distortion levels. This leads me to guess that perhaps the upper bass headroom on the SB-1000 Pro may have been deliberately reduced to give it a cleaner sound for music, whereas the PB-1000 Pro was allowed as much output as could be had since it was more likely to used for film content where harmonic distortion isn’t as likely to be noticed in effects scenes such as explosions and earthquakes. The SB-1000 Pro can be pushed into a hefty level of distortion at lower frequencies, and that is expected since the entire onus of air displacement rests on a 12” driver with 13mm of Xmax, and that will reach its limits relatively early in deep bass below 30Hz.

These graphs neatly illustrate the difference - and advantage- of the heavier-duty driver in the PB-2000 Pro. For those who were thinking, “why get a 2000 Pro for mid-bass content when the 1000 Pros can get just as loud?” Well, here is your answer. The PB-2000 Pro can’t be pushed that far past 5% THD above 20Hz even at the absolute maximum drive level. The PB-1000 Pro, on the other hand, can be pushed past 20% THD in midbass frequencies. The PB-1000 Pro can get as loud as the PB-2000 Pro in mid-bass frequencies, but it isn’t as well behaved for the same loudness levels.

Group delay is the measurement of how much time it takes for individual frequency bands of an input signal to be produced by the speaker. It can indicate that some frequency components are developing slower than others or are taking longer to decay. It is generally thought that 1.5 sound cycles are needed for group delay to be audible at bass frequencies, although there is an argument that group delay should remain under 20 ms to be completely unnoticeable, but that is likely meant for mid and upper bass frequencies. Both the SB-1000 Pro and PB-1000 Pro keep very low group delay where it matters, in the mid-bass frequencies. The protective filters, as well as the PB-1000 Pro’s port, do hike group delay up by quite a bit below 40Hz, but those are such deep frequencies that the audible consequences are negligible. Human hearing is just not very sensitive at deep bass, but it is very sensitive to upper bass, and there are no serious time-domain problems where it could be of consequence. One interesting aspect seen here is the remarkable similarity between the measurements up to just above 20 Hz, even with the many differences between these subs. This is overall a good showing, and anyone concerned about the “quickness” of these subs really doesn’t need to be.

For those who are curious, here is the response difference that occurs when you seal the ports of the PB-1000 Pro and set it to the ‘Sealed’ operating mode in the SVS app. With the inclusion of the ‘Room Gain Compensation’ EQ settings in the app, there isn’t really a good reason to use this sub in a sealed operating mode, ever. If you are getting too much room gain that is blowing up the low-end of the response, use the Room Gain Compensation settings to change the low end. Sealing the ports does taper off the low-end a bit but robs the user of headroom in doing so; the Room Gain Compensation settings temper the low end without the headroom penalty.

The above graphs depict the changes on the response that can be made by the Room Gain Compensation settings. Smaller rooms can boost deep bass substantially thereby making it sound ‘tubby.’ If you don’t like the low-end boost that can be caused by room gain, SVS has provided these simple settings that should do the trick in taking down deep bass without having to tinker around in the PEQ to get the same result.

Conclusion

I didn’t have an opportunity to review the original 1000 series, but I have to think that the 1000 Pros are a major improvement. The entire restructuring of the subwoofers that SVS started with the 16-Ultra series and took another turn in the 3000 series has been moving the overall performance up compared to preceding subs, and the ground-up redesign of the PB-1000 to become the PB-1000 Pro brings an enormous performance increase. SVS tells me that mid-bass sees more than 3dB headroom gain versus the original PB-1000, as well as gains in extension and output in lower frequencies as well. SVS has kicked its entry-level subs up by more than just one notch.

