Is this a mistake?

[ZIPPO]

I was looking at the power ratings for the Onkyo TX-NR807 receiver in this review( http://www.hometheatermag.com/receiv...ver/index.html ) & saw this:

Onkyo TX-NR807 A/V Receiver:

HT Labs Measures
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 105.5 watts
1% distortion at 122.0 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 29.9 watts
1% distortion at 33.0 watts

Traditional Look, Smart Ergonomics
"The TX-NR807 boasts 135 watts into 8 ohms with two channels driven, according to the spec sheet. As usual, see our measurements."

Seems like a pretty big drop off for a 135W/ch THX Select2 certified receiver.

[Hammie]

Originally Posted by ZIPPO

I was looking at the power ratings for the Onkyo TX-NR807 receiver in this review( http://www.hometheatermag.com/receiv...ver/index.html ) & saw this:

Onkyo TX-NR807 A/V Receiver:

HT Labs Measures
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 105.5 watts
1% distortion at 122.0 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 29.9 watts
1% distortion at 33.0 watts

Seems like a pretty big drop off for a 135W/ch THX Select2 certified receiver.

Nope. That is pretty typical for Onkyo. If you look closely at their power ratings, it states 135W when 2-channels are driven. Most other manufacturers will state something like 130W with all channels driven.

[Driver_King]

That's really too bad. The Onkyo TX-SR805 was capable of outputting its rated wattage per speaker. It has gotten worse since considering the 806 and now this.

[Steve]

Originally Posted by Driver_King

That's really too bad. The Onkyo TX-SR805 was capable of outputting its rated wattage per speaker. It has gotten worse since considering the 806 and now this.

If I'm not mistaken, Onkyo writes the specs for all their models like that. I know for a fact they're written like that for my 605. It's a shame they don't give you a spec that's written in a way that means something.

[Mordir]

Originally Posted by louhamilton

Most other manufacturers will state something like 130W with all channels driven.

Most of the other manufacturers (from what I have seen) do not state all channels driven. Most of them state 2 channels. For the most part Onkyo was very close to their advertised power ratings up through the xx5 (i.e. Onkyo TX-SR875) but the xx6 and beyond have been a disappointment. One thing to note is the weight of the receiver. If you have one stating they give 120 watts per channel but it weighs in at 21lbs chances are you will not get anywhere near 120 per channel when running all channels. There is an average efficiency per pound to consider and you simply can't provide that much power with such a light unit.

[HAMP]

Onkyo TX-NR807 A/V Receiver:

HT Labs Measures
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 105.5 watts
1% distortion at 122.0 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 29.9 watts
1% distortion at 33.0 watts

Seems like a pretty big drop off for a 135W/ch THX Select2 certified receiver. [/QUOTE]

I'm wondering if that is a misprint, that is one hella of a drop.

Here is the 805 like Driver_King stated.

HT Labs Measures: Onkyo TX-SR805 A/V Receiver
Five channels driven continuously into 8-ohm loads:
0.1 percent distortion at 162.0 watts
1 percent distortion at 184.5 watts

All channels driven continuously into 8-ohm loads:
0.1 percent distortion at 120.4 watts
1 percent distortion at 151.7 watts

[ZIPPO]

Originally Posted by HAMP

I'm wondering if that is a misprint, that is one hella of a drop.

That's what I was thinking. To get a THX certification don't they have to put out a set percentage of the rated power?

[rlf3911]

I'll stick with my 805 : ) It rocks my speakers.

[Twitch9]

No, THX certification has nothing to do with power ratings.

[Rob J in WNY]

Originally Posted by HAMP

I'm wondering if that is a misprint, that is one hella of a drop.

+2

Totally agree. That is a significant drop, even considering all channels driven. I hope that is a misprint, because if not, it seriously de-classes that model. I need to get my subscription to HT Magazine going again...

[rpatt]

Originally Posted by Rob J in WNY

+2

Totally agree. That is a significant drop, even considering all channels driven. I hope that is a misprint, because if not, it seriously de-classes that model. I need to get my subscription to HT Magazine going again...

I'm with you guys. It's hard to believe that going from five to seven channels could cause that big of a drop in power.

[ryan4blu]

hard to believe that the higher grade model does this, it must be a misprint. below is the stats on my receiver and it cant be better that the one in question??

