Yamaha Aventage RX-A1000 A/V Receiver HT Labs Measures

HT Labs Measures

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 53.9 watts
1% distortion at 63.8 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 53.0 watts
1% distortion at 63.6 watts

Analog frequency response in Pure Direct mode:
–0.07 dB at 10 Hz
–0.02 dB at 20 Hz
–0.07 dB at 20 kHz
–2.79 dB at 50 kHz

Analog frequency response with stereo signal processing:
–0.14 dB at 10 Hz
–0.05 dB at 20 Hz
–0.14 dB at 20 kHz
–66.30 dB at 50 kHz

This graph shows that the RX- A1000’s left channel, from CD input to speaker output with two channels driving 8-ohm loads, reaches 0.1 percent distortion at 121.0 watts and 1 per- cent distortion at 135.3 watts. Into 4 ohms, the amplifier reaches 0.1 per- cent distortion at 177.8 watts and 1 percent distortion at 213.9 watts.

Response from the multichannel input to the speaker output measures –0.07 decibels at 10 hertz, –0.02 dB at 20 Hz, –0.02 dB at 20 kilohertz, and –2.82 dB at 50 kHz. THD+N from the CD input to the speaker output was less than 0.007 percent at 1 kHz when driving 2.83 volts into an 8-ohm load. Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –97.43 dB left to right and –93.41 dB right to left. The signal-to-noise ratio with an 8- ohm load from 10 Hz to 24 kHz with “A” weighting was –108.41 dBrA.

From the Dolby Digital input to the loudspeaker output, the left channel measures –0.03 dB at 20 Hz and –0.01 dB at 20 kHz. The center channel mea- sures –0.03 dB at 20 Hz and –0.01 dB at 20 kHz, and the left surround channel measures –0.03 dB at 20 Hz and –0.03 dB at 20 kHz. From the Dolby Digital input to the line-level output, the LFE channel is +0.15 dB at 20 Hz when referenced to the level at 40 Hz and reaches the upper 3-dB down point at 94 Hz and the upper 6-dB down point at 116 Hz.—MJP

(800) 4-YAMAHA

techguy378's picture

Of course, this receiver can't hold a candle to one with Audyssey. Then no receiver without Audyssey can. I'm curious about one thing. It's my understanding that Yamaha's Aventage receivers can measure room acoustics from eight positions in the listening room. Do Yamaha's receivers simply average out the frequency response of the room?

MrSatyre's picture

I submit this for your consideration: Audyssey---as far as I am aware---is not, nor has it ever been, involved in the recording or mastering stages of any CD, game or movie reproduced by any of the systems which use it. How, then, can the engineers who developed it possibly know if their processes are recreating those sounds correctly? Simply put, they can't; they amount only to hypothesis. To my knowledge, only Pioneer's home-brewed MCACC (co-developed with and approved by AIR Studios), and Sherwood Newcastle's Trinnov (developed by Trinnov and approved by the French national TV and film studios, the BBC, Fox and others) can make such a claim. Furthermore, (again: as far as I am aware) Audyssey is only used "professionally" in IMAX theaters, and only AFTER all the audio has been recorded, mixed and mastered, and is used in IMAX theaters only as a global EQ. There is certainly a world of difference in sound (, speakers, frequency, direction, phasing, etc. between an IMAX theater and a home theater). They don't sound anything alike, even when an Audyssey system is being used in both.

Lastly, I would recommend this article on averaging of listening positions during room calibration: http://avroomservice.blogspot.com/2011/02/10-reasons-why-frequency-avera... (or "10 Reasons Why Frequency Averaging is NOT a Good Idea"). You will note the author has nothing to do with any of the auto-room calibration systems mentioned. I have not heard any system or room he has calibrated, so I can't make any comments pro or con; his points against averaging are valid, but I have not read any which can explain why averaging would be beneficial in the first place.

While I would gladly recommend ANY type of room calibration over none at all, I would expect everyone would prefer systems which have post-calibration results which can actually be verified by the content creators as being accurate and therefore beneficial.

Stephen Trask's picture

I myself have problems with the notion of any blanket settings determined by a computer program unless they are simply adjusting unless it's just adjusting decibel levels and, in a large space, the timing of the surrounds. That said, I'm not sure that it matters whether Audessey has been involved in mastering or the mixing. As someone who has mixed in surround many times, I can say that that doesn't really matter much. in fact, the fact that they are involved in theater set-up is a much higher recommendation for their product.

techguy378's picture

Audyssey's website says they don't do averaging like other technologies do. It's also my understanding that YPAO does do averaging meaning that if one seat has a dip at 200Hz and another has a peak at 200Hz then these two measurements will average each other out and no correction will be made. Audyssey can make corrections in the time domain at every single seat in the listening room. It's the only technology that can. It doesn't just smooth out acoustical problems like other technologies do. It fixes them. Has Pioneer finally upgraded their MCACC software to measure at multiple points in the listening room? If not then it will not improve the sound at all. If MCACC still uses a parametric equalizer with 10 bands or less it also will not improve the sound at all.

Stephen Trask's picture

I always enjoy your reviews but this one seems to leave some information out. There is, for instance, no comparison of this product with similarly priced offerings. But mostly I am confused by the 4 star feature rating and the four star value rating. Is their any other feature missing besides Audessey? If so, there is no mention of it. And the ergo rating at 5 stars seems to be a big enough deal that the overall should have been higher. I am not attached to this product in any way. I just am confused by ratings and the decision making.

