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Old 8th November 2008, 08:28 AM   #11
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Quote:
Originally posted by Babowana
Broken
Or, preamp "Out" is power amp "In", for an integrated amplifier.

(Babo be good boy and get plenty of rest, or i'll come over and hit you with a PR candle)
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Old 7th May 2009, 08:19 AM   #12
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It seems the INT 150 uses a DS1802 for volume control No wonder people are keen to use their own preamps.
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Old 7th May 2009, 07:03 PM   #13
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Have you listened to one (an INT150)

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Old 7th May 2009, 07:13 PM   #14
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No, but i've listened to the 1802.
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Old 7th May 2009, 08:08 PM   #15
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If you used a circuit based on the manufacturer's app notes,
then perhaps that is understandable. Our circuit is not based on
the app notes, and we get very good performance.

I have 11 subjective reviews internationally on the INT150 and
they are uniformly great. Not one complaint about the volume
control or the sound in general.

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Old 7th May 2009, 08:26 PM   #16
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I have little doubt the amp sounds great. Could it be even greater with a proper attenuator?

Regarding the DS1802 i probably lack the imagination of using it in sufficiently radical way to make it shine. Tried it both as a potentiometer and as a shunt and it predictably sounded better as a shunt. It certainly beats cheap Alps pots, especially in tracking. Taking into account how compromised are the majority of preamps anyway - opamps, electrolytic or otherwise compromised coupling caps, 3-terminal regulators, etc it may well sound better than most.
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Old 7th May 2009, 09:07 PM   #17
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A crumb : http://www.diyaudio.com/forums/showt...16#post1553816
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Old 7th May 2009, 09:45 PM   #18
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As luck would have it my DS works into a full megaohm - tube amp. And so do the DS chips in ARC preamps of which i have owned a couple with DS1267 and DS1666. The ARCs were so bad that it was difficult to blame the DS.
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Old 7th May 2009, 09:58 PM   #19
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No doubt it could be better, but frankly we weren't willing to chase
Shalco switches driven by steppers. As it was, we received a lot of
complaints about mechanical noise when we used relays.

Wayne continues to work on it, and progress will be made.

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