Will changing gain affect frequency response?


NOT talking about increasing the volume at the listening position by turning the volume up...

Rather, with volume kept more or less constant at the listening position, is there some technical reason for things sounding a bit brighter when the pre-amp's gain setting is increased from -10 db to 0 db (again, volume adjusted downward, accordingly) OR is it my imagination?

Think I've encountered this with my pre-amp and most recently by altering the gain setting on my phono pre-amp.  Increasing the gain by moving the jumper to the highest position seems like it opened up the sound from the Grado cart I run.  

Hence the question...will changing gain affect frequency response? 

Thanks in advance.


128x128ghosthouse

Showing 1 response by dentdog

This discussion poses a question in regards to the Preamp-Amp gain/volume control. Should I run the amps [Mcintosh MC 60s] full out with the gain controls available on each amp and use a lesser level of volume on my preamp,[Zesto Leto tube pre]? Does trimming the gain on the amps give me less headroom when listening at higher volumes?

The output impedance of the Preamp is relatively low 150-250 Ohms to the input impedance of the amps which is 500K ohms. The preamp has two settings for gain, set internally, of 3 db and 12 db and came to me set at 3 db. I have very efficient speakers so the headroom of the amp and pre is sufficient either way. I rarely have the volume on the pre at 12, more at 10-11 max with the gain on the amps maxed out.

I ask this because I do fight brightness a bit and would like to optimally control the tone of the system towards a bit more mellow direction.