Yamaha RX-A6 multichannel performance

[musse22]

Hi, wanting to buy this reciever, but according to audioholics review, Link:

Yamaha RX-A6A 9.2CH 8K AV Receiver Bench Test Results!

We bench tested the Yamaha RX-A6A 9.2CH 8K 150watt/ch Atmos/DTS:X Receiver to gauge power output and uncover performance issues we discovered. We discuss the proper settings for best power delivery.

www.audioholics.com

It delivers around 50watts per channel with 7 channels driven.

But according to, Audiovision, Link:

Yamaha RX-A6A (Test)

audiovision.de

it delivers 123 watts per channel and 7 channels driven.

Are there different versions of the Yamaha RX A6, one for Europe and one for the US, meaning the Europe version has removed the "yamaha power restrictions"?

Or do they just measure different in each test?
The only difference I can see is Audioholics measures @8 ohms, and Audiovision measures @6 ohms, but that alone should not makes this huge differences.

Could it be Yamaha did release firmware after Audioholics test that unleashed the true power of this receiver, and when Audiovision did their test they had this new firmware?

thoughts?

 

[TLS Guy]

Hi, wanting to buy this reciever, but according to audioholics review, Link:

Yamaha RX-A6A 9.2CH 8K AV Receiver Bench Test Results!

We bench tested the Yamaha RX-A6A 9.2CH 8K 150watt/ch Atmos/DTS:X Receiver to gauge power output and uncover performance issues we discovered. We discuss the proper settings for best power delivery.

www.audioholics.com

It delivers around 50watts per channel with 7 channels driven.

But according to, Audiovision, Link:

Yamaha RX-A6A (Test)

audiovision.de

it delivers 123 watts per channel and 7 channels driven.

Are there different versions of the Yamaha RX A6, one for Europe and one for the US, meaning the Europe version has removed the "yamaha power restrictions"?

Or do they just measure different in each test?
The only difference I can see is Audioholics measures @8 ohms, and Audiovision measures @6 ohms, but that alone should not makes this huge differences.

Could it be Yamaha did release firmware after Audioholics test that unleashed the true power of this receiver, and when Audiovision did their test they had this new firmware?

thoughts?

No receiver on the planet ever has, or could produce 123 watts per channel all 7 channels driven. The Audiovision report is a back of the neck job!

Lets do a deeper dive. The max wall power draw is 1160 watts from the wall. The preamp stages and processing will take 100 watts. That would be typical. So that leaves 1060 watts to be spread between 9 power amp channels. That leaves 118 watts for each power amp. Amp efficiency is between 50 and 70%.

So that leaves a possible output of 60 to 90 watts available for each channel, all channels driven. However the efficiency is likely to be nearer 60 than 90 watts per channel. This is because you get lower distortion as you bias more towards A. This lower distortion but also reduces efficiency. So I would say the 50 watts per channel all channels driven is nearer the mark and the Audiovision results are an absolute impossibility as energy can neither be created or destroyed as per the laws of thermodynamics.

 

[EBN]

No receiver on the planet ever has, or could produce 123 watts per channel all 7 channels driven. The Audiovision report is a back of the neck job!

Audioholics review of A6A was current limiting the nannies were affecting the results. Marantz SR8015/Cinema 30 tested 92 watts/ch @ .01% THD+N and 101 watts/ch at 1% with seven channels driven.

A6A is based on A30x0 model and looking example A3070 and the A8A both put out same amount. Also both models measured higher for 7ch than the Marantz Cinema 30 in Audiovision so if Gene could have got the real 7ch figures out from the A6A without nannies activating we would have seen +100w for 7ch!

Yamaha RX-A3070 (Test)

audiovision.de

Yamaha RX-A8A (Test)

audiovision.de

And look Onkyo pushes even more after you said it is not possible. The AVR hater strikes again!

The Onkyo TX-RZ70 was able to muster 118 watts/ch at 0.1% THD+N and 133 watts/ch at 1% THD+N into 8-ohms with seven channels driven.

