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In Reply to: Re: HELP: HT Pre-amp Choices posted by kotches on January 31, 2001 at 22:35:30:
I may be adding DVD-Audio in the future, but I don't really need the all-channel analog btpass as I am connecting my CD changer and DVD player digitally to the Preamp (because I want to use the Preamps D/A instead).So, having the best D/A is really important to me (as well as) decent DTS and Dolby digital decoding.
I also want the pre-amp to have no hum or any audible residual noise.
I've heard B&K are susceptible to this.
Follow Ups:
I had a B&K Ref 30. After sending it back for two repairs to get rid of digital noise that was output to the center channel when the preamp is in DIRECT mode(which is not truly direct....the volume is still in digital domain) and in any form of 2 channel mode, I gave up on it. I tried 3 other units on three other systems and they all had this problem. It's a shame about that too, because it does HT so well. For me it was not something I could live with. I did as some others have suggested and got a krell 2 channel preamp with a processor loop and a denon 3801 to pull 5.1 duties.
How can a processor have "analog bypass" and 5.1 channel direct inputs (5.1 bypass) and have the volume control in the "digital domain". To control volume in the digital domain, you have to have bits to work with, and there are none in the Reference 30 in direct mode or on the DVD-Audio input. These are self-contradictory.There are items such as the Crystal Semiconductor CS3310, which is a digitally controlled analog volume control. This volume control switches in and out discrete resistors in 0.5dB increments from -95.5dB of attenuation to +31.5dB of gain. Although interfaced digitally, it operates purely in the analog domain for volume control.
Care to cite your source of information for the comment that the volume control is in the digital domain?
Regards,
Sorry kotches, I must have misunderstood something.
If you do add dvd-a or sacd, you will need a 6-channel input with stereo/analog bypass as external d/a converters for these formats do not exist at this time. Take a look at the McIntosh MSD-4 processor/preamp...doesn't do video switiching, but some of the best dd and dts i've ever heard! Good luck to you.
On my system, which I'd consider to be entry level high-end, I have
no hum, no noise, with gain at maximum, and ears against the speakers.It's listed under inmate systems under my moniker, kotches.
Regards,
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