software

Years ago when I had my SF Twin It was strelie an bright sounding. So
I Install the Torres pre-CBS mod. WOW ! Now the amp sounded warm
and had some overdrive to it YEA!! So when I got my Princeton ( like
a Dum bass) I put the cbs mod, the perfect prince mod (Which is his
Idea of fixing the Phase Inverter, Kinda of silly in retrospect) and a
kendricks blackframe speaker in it. well the amp sounded better than
stock But still hade some short comings. Like a very raggy low end
and very eary and harsh breakup. (must be the 10quot; speaker and
rectfier tube) NOPE ! So I put a Weber cali speaker in it. problem
solved? NOPE ! Now even worst. Later break up but really harsh
ratty distotion. Must be the tubes, So I retubed it. NOPE ! same
problem. So i do the Stokes mod (That moves the B voltage going
to the PI down stream) And the Paul C. mod ( a clever way to balance
the PI and get more headroom) Now the amp is real loud but still sounds
aweful. harsh breakup and raggy lowend. Must be the filter cap. NOPE !
I recaped the amp with orange drops and a new filter cap. Same Ole' same. I'm getting ready to give up then someone suggested
to lost the torres mod. So last night I changed all the value's back to stock.
problem solved? You BETYA the amp sounds better than ever now !!
Moral of the story... If you have a Princeton or deluxe No need for Torres mods. I just put over $175 in to this amp. To discover the $15 Torres
mod was the culprit. I always have to learn the hard way.

I think I have too little patience to try and change amps with all the mods they have out there. There's always that risk that you'll screw up your amp, and end up with a lot of money and time wasted. I guess it's a good learning experience to spend time inside the circuits, rewiring everything. At least you're proficient enough to have put it all back to stock. I'd probably freak out and hope for the best, trying to get it all back together.

since Princetons are fixed bias, I think the trick is to use the right tubes for your style, and really dial in the bias.
(I also found out the hard way)


Originally Posted by Curlysince Princetons are fixed bias, I think the trick is to use the right tubes for your style, and really dial in the bias.
(I also found out the hard way)

Torres now offers a ajustable bias mod for Princeton's I think
he can Keep it !! That's the point of my rant, Dan Torres has to know
his pre-CBS mod is OVERKILL in a Princeton,But he still list it as one of
the amps that will bennefit from it? He even says it will make your Black
face amp sound better I get my Tubes from Dougstubes.com
I let him know it's for a princeton and i think he pulls me the right pair
for that amp (JJ 6V6) I highly recomend him for tubes. I don't think I'll
be doing much Biz with Mr. Torres anymore. Much better dealing with
Hoffman amps.