Onkyo TX-RZ70 11.2CH AV Receiver Review

The Onkyo TX-RZ70 11.2CH AV receiver boasts 140 watts/ch, 8K HDMI inputs, Auro 3D, FREE Dirac Live and the BEST bench test results we’ve seen in its price class. Is this the best AVR at under $3k?

www.audioholics.com

Aside from the sheer mass of this unit, the back panel of the Onkyo TX-RZ70 gives you some indication that it is indeed a very powerful AV receiver. You can see this with the rating of 1095 watts, though let me remind you of the article and YouTube video we did on the topic of AV receiver power consumption that unless the unit states “Max Power Consumption,” you can safely bet it is NOT. If you recall how I explained this before, this power consumption estimate is usually based on ALL channels driven at 1/8th power, which is where a linear amp is least efficient (20% typical). So if we take 1/8 * (140) * 11 and then account for efficiency, you’re looking at about 963 watts. Add on another 100 watts or so for HDMI and DSP processing, and you get the 1095 power consumption figure stamped on the back of the unit. Despite the 1095-watt back panel power rating, my power measurements show that driving 7 channels at 130 watts per channel (130 watts x 7 / 0.6) equals 1516 watts. Adding processing power, the maximum power consumption is closer to 1600 watts!

 

[TLS Guy]

Audioholics review of A6A was current limiting the nannies were affecting the results. Marantz SR8015/Cinema 30 tested 92 watts/ch @ .01% THD+N and 101 watts/ch at 1% with seven channels driven.

A6A is based on A30x0 model and looking example A3070 and the A8A both put out same amount. Also both models measured higher for 7ch than the Marantz Cinema 30 in Audiovision so if Gene could have got the real 7ch figures out from the A6A without nannies activating we would have seen +100w for 7ch!

Yamaha RX-A3070 (Test)

audiovision.de

Yamaha RX-A8A (Test)

audiovision.de

And look Onkyo pushes even more after you said it is not possible. The AVR hater strikes again!

The Onkyo TX-RZ70 was able to muster 118 watts/ch at 0.1% THD+N and 133 watts/ch at 1% THD+N into 8-ohms with seven channels driven.

Onkyo TX-RZ70 11.2CH AV Receiver Review

The Onkyo TX-RZ70 11.2CH AV receiver boasts 140 watts/ch, 8K HDMI inputs, Auro 3D, FREE Dirac Live and the BEST bench test results we’ve seen in its price class. Is this the best AVR at under $3k?

www.audioholics.com

Aside from the sheer mass of this unit, the back panel of the Onkyo TX-RZ70 gives you some indication that it is indeed a very powerful AV receiver. You can see this with the rating of 1095 watts, though let me remind you of the article and YouTube video we did on the topic of AV receiver power consumption that unless the unit states “Max Power Consumption,” you can safely bet it is NOT. If you recall how I explained this before, this power consumption estimate is usually based on ALL channels driven at 1/8th power, which is where a linear amp is least efficient (20% typical). So if we take 1/8 * (140) * 11 and then account for efficiency, you’re looking at about 963 watts. Add on another 100 watts or so for HDMI and DSP processing, and you get the 1095 power consumption figure stamped on the back of the unit. Despite the 1095-watt back panel power rating, my power measurements show that driving 7 channels at 130 watts per channel (130 watts x 7 / 0.6) equals 1516 watts. Adding processing power, the maximum power consumption is closer to 1600 watts!

The max power draw of that Onkyo is 100 watts less then the Yamaha. So to achieve that result the power amps would have to be heavily balanced to class B, so then the question becomes what is the low output level distortion of that Onkyo. Biasing heavily to class B significantly increases low signal level distortion.

Even under the best of circumstances the max power that unit could provide would be 96 watts per channel, and that assumes that optimal biasing for max power and not SQ. One thing generally missing from spec sheets is the low level signal distortion. All this makes the case for class D amplification.