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Old 8th April 2003, 05:29 PM   #21
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I'm planning on using this SX-D7000, Pioneer receiver in my bedroom. Do you think it may equal Onkyo performance?
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Old 8th April 2003, 07:04 PM   #22
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Quote:
Originally posted by Peter Daniel
I'm planning on using this SX-D7000, Pioneer receiver in my bedroom. Do you think it may equal Onkyo performance?
I have no idea but I somehow doubt it. It looks like it's early 80's vintage? Some Japanese stuff back then wasn't even using direct coupled output stages (i.e. they had single rail power supplies and a huge capacitor in series with the speakers).

As I've said many times, I only maintain that amplifiers that MEASURE reasonably well will be hard to tell apart in a proper blind test. I'm not sure your antique Pioneer would measure reasonably well--especially now that's it's 20 or so years old.

Obviously you're having fun here. That's fine. Here's a pic of the Onkyo SR500 used in the blind challenge.
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Old 8th April 2003, 07:20 PM   #23
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From what they publish it seems like pretty good measurements:
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Old 8th April 2003, 07:25 PM   #24
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And this is schematic of the output stage. It looks pretty good to me again, and there is no sign of " no direct coupled output stages (i.e. they had single rail power supplies and a huge capacitor in series with the speakers)". It actually might be better than Onkyo.
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Old 8th April 2003, 07:31 PM   #25
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Default The Wrat tecnologie...

Hi Nw
This Onkyo maybe have a very good audio perfomance...(and i say maybe ) because i haven't do the null test with it!!!

The WRAT technologie is a current feedback power amp that achieve a large bandwith and very low phase shift across it...and high slew rate...

So i'm not surprised...that it can sound good...
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Old 8th April 2003, 07:44 PM   #26
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Quote:
Originally posted by Peter Daniel
And this is schematic of the output stage. It looks pretty good to me again, and there is no sign of " no direct coupled output stages (i.e. they had single rail power supplies and a huge capacitor in series with the speakers)". It actually might be better than Onkyo.
If that's the schematic and specs of the receiver/amp you want to test with, AND if it still meets those specs with its dried up old electrolytics, after any repair work that's been done to it over the years, etc, then it should do reasonably well in a proper blind test.

Any "objectivists" in Toronto want to pop over to Peter's place to run a blind test for him? The only catch is, you have to compare it to another amp that measures reasonably well, keep them within their power limits, have them properly level matched, etc.
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Old 8th April 2003, 07:46 PM   #27
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Default Re: The Wrat tecnologie...

Quote:
Originally posted by Tube_Dude
Hi Nw
This Onkyo maybe have a very good audio perfomance...(and i say maybe ) because i haven't do the null test with it!!!

The WRAT technologie is a current feedback power amp that achieve a large bandwith and very low phase shift across it...and high slew rate...

So i'm not surprised...that it can sound good...
That's a good point. I'm not sure if WRAT gives it an audible advantage or not but that is another way the Onkyo differs from most receivers in its price range. Onkyo also claims it's a low NFB design.
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Old 8th April 2003, 08:02 PM   #28
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Quote:
Originally posted by nw_avphile



Any "objectivists" in Toronto want to pop over to Peter's place to run a blind test for him? The only catch is, you have to compare it to another amp that measures reasonably well, keep them within their power limits, have them properly level matched, etc.

For that occasion I keep a better amp. I still have the access to Carver M1.0t (my brother in law bought it from me years ago) and can use it anytime for a blind test. Anybody's interested?

I have a weak spot for an old Pioneer stuff and I buy it whenever I see a good deal.
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Old 8th April 2003, 08:09 PM   #29
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Peter,

I think the Pioneer will do very fine in your bedroom.....especially when you´re sleeping

william
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Old 8th April 2003, 08:15 PM   #30
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Too bad it doesn't display time
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