Mark Fleischmann's picture
Techguy378: Your question has been submitted to Yamaha.

Stephen Trask: If you are confused, blame the rating system, not yourself. I spend 99 percent of my time on the text and the other 1 percent on ratings. So I encourage readers to look for answers and perspectives in the text. My definitive statement on ratings is here.

Having said that, I thought the Yamaha had good ergonomics due to the colorful and easy user interface, the spiffy cosmetics, and the smart combining of various functions under the Scene control. Yamaha also offers an excellent iPhone/iPod touch remote control app and a web browser control though they went unmentioned in this review. But another reviewer could have bestowed a different number for different reasons: what's easy or hard to use is pretty subjective and impossible to convey or even sum up in a numerical rating.

You were right that I knocked features and value down due to the lack of Audyssey or a convincing equivalent. In my experience Audyssey works better than Yamaha's YPAO. Audyssey isn't the only game in town -- I have also gotten great results from Pioneer's MCACC many times. Also Trinnov, admittedly only once. Apart from MCACC, non-licensed modes usually produce scattershot results.

Stephen Trask's picture

Thanks for responding. Your answer is probably the most definitive statement I've read on both the importance of room correction and the relative effectiveness of the different proprietary and licensed room correction systems. Can I take it from your list that you haven't used Anthem's ARC or does it fall into the scattershot category? Or can't you say. Room correction is probably the one feature that it is impossible for consumers to comparison shop so, again, your comments are quite helpful here.

Irrivirsible's picture

Many people on forums complain that the Yamaha receivers below the A2000 and A3000 do not allow multiple crossovers for speakers. If your fronts and backs play down to different levels you would have to find one crossover setting to work for all speakers instead of being able to use different crossover settings based on the speakers. Also, the receivers below the A2000 and A3000 do not EQ the sub and even the top 2 supposedly do it to a lesser degree than competitors. To some these are deal breakers. I would ask, what are your thoughts on the crossover and sub eq as described above?

Mark Fleischmann's picture
Stephen: Thanks for the encouragement. I've tried Anthem's ARC in a receiver exactly once. It worked well but I don't know it as well as I know some others. To get a handle on a room correction scheme, you've got to go through multiple setups over a long period of time. That's how I've gotten to trust Audyssey and Pioneer MCACC. I am a big fan of Paradigm's Perfect Bass Kit which works with certain PBK-compatible subs, having used it more than once and always liked the results.

Irrivirsible: I use (and alway recommend to readers) matched speakers, or at least matching driver sizes, so one x-over size fits all as far as I'm concerned. I'd say that a receiver that doesn't EQ the sub isn't doing the most important a room EQ scheme should be doing!

Stephen Trask's picture

It would be cool to do a side by side comparison of various room correction technologies. I also wonder how much the correction changes day to day or situation to situation. A living room full of people on a humid day sounds very different than that same room with one person on a dry day. I noticed that the new Rotel has a 10 band parametric EQ. That, combined with a good iPad app might be a really excellent tool for room cx. in many ways, I would much rather pay for an Audessey app and USB microphone combined with an onboard EQ than to simply have the technology built in. Then you could make easy, on-going adjustments and update the software or upgrade it as you desire.

Edit: I went to the Audyssey website today and found that they have been selling a recording studio version of Multi EQ through plug-in developer IK Multimedia, who make some great products. The product is essentially the same except that it's goal is to help music producers adjust EQ their mixes so as to correct for sound problems in their mix environments. The reviews by users are off the charts positive. I have been thinking of late, in general, that many of the advancements being made in home theater are simply about bringing to living rooms the sorts of hardware and software that recording studios have been employing for sometime. Dynamic Volume is just a mastering limiter/compressor. I wonder how long before some of the leading plug-in developers begin to market their products for home use, including DACs, limiters, EQ's etc. A company like Waves has spent well over a decade developing incredibly transparent and easy to use plug-ins that could easily be licensed as packages to AVR manufacturers. Avid and Apogee both have industry leading DACs that could easily be adapted for home theater use. Avid's Pro Tools also makes extraordinary plug-ins. I would not be surprised to see either of these companies partner with a manufacturer to produce some killer high end products at reasonable prices.

Stephen Trask's picture

I noticed, when looking at the new Aventage line-up for fall 2011 (yes, the product number is now rx-a1010) that YPAO comes in two varieties. The top two models in this series have something called RSC or Reflected Sound Control, which addresses early reflections. These are mostly high end clutter that can interfere with the crispness of a sound and possibly muddle dialogue and make violins and other high end score elements a bit cloudy. I wonder why this feature isn't included across the Aventage line. Is it a DSP or other processing issue or is it just to differentiate products. If it's the latter, then that is a mistake. RSC would probably bring YPAO in line with Audyssey in terms of effectiveness and, in the case of this review, may have resulted in a 5 star review down the line. Which, in turn, could sell a lot of AVRs.

Tobin's picture

Can anyone explain the difference between the Yamaha "Aventage" line (the RX - A810 for example) and the RX-V871? Why the two lines of product? What is the distinction between the two lines? The Yamaha website says the RX-V871 is "New" just like the Aventage line is "New".

Sebastiao Falcao Jr's picture

Please help me:
I sent this receiver for repair and it was returned without the remote control and the power cord.
I would very much appreciate your telling me where can I buy such parts in the US. Pls also give me the site address.
I thank you very much for yr help.