Gain stages. BEWARE! - RBP

Tech Square

Technical and speculative discussion of amps, cables and other topics.

Gain stages. BEWARE!

Posted by RBP (P) on October 8, 2003 at 16:11:04

In Reply to: Why using line stage........ posted by bouncy ball on October 2, 2003 at 08:54:24:

Assuming you have corrected the Eq for RIAA, I have done several experiments along your lines.

A "gain stage" is the approximate amplification needed to "hand off" from one stage to another. OF course as mentioned, Impedance mating is paramount. Cable capacitance must be in tolerance with the appropriate gain stages.

You will get better dynamics running gain stage one, into gain stage two, into gains stage 3 than if you skip a single gain stage. In studio moniotoring, the dynamics were recorded using inverse gain stages, (Microphone to mic pre, to line pre, (riaa insered here) to Power amp, to cutter head.

It only makes sence to incorporate an equal number of gain stages in playback. Ommitting one gain stage and you are ommitting one level of dynamic amplification.

You playback system shall consist of phono cartridge to Phono pre (one gain stage) then to line preamp (2nd gain stage with RIAA inserted) to Power amplifier..(3rd gain stage) to Loudspeakers.

IF you ommit the gain stage via using a passive preamp...you are only insering an attenuator on the line level...and not using a gain stage...and your bass response and dynamic range will suffer.

I think this was gone over to me in therory and function 25+ years ago.

Audio AsylumÂ® Signature line: Hearing is believing.

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - Why using line stage........ - bouncy ball 08:54:24 10/02/03 (15)

Gain stages. BEWARE! - RBP 16:11:04 10/08/03 (1)

Re: Gain stages. BEWARE! - Tre' 20:20:54 10/02/04 (0)

big thanks to everyone. NT - bouncy ball 21:12:06 10/07/03 (0)

Re: Why using line stage........ - cheap-Jack 10:36:21 10/07/03 (0)

Re: Why using line stage........ - Carlos 16:10:52 10/06/03 (5)

Hi Carlos and cheap-Jack - bouncy ball 21:37:08 10/07/03 (4)

Re: Hi Carlos and cheap-Jack - cheap-Jack 13:38:09 10/21/03 (0)

Passive TVC et al.... - Thorsten 06:43:59 10/19/03 (1)

Re: Passive TVC et al.... - cheap-Jack 07:22:43 10/22/03 (0)

Re: Hi Carlos and cheap-Jack - Carlos 07:04:59 10/08/03 (0)

Re: Why using line stage........ - Carlos 16:10:37 10/06/03 (1)

Clarification on TVCs and Fletcher-Munson - Carlos 21:25:47 10/18/03 (0)

Re: Why using line stage........ - Tre' 18:59:56 10/04/03 (0)

Re: Why using line stage........ - john curl 15:01:20 10/04/03 (0)

Re: Why using line stage........ - Joelt 12:51:52 10/02/03 (0)

Follow Ups

Gain stages. BEWARE! - RBP 16:11:04 10/08/03 (1)

Re: Gain stages. BEWARE! - Tre' 20:20:54 10/02/04 (0)

You can not post to an archived thread.