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Yamaha RX-A3000 Aventage Measurement and Analysis (Power Tests)

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Power Measurements

Using our Audio Precision APx585 8-channel HDMI analyzer, we conducted a full barrage of multi-channel amplifier tests on Yamaha RX-A3000. We tested power using three methods all of which were taken at < 0.1% THD + N:

  • Continuous Full Power Bandwidth (CFP-BW) - from 20Hz to 20Khz into 8 and 4-ohm loads (up to two-channels)
  • 1kHz Power Sweep vs Distortion (1kHz PSweep) - popularized by the print magazines, this is an instantaneous power vs distortion test at 1kHz. The problem with this test is it often masks slew related and or frequency response problems some amplifiers exhibit at the frequency extremes, and thus inflates the measured power results. It does provide an instant gratification # for consumers to argue over on the forums so we are now incorporating this test to please the masses.
  • Dynamic PWR - 1kHz CEA-2006 Burst Method testing - this is a dynamic power measurement adopted from the car industry similar to IHF method only a bit more difficult for an amplifier and more representative of real musical content.

Keep in mind most review publications don't do continuous fullbandwidth power measurements and they usually publish power measurements into clipping at 1% THD + N or higher. Our measurements are very conservative as we use a dedicated 20A line with no Variac to regulate line voltage.  We constantly monitor the line to ensure it never drops more than 2Vrms from nominal which in our case was 120Vrms. 

For more info on amplifier measurements, see:  The All Channels Driven (ACD) Test

RXA3000-PWR-2CH8ohm.jpg   RXA3000-PWR-2CH4ohm.jpg

Yamaha RX-A3000 1kHz Power Test
Left Pic: ACD, 8 ohms;  Right Pic: 2 Channels driven, 4 ohms

 RXA3000-DynamicPWR-4ohms.jpg

Yamaha RX-A3000 Dynamic Power Test (1kHz) 2CH Driven, 4 ohms

# of CH Test Type Power Load THD + N
2 CFP-BW 155wpc 8-ohms 0.1%
2 CFP-BW 236wpc 4-ohms 0.1%
2 1kHz Psweep 168 wpc 8-ohms 1%
2 1kHz Psweep 251 wpc 4-ohms 1%
7 1kHz Psweep 65 wpc 8-ohms 1%
1 Dynamic PWR 217wpc 8-ohms 1%
1 Dynamic PWR 386wpc 4-ohms 1%
2 Dynamic PWR 205wpc 8-ohms 1%
2 Dynamic PWR 330wpc 4-ohms 1%
7 Dynamic PWR 153 wpc 8-ohms 1%

       Yamaha RX-A3000 Power Measurement Table

 
The Yamaha RX-A3000 handedly exceeded its 140wpc power rating continuously with two channels driven and stomped out an impressive 236wpc both channels driven into 4 ohms; and that’s a full power bandwidth measurement (20Hz to 20kHz at 0.1% THD + N).  It proved to be every bit as powerful as their more expensive RX-Z7 mode.  You can see the protection circuit kick on during our ACD tests, purposely limiting power to 65wpc.  In short time, there is no doubt in my mind forum lurkers seeing this will pop up on our site or AVS Forum bashing Yamaha, not realizing the design purpose of power limiting a multi channel amplifier in a compact chassis, or the reality that real world program material will never trip this limiter circuitry.  Thus we conducted dynamic burst power measurements simulating real world program content.  Interestingly enough the RX-A3000 delivered similar dynamic power output ACD into 8 ohm loads and slightly more power two channels driven into 4 ohm loads than the Emotiva UPA-7 dedicated multi-channel power amplifier that is designed to deliver rated power continuously into all channels as can be seen in the comparison table below.

# of CH Test Type Power Load THD + N
2 CFP-BW 140 watts 8-ohms 0.1%
2 CFP-BW 238 watts 4-ohms 0.1%
7 1kHz Psweep 108 watts 8-ohms 0.1%
7 1kHz Psweep 117 watts 8-ohms 1%
2 1kHz Psweep 240 watts 4-ohms 0.1%
2 1kHz Psweep 252 watts 4-ohms 1%
7 Dynamic PWR 156 watts 8-ohms 1%
2 Dynamic PWR 320 watts 4-ohms 1%

            Emotiva UPA-7 Power Measurement Table

 
It's clear that the Yamaha RX-A3000 delivers more than rated power with up to two channels driven and tons of dynamic headroom (1.9dB for 8 ohms based on their 140wpc power rating).  Let no skeptic tell you otherwise, the RX-A3000 has a darn respectable amplifier section not only for a receiver but for a modestly priced seven channel power amplifier.

 

 

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Recent Forum Posts:

lsiberian posts on October 30, 2014 09:47
chris357, post: 1057661, member: 41595
Cool, i'm feeling better and better about selling that krell amp. I'm actually really glad I found this site.. it's giving me a new perspective about what costs are worth while in this hobby.

dBW are the proper unit for amps, but for marketing reasons they choose to use Watts instead.

I mean no one would buy 31.7 dBW(1500 watts) amp instead a 30 dBW(1000 watts) amp if they listed them that way.
chris357 posts on October 29, 2014 18:17
lsiberian, post: 1057648, member: 37419
It's 21.9 dBW(155watts) vs 23.9 dBW(250watts. That's not even 3 dB. That's not even greater than the tolerance we use for speaker design.


Cool, i'm feeling better and better about selling that krell amp. I'm actually really glad I found this site.. it's giving me a new perspective about what costs are worth while in this hobby.
lsiberian posts on October 29, 2014 16:51
chris357, post: 1057630, member: 41595
I used to have 250wpc, and am just feeling that I'd like to have over kill again.. I probably don't use this to its full advantage as it is.

It's 21.9 dBW(155watts) vs 23.9 dBW(250watts. That's not even 3 dB. That's not even greater than the tolerance we use for speaker design.
chris357 posts on October 29, 2014 11:36
I used to have 250wpc, and am just feeling that I'd like to have over kill again.. I probably don't use this to its full advantage as it is.
Ponzio posts on October 28, 2014 18:04
chris357, post: 1057531, member: 41595
ok, so in 2011 I downsized to one of these and have been pretty happy with it. I was thinking about adding an amp or something until I read this review, so does this receiver still hold up compared to whats out there now? I was thinking of emotiva or something like that(I dont want to spend krell money anymore or even used krell money.) Anyway just fishing right now and any insight is appreciated.
the 3000 is running 155WPC channel, so the power is there. outside of the ESS DAC and the Atmos feature, which is still in it's infancy, what are u looking for? save ur money and enjoy it.
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