"pioneer sc-1227-k" vs "emotiva upa-700" actual Watts Per Channel - AVS Forum
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post #1 of 18 Old 10-29-2013, 10:37 AM - Thread Starter
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Was wondering if anyone has any information on the actually wpc when all 7 channels are driven. The specs say 125wpc but i really don't know. Now i'm in the process of buying an emotiva upa-700 which is 80wpc and a class A/B amplifier. With a proven bench test, just to see if this will make a difference. Does anyone think this will make a differance, An expensive test! Any info would be great.
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post #2 of 18 Old 10-29-2013, 03:18 PM - Thread Starter
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No? No one knows anything about these units?
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post #3 of 18 Old 10-29-2013, 03:30 PM
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There don't appear to be any reviews of the SC-1227-K on-line. But FWIW:

The UPA-700 is rated as follows:
Quote:
Number of Channels: 7

Power Output (rated power; THD < 0.01%):
. . .
80 watts / channel (8 ohms; all channels driven)

Rated Power Bandwidth (at rated power; 8 Ohm load): 10 Hz to 20 kHz + /- 0.06 dB

Meanwhile, pg. 108 of the SC-1227-K's owner's manual says this:
Quote:
Multi channel simultaneous power output (1kHz, 1%, 8Ω)
7 ch total.................................................600W

In other words, the SC-1227-K outputs 85.7W/ch., all channels driven, at 1kHz (not full bandwidth), with 1% distortion.

Not as good as the UPA-700, IMO.
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post #4 of 18 Old 10-29-2013, 03:36 PM - Thread Starter
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So your saying, well the manuals are saying that the emotiva will be louder and better. Also it's worth buying?
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post #5 of 18 Old 10-29-2013, 03:44 PM
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What I understand from those specs is that if you were to test the SC-1227-K full-bandwidth and aim for < 0.01% distortion, it would deliver less than 80W/ch. x 7.

Is the UPA-700 worth buying? That depends. If you're planning on driving more than 7 speakers to very loud volumes, the UPA-700 would be useful for driving 7 of them, with your AVR handling the remaining speakers.

If you're planning on driving up to 7 speakers to very loud volumes, IMO you'd do just as well to save a few bucks and get the UPA-500 for everything but your mains, and let the AVR handle those.
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post #6 of 18 Old 10-29-2013, 03:59 PM
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I know it's a lower unit but here are bench test results for the vsx-1123. Notice the huge drop off from 2 to 5 to 7 channels driven. I suspect the 1222 would suffer the same dropoff. The Emo would likely offer better power in a 7 channel setup.

HT Labs Measures
Two channels driven continuously into 8-ohm loads:
0.1% distortion at 127.7 watts
1% distortion at 146.2 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 87.0 watts
1% distortion at 95.7 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 59.6 watts
1% distortion at 71.5 watts
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post #7 of 18 Old 10-29-2013, 04:01 PM
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Quote:
Originally Posted by eljaycanuck View Post


If you're planning on driving up to 7 speakers to very loud volumes, IMO you'd do just as well to save a few bucks and get the UPA-500 for everything but your mains, and let the AVR handle those.

+1. Better idea.
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post #8 of 18 Old 10-29-2013, 04:02 PM - Thread Starter
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I will be driving 7 channels. I am driving 7 right now from the pioneer. But I want to go louder with it all. I have a cerwin vega 7.3 surround, just doesn't sound the way I want it too. I'm not to concerned about the money aspect. I just want to go louder and take the load off my avr. As I use it for everything including gaming and tv. I just want the most bang for the buck amp without going crazy.
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post #9 of 18 Old 10-29-2013, 04:05 PM - Thread Starter
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Quote:
Originally Posted by jm86wvu View Post

I know it's a lower unit but here are bench test results for the vsx-1123. Notice the huge drop off from 2 to 5 to 7 channels driven. I suspect the 1222 would suffer the same dropoff. The Emo would likely offer better power in a 7 channel setup.

