traynor3's picture
Last seen: 7 years 9 months ago
Joined: Apr 11 2016 - 12:53pm
Bypass Preamp on Pro-Ject Debut Carbon USB
Jammond's picture
Last seen: 6 years 9 months ago
Joined: May 16 2017 - 6:13am

I wondered if you had any luck doing the bypass? I'm sure it must be quite simple, in theory, but practically it could be fiddly.

I bought this turntable a few years back when I was listening through powered monitors in my university room. I can't find much info about the built in pre-amp, only that it's MM.

Now I've upgraded to Neat Motive 3 speakers and soon will get a Nait Naim amp (both pre owned).
I don't want the built in preamp to be holding back my signal quality. Or maybe I'm being anal. I'm new to all this.


TheShiz's picture
Last seen: 6 years 3 months ago
Joined: Oct 29 2017 - 9:58am

Has anyone figured out yet how to bypass this preamp?

absolutepitch's picture
Last seen: 1 month 3 weeks ago
Joined: Jul 9 2006 - 8:58pm

Not familiar with this TT. But if there is a line out that is RCA jacks, that could go into a amp, or pre-amp line in. However, going into a pre-amp's line-in is adding more electronics in the path that is better omitted.

adespade's picture
Last seen: 1 year 2 months ago
Joined: Dec 24 2022 - 6:59am

SAS Audio
SAS Audio's picture
Last seen: 3 months 3 weeks ago
Joined: Jun 6 2007 - 6:56am

A couple of considerations. First, the phono cartridge output needs gainstages that incorporate an RIAA de emphasis network
or the sound will be unbearably bright.

Second, the capacitance of the tone arm wiring to ground, ic capacitance between the turntable and phono stage, and input capacitance of the phono stage needs to be considered and optimized for optimum flat frequency response.

Each cartridge requires a different total capacitance.

Hope this helps.


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