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Oppo BDP-93 & BDP-95 On the Bench

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Using the industry's most advanced HDMI Audio Analyzer, the Audio Precision APx585, we proceeded to measure all of the various aspects of audio performance for both the Oppo BDP-93 and BDP-95 players via the HDMI and analog audio outputs.

HDMI Digital Audio Tests

Setting the BDP-93 and BDP-95 players to LPCM so that the Audio Precision APx585 could analyze the integrity of the HDMI transmission from both players, we measured frequency response and distortion.

BDP-93 HDMI Freq  BDP-95 HDMI Freq

Oppo BDP-93 (left image) & BDP-95 (right image) HDMI Frequency Response

We ran both 192kHz/24 bit 6 channel and 96kHz/ 24 bit 8 channel Dolby TrueHD signals into both players and both produced similarly ruler flat frequency performance from 20Hz all the way up to the Audio Precision test gear bandwidth limitation (80kHz). 

We also ran Bit Error Rate (BER) tests on both players using Dolby TrueHD and DTS HD test signals and both players produced a 0% BER which means both players delivered audio via HDMI 100% error free.  Early HDMI products (ver 1.0 to 1.2) reportedly suffered from jitter related issues but HDMI ver 1.3 and above has completely eliminated jitter related issues thus ensuring bit for bit exact signal transfer from the player to the A/V receiver or processor. 

Editorial Note on BER Testing

A BER of 0% is essential for all bitstreams (ie. DD, DTS, TrueHD, etc) to pass through the player to the AVR for proper decoding.  The same doesn’t apply for PCM data however as many players often upsample 44kHz, 16bit audio you get from a CD and thus alters the original data played from the disc.  This usually results in failed BER tests but not necessarily bad audio performance.  It’s important to check other aspects of the signal such as frequency response and THD after the digital to analog conversion stage to get a clearer picture of what is going on.

BDP-93 HDMI Dist  BDP-95 Dist

Oppo BDP-93 (left image) & BDP-95 (right image) HDMI Distortion vs Frequency 

We measured distortion on both players HDMI outputs using a 0dBFS 96kHz / 24 bit Dolby TrueHD test signal. Both players measured identical producing distortion #s near the noise floor of our test equipment.  Consumers strictly pulling audio off these players via HDMI won't find any performance differences between the two models. 

 

Analog Output Tests

For those rare users considering buying one of these Oppo Blu-ray players that don’t yet have an HDMI 1.3 or higher AVR capable of decoding the latest surround formats, we tested the analogue outputs of the BDP-93 and BDP-95 to see how they performed. In the cases were measurements are identical between players, we only show results of one player in the interest of keeping this test report short and concise.

BDP93 TrueHD Freq

Oppo BDP-93 / BDP-95 Analog Frequency Response

 With all speakers set to "large" we used a 0dBFS Dolby TrueHD 96kHz/ 24 bit 8 channel test signal to measure frequency response which was ruler flat from 20Hz all the way to the Nyquist frequency (1/2 sampling rate 44kHz).  

BDP93 Dist  BDP95 Dist

Oppo BDP-93 (left pic) and BDP-95 (right pic) Distortion vs Frequency

With all speakers set to "large" we used a 0dBFS 96kHz/ 24 bit 8 channel PCM test signal to measure distortion vs frequency response which was commendably low on both players.  CH7 is the subwoofer channel which measured slightly higher distortion on both players compared to the seven main channels.  The BDP-93 THD+N was measured to be 0.003% THD+N rising up to 0.01% at 44kHz.  The Oppo BDP-95 in comparison was ruler flat at 0.0015% THD+N all the way up to 44kHz. 

Repeating these tests using a -20dBFS 96KHz/24 bit 8 channel Dolby TrueHD test signal, the Oppo BDP-93 measured ruler flat distortion of 0.03% for all seven main channels and 0.05% for the subwoofer channel while the BDP-95 measured 0.01% THD+N for the seven main channels and 0.02% THD+N for the subwoofer channel.

Yes there were slight measurable differences between the players with respect to distortion, but it's very unlikely there would be a situation where these differences would be audible. 

We weren’t able to measure a difference in distortion between the unbalanced and balanced analog stereo outputs of the BDP-95 because the measured results were so low that they were again approaching the noise floor of our test equipment.  It's important to note that the analog circuits for the dedicated stereo output are very similar to the standard FL/FR outputs for the BDP-95 except for the lower I/V converter resistor values (lower noise floor) due to the stacking of 4 DAC channels.  The balanced outputs are also 6dB hotter than the unbalanced.

