Originally Posted by TPnBobcats
Has that been proven by testing? They do claim 140x7 all channels driven for it on their web site.
Gene just complete a review on the pio 07 this December!http://www.audioholics.com/reviews/r.../pioneer-sc-07
Here is an excerpt on the amp:
I measured about 10dB of preamplifier gain which is considerably lower (ideally 13dB or more) than I'd like to see from a preamplifier but figured it must have been deliberately done for proper volume scaling of all of the post processing such as THX, MCACC and TrueHD / DTS-HD decoding. This could present a problem of achieving full power when listening to low level sources and using external amplifiers with relatively low voltage gain structures. I was unable to find a way to increase input trim level to boost the gain like I have seen on other brands in the past.
The SC-07 was able to produce 3Vrms unclipped via the multi-channel analog outputs which is plenty of signal to drive any amplifier into clipping. I was unable to sweep beyond 40kHz without the preamp shutting off because of the overshoot caused by the reconstruction filter (typical of Class D designs). But the frequency response from 20Hz to 20kHz was ruler flat with a gradual rise up to 40kHz.
Bass management was NOT active for the multi-channel inputs so if you're using a Blu-ray player to do the decoding, make sure you enable the player's bass management controls.
Power Amp Sectionhttp://www.audioholics.com/reviews/r...iew_fullscreen
Pioneer SC-07 Power Bandwidth Measurement
When driving an 8-ohm load, the SC-07 did very well in exceeding its stated 140wpc rating. Because of the higher efficiency of the amplifier design, 1CH and 2CH measurements were virtually identical since the power demand from the wall outlet was less, resulting in no appreciable line sag.
Driving 4-ohm loads was an entirely different story. The SC-07 simply fell apart when running full bandwidth (20Hz to 20kHz) continuous power measurements. As I tested at frequencies above 5kHz with only 1 channel driven, the internal cooling fan would instantly come on right before the receiver would go into gross distortion and shut down at levels above 100 watts. With two-channels driven, I was able to squeeze out a clean 150wpc at less than 0.5% THD. Anything higher would again run the amps into gross distortion and shut off the receiver. I was a bit perplexed in how the receiver managed to better cope with 2 channels driven over 1 and could only surmise that it had something to do with symmetrical load balancing on the power supply. How this receiver was awarded the THX Ultra2 rating was a bit perplexing to me.
Power output: <0.1% THD + N
1CH, 8-ohms: 150wpc
2CH, 8-ohms: 150wpc
1CH, 4-ohms: 290wpc (1kHz, conditionally)
2CH, 4-ohms: 280wpc (1kHz, conditionally)
Keep in mind most review publications don't do full bandwidth continuous power measurements and they usually publish power measurements into clipping at 1% THD + N at 1kHz. I've seen this receiver reviewed in other home theater publications where they raved about its power capability and it is clearly obvious to me that they didn't actually run full bandwidth continuous sweeps into 4-ohm loads. This is something I do of all receivers regardless of price.
For more info on amplifier measurements, see: The All Channels Driven (ACD) Test"