Marantz PM7003 + Passive Pre Amp (stepped) questions

nad · 16th June 2011, 08:24 PM

Hello folks,

I have a lightly 'breathed upon' CD6003 > PM7003 > B&W685 setup that is fit for it's purpose (office system) but I was just wondering....

Both the CD & PM use Marantz's discrete HDAM2 rather than opamps, not that I dislike the output but it could do to be a bit more 'dynamic', so not being able to simply swap opamps I was thinking of removing half of the 'sonic signature' by bypassing the pre amp.

The PM7003 has a 'power amp direct' input so I was thinking of building a simple stepped attenuator, probably one of those cheap vishay/dale stereo kits from flebay.

First up, I have no idea what kit I need (25k?) to get a linear output to zero, secondly, will the power amp play havoc with a passive pre?

Any helpers???

Ta,
Ant

nad · 2nd July 2011, 07:00 PM

Nobody?

Cheers guys

16th June 2011, 08:24 PM	#1
nad diyAudio Member Join Date: Oct 2009	Marantz PM7003 + Passive Pre Amp (stepped) questions Hello folks, I have a lightly 'breathed upon' CD6003 > PM7003 > B&W685 setup that is fit for it's purpose (office system) but I was just wondering.... Both the CD & PM use Marantz's discrete HDAM2 rather than opamps, not that I dislike the output but it could do to be a bit more 'dynamic', so not being able to simply swap opamps I was thinking of removing half of the 'sonic signature' by bypassing the pre amp. The PM7003 has a 'power amp direct' input so I was thinking of building a simple stepped attenuator, probably one of those cheap vishay/dale stereo kits from flebay. First up, I have no idea what kit I need (25k?) to get a linear output to zero, secondly, will the power amp play havoc with a passive pre? Any helpers??? Ta, Ant

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2nd July 2011, 07:00 PM	#2
nad diyAudio Member Join Date: Oct 2009	Nobody? Cheers guys

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