Dear Ski Bum,

You have translated what I have been hearing into words so well.  As soon as the break-in is completed (I still have 200-250 hours to go), I will start investigating all the options you have presented, namely the EX mode as well as the sub-bass enhancement.

In the meantime, I will look into the KT77's suggested by ZYGI.

Thanks for all the suggestions.  Best,

Alper

Here is a new update for those who are interested in hearing...

I recently bought a pair of Genalex Gold Lion KT77's just to give a try...  It has some serious bass in comparison to the EL34's.  So the current tube combination is as follows:

On the SE34I.2+:
6N1P (bought from Decware)
Genalex Gold Lion KT77
GZ32 (Mullard NOS from 1967)

On the CSP:
6N2P on all three positions (bought from Decware)
Bendix 6106

Lon - I tried the 6N2P's on the SE34 further to your reccommendation, but they were a little on the loud side as far as hum goes.  Without the pre in the signal chain, that amp is dead silent with all sorts of tubes.  Somehow, as soon as the CSP is put in lime, there is hum in the system, which is fine with 6N1P on the SE34, but when I swap them with the 6N2P's, somehow, it gets quite loud.  Not as loud as getting in the way of the music, but when nothing plays...

Cheers,

Alper