Before bringing this review to a close, let’s briefly go over the strengths and weaknesses of the products under review, and, as always, let’s start with the weaknesses. It’s hard to come up with a list of weaknesses of these subs because there aren’t many, and what few that they have are hairsplitting when the price is considered. The only gripe I can think of is that the distortion levels for both subs just aren’t as good as what I am accustomed to from SVS subs, but this comes more from SVS having spoiled me in the past than a reasonable critique of a $600 sub. The fact is that their distortion profile is in line with many other subwoofers of their price range, so it is not like it’s below average and is therefore not really a fair criticism. Another criticism that might be leveled is that the SB-1000 Pro doesn’t really deliver powerful deep bass, but it would be absurd to expect massive deep bass from a 13” cube, and a $500 ( delivered to your door) one at that. In fact, given the size and cost, it is a surprisingly capable subwoofer, and that brings us to the strengths of the 1000 Pro series subwoofers.

The chief strength of the 1000 Pro series is their performance for the price. For six-hundred smackers, you can get very punchy mid-bass, flat frequency response, as well as an honest-to-goodness extension down to 20Hz. The SB-1000 Pro sacrifices quite a bit of that deep bass output, but still leaves some on the table plus an abundance of mid-bass, and all in a very nice-looking 13” cube, again, for five to six hundred dollars. For output per cubic inch per dollar, I don’t know that anyone is challenging the SB-1000 Pro, except perhaps SVS’s own recently launched 3000 Micro. Both the PB-1000 Pro and SB-1000 Pro provide an astonishing amount of performance for their size. The PB-1000 Pro earns a 'Large Room' Bassaholic rating which indicates that it should be adequate for a room of 3,000 cubic feet to 5,000 cubic feet, and the SB-1000 Pro earns a 'Medium Room' rating, indicating it should be adequate for a room of 1,500 cubic feet to 3,000 cubic feet (read this article to find out more about our Bassaholic Subwoofer Room Size Rating). The smaller sizes of these subs will make them palatable for other household members who might object to larger units. The gloss finishes of the SB-1000 Pro make it all the easier of a pill to swallow for fitting in with nice room decor.

SVS SB-1000 Pro (left pic) ; PB-1000 Pro (right pic)

It’s also worth mentioning that they don’t weigh a lot either, and both are very easy subwoofers to pick up and move around. I think lightweight in a subwoofer is often a greater advantage than many people give it credit for. When you are less discouraged from moving the sub around, you will be more likely to explore in-room placements that can yield a better acoustic result.

SVS offers all of this performance along with their innovative amp interface and app control. Here are some five to six hundred dollars subs with extensive fine-tuning abilities that can be done from your sofa. As was mentioned before, a three-band PEQ alleviates the need to buy an external equalizer to combat room modes; all you need to do is measure the sub in-room to see what frequencies need to be cut.

The price increase of SVS’s entry-level ported sub is greatly exceeded by the performance increases as well as feature additions. Their entry-level sealed sub gets performance gains as well as feature additions with no cost increases. Subwoofer shoppers win in both cases. It is nice to see this behavior from SVS, a business that was already thriving: instead of just coasting on their brand recognition, they decided to invest resources and significantlly improve their products. When you throw in SVS’s 5-year warranty and superlative customer support, they make a very compelling case for subwoofer shoppers in this price range. The PB-1000 Pro and SB-1000 Pro are terrific subs in this price class. Anyone can see for themselves at no risk since, SVS offers a 45-day return window for a full refund including paid return shipping. I doubt that the return window will be used by many shoppers when they experience these subs for themselves.

The Score Card

The scoring below is based on each piece of equipment doing the duty it is designed for. The numbers are weighed heavily with respect to the individual cost of each unit, thus giving a rating roughly equal to:

Performance × Price Factor/Value = Rating

Audioholics.com note: The ratings indicated below are based on subjective listening and objective testing of the product in question. The rating scale is based on performance/value ratio. If you notice better performing products in future reviews that have lower numbers in certain areas, be aware that the value factor is most likely the culprit. Other Audioholics reviewers may rate products solely based on performance, and each reviewer has his/her own system for ratings.

Audioholics Rating Scale

• — Excellent
• — Very Good
• — Good
• — Fair
• — Poor

Metric	Rating
Bass Extension
Bass Accuracy
Build Quality
Fit and Finish
Ergonomics & Usability
Features
Dynamic Range
Performance
Value