I really don't see the point of using a preamp as it's just extra components in the signal path with no real upside. Reminds me of those dreadful "tube buffers" Musical Fidelity used to sell which is pretty much what you are doing. In theory it is possible to get more voltage out of the amp with a higher voltage input but in reality it isn't true due to the hard limits put in place by the voltage rails.
My firm belief is that an amp should be wire with gain, a neutral conductor which tries to impact as little of its sound on the signal as is possible. Feeding a low distortion output from the source through a high distortion tube preamp before passing it to a low distortion amp/phones combo just doesn't make sense to me.
I do use a preamp to power my system but it is built into my dac so it's just a very powerful output stage mated with a logic controlled stepped attenuator. There are no extra circuits to worry about.
Thank you Spritzer for your explanation
In my set up now are :
Pre amp tube T+A. P10.2 > cd player Stello cda 500 > DAC eximus Dp 1 > Stax srm 727 mk 2 as power amp = set up A
I use DAC as well to my set up
Pre amp eximus Dp 1 > DAC eximus Dp 1 > cd player Stello cda 500 > Stax Srm 727 mk 2= set B
My set up B > much better the sound quality vs my set up B
My conculsion : if your pre amp very good , can produce better sound quality.
The reason why I use my tube pre amp :
I bought my T + A P10.2 already expensive for driving all my dynamic and ortho , that s why I bought the Stax Srm 727 mk2 as power amp .
I wish one day can compare with my friend set up use BHSE for his Sr 009
His opinion for the combo BHSE + Stax Sr 009 = to bright
I have read in the Stax thread , the best amp for Stav Sr 009 are Cavalli Loghtning and WES
Is that true Sprizer for the best pairing for Stax Sr 009 these combo with Cavalli Lightning and WES ?
Please advise and Thank you