HT Labs Measures
Two channels driven continuously into 8-ohm loads:
0.1% distortion at 127.7 watts
1% distortion at 146.2 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 87.0 watts
1% distortion at 95.7 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 59.6 watts
1% distortion at 71.5 watts
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post #10 of 18 Old 10-29-2013, 04:07 PM - Thread Starter
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Wow, I imagine that the 1227 does same thing. It also gets warm aswell. I hope changing it to preamp mode will change that.
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post #11 of 18 Old 10-29-2013, 04:38 PM
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Quote:
Originally Posted by dfi85 View Post

I will be driving 7 channels. I am driving 7 right now from the pioneer. But I want to go louder with it all. I have a cerwin vega 7.3 surround, just doesn't sound the way I want it too. I'm not to concerned about the money aspect. I just want to go louder and take the load off my avr. As I use it for everything including gaming and tv. I just want the most bang for the buck amp without going crazy.

Be careful what you say! If you really want the best bang for your buck check out the used market. A nice 2 or 3 channel amp with some serious juice would really open things up. Your Pioneer could easily handle the 4 surround channels and give you plenty of what you're looking for.
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post #12 of 18 Old 10-29-2013, 04:45 PM
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post #14 of 18 Old 10-29-2013, 06:01 PM
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Emotiva is currently having a sale so if you don't want to go used you can still get the XPA 5, XPA 3 or XPA 2 for a good deal. From what I understand, the best way to get the most bang for your buck is to buy an amp to drive your front three channels which are the work horses in your HT and allow your AVR to run the other four since they are only surrounds and don't really require a lot of power. 

 

With the current sale you kind of get the best of both worlds, a lot of power at a good price. And your amp will be new.

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post #15 of 18 Old 10-29-2013, 08:32 PM
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2 x power = +3dB perceived loudness barley perceptible

2 x loudness +10dB = 10 x power req. on same speakers

4 x loudness +20dB = 100 x power req on same speakers

here is something to look at




and this http://www.crownaudio.com/elect-pwr-req.htm

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post #16 of 18 Old 10-30-2013, 05:32 AM
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Quote:
Originally Posted by jm86wvu View Post

I know it's a lower unit but here are bench test results for the vsx-1123. Notice the huge drop off from 2 to 5 to 7 channels driven. I suspect the 1222 would suffer the same dropoff. The Emo would likely offer better power in a 7 channel setup.

HT Labs Measures
Two channels driven continuously into 8-ohm loads:
0.1% distortion at 127.7 watts
1% distortion at 146.2 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 87.0 watts
1% distortion at 95.7 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 59.6 watts
1% distortion at 71.5 watts

Not really true smile.gif
You should more compare it with the Pioneer Elite SC-61, which is technically the same as the Pioneer SC-1222 which is the predecessor of the Pioneer SC-1227.

Two channels driven continuously into 8-ohm loads:
0.1% distortion at 127.2 watts
1% distortion at 150.3 watts

Five channels driven continuously into 8-ohm loads:
0.1% distortion at 109.0 watts
1% distortion at 127.7 watts

Seven channels driven continuously into 8-ohm loads:
0.1% distortion at 99.4 watts
1% distortion at 110.3 watts

Two channels driven continuously into 4-ohm loads:
0.1% distortion at 213.8 watts
1% distortion at 247.5 watts


Source: http://www.soundandvision.com/content/pioneer-elite-sc-61-av-receiver-ht-labs-measures

TV: Panasonic TX-P50VT30E
Audio | Receiver: Pioneer VSX-AX2AS-S (Pioneer Elite VSX-82TXS) | Speakers: 2x KEF Q900 for Fronts | 2x KEF Q700 for Rears
Audio/Video Sources | Panasonic DMP-BDT 310 | Pioneer PL-510 | HTPC using Intel i3-3220 16GB XBMC on Ubuntu 13.10
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post #17 of 18 Old 10-30-2013, 12:28 PM
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Good point on the SC-61. I didn't realize the 1227 had the class D3 amps that the big SC Elites have. I thought it was more along the lines of the 10xx/11xx vsx group.
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post #18 of 18 Old 10-31-2013, 02:26 PM - Thread Starter
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But I still done get the thump I want from my cv e712's fronts even on stereo, under 2 channels driven. You don't think the emotiva upa700 will do that for me.
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