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-   -   A question on crosstalk (http://www.diyaudio.com/forums/solid-state/36290-question-crosstalk.html)

sardonx 18th June 2004 07:16 PM

A question on crosstalk
 
Would the difference between an amp with say 78db crosstalk and another with 90db crosstalk be audiable at all?

K-amps 18th June 2004 07:38 PM

I'd say depends on the spectrum of noise.... but very little difference unless you have Klipschorns. :D

sardonx 18th June 2004 11:51 PM

thank you k-amps :)

sardonx 18th June 2004 11:54 PM

I mainly ask because my pre-amp has a crosstalk measurment of 105db. And the amp I want to get is a perfect match in all respects except it has a seperation of 78 - 85db. I don't want to degrade the sound in any noticable way.

dnsey 19th June 2004 07:39 AM

I wouldn't worry abt it.
There are many who consider that a little crosstalk is a good thing for imaging. It's used commercialy in the Frankenstein enhancer, which was generally well reviewed.
Some of the best imaging I've come across was from an old Armstrong tube amp with clearly audible crosstalk.

sardonx 21st June 2004 11:35 PM

thank you, dnsey.

sardonx

Eva 21st June 2004 11:45 PM

Listening rooms usually have only -1 dB or so crosstalk :D

Anyway, most crosstalk found in power amps is usually due to poor PSRR [or poor layout and/os ground loops] and this is a more important issue [poor crosstalk usually comes together with poor PSRR at midrange or trebble, and I'm not talking about rejecting 100Hz buzz but about rejecting the ripple the own power amplifier circuit creates on its power supply rails and/or the voltage drops it creates on its own circuit tracks]


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