Pretty weak numbers for a $1200 receiver.
If you are referring to HT ACD numbers, then yeah they seem a little low. However, like I said before, ACD tests don't reflect real world applications nor do they test the power delivery capability of Yamaha. All they test is the response of the protection circuits. If you want to see actual power measurements, look at the numbers of two channel tests. In two channel mode, they only way the Yamaha goes into protection is under short circuit conditions.
From the audioholics power tests..
Yamaha RX-A1010 AVENTAGE A/V Receiver Review Measurements and Analysis | Audioholics
The Yamaha RX-A1010 handedly exceeded its 110wpc power rating continuously with two channels driven and put out a commendable 155wpc both channels driven into 4-ohms; and that’s a full power bandwidth measurement (20Hz to 20kHz at 0.1% THD + N). You can see the protection circuit kick on during our ACD tests, purposely limiting power to 70wpc for all seven channels driven. This means the RX-A1010 was dissipating nearly 980 watts from the wall outlet to deliver this much power to all seven channels. Not bad for a sub $1k receiver with a 600VA power supply.
In short time, there is no doubt in my mind forum trolls seeing the ACD power numbers for this receiver 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.
The RX-A1010 delivered impressive dynamic power results under all loading conditions. Into 8-ohms, 1 channel driven, the RX-A1010 produced 170wpc or about 1.9dB of headroom over its 110wpc rating. Interestingly the RX-A1010 delivered similar results into 1 or 2 channels driven into 4-ohm loads producing in excess of 260wpc. Yamaha specs the RX-A1010 as being able to deliver 210wpc dynamically into a 4-ohm load. I would say that is rather conservative given my measurement results using the CEA 2006 burst test.
I would say pretty impressive numbers for a $1200 receiver
