Help needed retubing Quad Preamp

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DaveShred86

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Hi folks!

I just obtained a Quad Preamp some months ago and it came with all Chinese tubes, I think it sounds a little bit harsh to me now...so... I already have some spare NOS tubes at home to change V11,V13, V21, V23 and V12 positions... thing is... I actually go out the Quad from the Send output bypassing the Fx return, and I use no reverb.. do I need or should affect the tone if I don't change V14, V24 and V22 tubes?

Here is the signal route...

The tube/signal flow is as follow:
CH1------V21-----V23-----V12b-----
input---[ ]-----V24-----V14-----fx loop----V22
CH2 ------V11-----V13-----V12a-----

V11=input CH2
V12=CH1 + CH2
V13=lead CH2
V14=GraphicEQ + Reverb mixer

V21=input CH1
V22=FX return + output
V23=lead CH1
V24=reverb

thanks for the tips!
 
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