 BDP93 Xtalk  BDP95 Xtalk

Oppo BDP-93 (left) and BDP-95 (right) Channel to Channel Crosstalk

Using a -20dBFS 192kHz / 24 bit Dolby TrueHD test signal, we measured channel to channel crosstalk at 10kHz with all channels set to large and 0dB.  The Oppo BDP-93 produced excellent results (>100dB) which is better than you get with most high end preamps let alone Blu-ray players.  The BDP-95 defied all logic and produced #'s to the measurable limits of our test gear.  The audible differences with regards to crosstalk between these two players would be like trying to compare the loudness of a gnat's fart in loud New York City traffic if one listener was sitting in Florida and the other in Australia.

 

Bass Management

Setting all speakers to "small" and selecting 80Hz as our choice crossover point, we measured the analogue bass management capabilities of both players.  Unlike the Oppo BDP-83 model with a fixed 80Hz crossover point, the newer BDP-93/95 models offer variable crossover settings from 40-250Hz (20Hz increments from 40Hz to 80Hz, 10Hz increments from 80Hz to 120Hz, 50Hz increments from 150Hz to 250Hz). 

BMGMT Xover  BGMT SPK

Oppo BDP-93 & BPD-95 Analog Bass Management System 

 

BDP95 Bass MGMT

Oppo BDP-93 & BPD-95 Analog Bass Management Measurements

 

We measured the filter slopes using a -20dBFS 96kHz / 24 bit PCM test signal.  Setting the crossover to 80Hz, we in fact measured an 80Hz -3dB point for the HPF and LPF with a 12dB/octave slope.  We personally prefer to see a 24dB/octave slope for the LPF like THX recommends, but Oppo said their goal was to meet the minimum Dolby requirement of at least a 1st order filter (6dB/octave) for the HPF and at least a 2nd order filter (12dB/octave) for the LPF.  Considering THX informed us they don't even test the analogue outputs of Blu-ray players, we are just picking nits here.

 

Wrap-Up

Oppo proved that they can build a better mouse trap with their new BDP-9x series of Blu-ray players.  From analog audio standpoint, the BDP-93 & BDP-95 measure better than the venerable BDP-83 in every scenario we tested.  The BDP-93 displayed benchmark performance while the BDP-95 exceeded that mark to the point where we were measuring the limits of our $40k Audio Precision HDMI analyzer.  Anyone considering buying one of these new players with aftermarket modifications should instead save their hard earned dollars or put it to better use purchasing more Blu-ray discs to enjoy on these wonderful machines.  The BDP-93 and BDP-95 Blu-ray players are everything so many other so called "high end" players wish they could be and much more.  Both players have a high end appearance to them while the BDP-95 takes it up one notch by backlighting many of the buttons of the front panel face plate.  Consumers may ask the question "Is the BDP-95 worth 2X the cost of the BDP-93?"  We think it's more appropriate to ask are $2k Blu-ray players worth 4X the cost of the BDP-93?  We certainly haven't run across any higher priced players that can better the overall performance of the BDP-93, let alone the BDP-95.  For those utilizing HDMI outputs only, get the BDP-93. In our opinion, analogue buffs won't be able to find a better value than the BDP-95 both as a Blu-ray player and a dedicated CD player. 

 

For more information, visit Oppo Digital

Also, check out our Full Oppo BDP-93 Review

 


 

 




 

 

 

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Recent Forum Posts:

MarkLksClassica posts on July 18, 2012 14:30
Oppo BDP-95 vs. Cambridge Azur 651C

Any thoughts on the superior audio of these two players?
djreef posts on March 24, 2012 19:51
Having come from a Denon DVD-3930ci as a source component, I'd be remiss to say I could hear a difference, though I think I can from a sq standpoint ;O. What sold me on the BDP-95 was the flexibilty of the unit, and the fact that I could finally ditch another link in the chain - my pre-amp.

DJ
PENG posts on March 24, 2012 17:00
Ronbro, post: 874427
I'm sure glad this web site is here…I have an older B stock Marantz SACD player that just doesn't seem to give me what I am wanting…a heck of allot more audio refinement.
I have an Integra receiver , Axiom M80 speakers & mostly Blue Jeans cables front to back w/ the exception of a Synergistic Research Coax Digital out from the Marantz….any other ideas or thoughts for improvement?
Thanx

May be the Marantz player is not the weakest link of your system. Also, the quality of the recording is often more important than the format. Try playing some know high quality discs and see if you get the results you are looking for. Again, it does not always have to be SACD or DVDA, a HQ CD could sound better than an average SACD.
Ronbro posts on March 24, 2012 13:02
Blue Ray Players

I'm sure glad this web site is here…I have an older B stock Marantz SACD player that just doesn't seem to give me what I am wanting…a heck of allot more audio refinement.
I have an Integra receiver , Axiom M80 speakers & mostly Blue Jeans cables front to back w/ the exception of a Synergistic Research Coax Digital out from the Marantz….any other ideas or thoughts for improvement?
Thanx
Rose75 posts on March 19, 2012 04:17
How quiet is the transport, can it be heard from say a couple of feet away?
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