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Old 15th January 2008, 20:08   #18 (permalink)
reignofchaos
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Join Date: Apr 2007
Location: Bangalore
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Quote:
Originally Posted by Blue Thunder View Post
reignofchaos, I would like to know the source for your above statement. Onkyo receivers are well-known for their home theatre receivers, and their power ratings mentioned are always at 0.08% THD (OR LESS), definitely not 10% THD , that is ludicruous.

And one can get good wuality stereo integrated amps with 100 W into 8 ohms at 0.08% THD or less, at much less than a lac (should cost around 30K).
Please verify such technical info before posting on the forum. Thanx.
Show me one stereo amp that can output a real 100W into speakers and I'll buy it for you for free. Anyway here's the link for the receiver in this system

Onkyo HT-S570 - 5.1-Channel Home Theater System | Model Information | Onkyo USA Home Theater Products

The specs are:
Power Output (8 ohm, 1 kHz, FTC) 100 W/Ch
Dynamic Power* -
THD (Rated Power) 0.08 % (all channels)

Doesn't say how many channels driven, doesn't mention whether that THD is for 1 channel driven or all 6 channels driven. Doesn't mention the 20Hz-20kHz power rating. Seems highly suspicious to me.

Anyway here are Sound and Vision magazine's measured ratings of quite a few amps. Pay close attention to the Onkyo power ratings for the newer amps.... TX-SR501 and TX-NR901. Plus those power ratings are when the amp clips, which is way way higher than 10%. The distortion at 1W is roughly around 0.1%.

ratevsac

Anyway all these debates of power are basically meaningless. For an amp to sound twice as loud, it needs to be 4 times as powerful. So once can distinguish between a 25watter and a 100 watter in terms of loudness but one would be hard pressed to distinguish between a 50 watter and a 100 watter.

@shuvc: The sonus 2605 is quite a good speaker. However build quality is suspect. I utterly hate the Polk monitor series as they are really bright and are just uncomfortable to listen to. The higher end LSi series is quite decent though. The wharfedale diamonds are not an easy load and will struggle with this amp.

Last edited by reignofchaos : 15th January 2008 at 20:26.
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