HT Labs Measures: Onkyo TX-SR606 A/V Receiver
Five channels driven continuously into 8-ohm loads:
0.1 percent distortion at 81.2 watts
1 percent distortion at 109.4 watts

Seven channels driven continuously into 8-ohm loads:
0.1 percent distortion at 73.2 watts
1 percent distortion at 87.4 watts

Analog frequency response in Direct mode:
–0.04 dB at 10 Hz; –0.00 dB at 20 Hz
–0.01 dB at 20 kHz; –2.54 dB at 50 kHz

Analog frequency response with stereo signal processing:
–3.25 dB at 10 Hz; –1.13 dB at 20 Hz
–0.06 dB at 20 kHz; –25.30 dB at 50 kHz

[callas01]

Once again why everyone needs pre-outs for an external amp,

OR just buy the Marantz receivers... this is my next component purchase.

[tbizzle]

Originally Posted by Driver_King

That's really too bad. The Onkyo TX-SR805 was capable of outputting its rated wattage per speaker. It has gotten worse since considering the 806 and now this.

That's what made me jump on mine when I had the chance. It's a shame they aren't the same nowadays

Originally Posted by rlf3911

I'll stick with my 805 : ) It rocks my speakers.

You speak the truth my man! Although I can't wait to add an amp someday

[Driver_King]

Originally Posted by fireman325

If I'm not mistaken, Onkyo writes the specs for all their models like that. I know for a fact they're written like that for my 605. It's a shame they don't give you a spec that's written in a way that meany something.

I'm not so sure about the other Onkyo models, although it seems as though the NR-807 measurements are a misprint, but I know the 805 benched within a few watts of its stated power. If it didn't, then I would be screwed with my low impedance speakers at the levels I play.

[Steve]

Originally Posted by Driver_King

I'm not so sure about the other Onkyo models, although it seems as though the NR-807 measurements are a misprint, but I know the 805 benched within a few watts of its stated power. If it didn't, then I would be screwed with my low impedance speakers at the levels I play.

I was only commenting on the way the spec is presented, which is the same for all Onkyo receivers I've looked at (but I haven't looked at them all). My previous statement only concerns the printed spec, and not the actual performance of the receiver.

[ReverendSlim]

Originally Posted by Driver_King

I'm not so sure about the other Onkyo models, although it seems as though the NR-807 measurements are a misprint, but I know the 805 benched within a few watts of its stated power. If it didn't, then I would be screwed with my low impedance speakers at the levels I play.

Here's a clue to why the 807's not benching nearly as well as the 805: The 805 weighed 50.9 pounds. The 807 weighs 39.7 pounds. When you consider that the primary source of weight in a receiver is typically the transformer for the amp section, go figure that the 807 doesn't live up to the 805's legacy. The 805 was really kind of a fluke, considering its cost vs. performance. The closest thing they have to it now is the TX-NR1007. Not sure what the 1007 benches like, but I can tell you that mine blows away the 705 I had before it.

[ZoetMB]

HT Labs Measures
Five channels driven continuously into 8-ohm loads:
0.1% distortion at 105.5 watts
1% distortion at 122.0 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 29.9 watts
1% distortion at 33.0 watts

One thing I don't understand (assuming the above is correct):
Let's say you're setup for seven channels and the extra two channels are used for rear surrounds.

You're playing a movie and there's nothing coming through the rears.

A few seconds later there's a big effect coming through the rear surrounds, but there's still music pushing through the L and R, dialog through the center, and other effects through the side surrounds. Assuming that at the moment of that change, the receiver is pushing more that 30 watts, does the distortion suddenly jump drastically because the receiver can only put out 22.9 watts at 0.1% if all channels are driven???

Whatever happened to discrete amplification, even in receivers?

[Dathon]

Maybe I'm missing something here, but Pioneer's SC-25/27 both weigh about only 40lbs too. Yet the specs say 140Wx7ch with 7ch driven. How can Pioneer be the same weight as Onkyo, yet have continuous 140Wx7ch?

[quetzalcoatl]

Originally Posted by Dathon

Maybe I'm missing something here, but Pioneer's SC-25/27 both weigh about only 40lbs too. Yet the specs say 140Wx7ch with 7ch driven. How can Pioneer be the same weight as Onkyo, yet have continuous 140Wx7ch?

Yes but it could also have something to do with the fact all the new pioneers are being run with icepower.