2. amps-preamps
  3. 161850-139155

Tube rolling with Quicksilver Mono 60s -- from KT77 to KT88? KT 120? etc.

Happy Turkey Day!  I have Quicksilver 60 Monos and I'm using Gold Lion KT77s. They sound great. The amp came with JJ KT88s and they were a bit bright/harsh. The GL 77s are better.

For variety's sake, I'm thinking of having another set to just try for variation. The monos can use KT77, KT90, KT88, KT120 or KT150 outputs.

I have heard the Gold Lion KT88s are great tubes, but I'd also be open to others (not more 77s, though).

Does anyone one have a sense of the kinds of sound changes might be brought by either KT90 or better KT88 or KT120 or KT150s?

If it matters, I'm using a QS Line stage and stand mount speakers, 8 ohm 87 db.

One thing I'm looking for (possibly) is a somewhat tighter bass, but I'd be open to hearing what other sonic changes might result from other tubes.

Thanks.

128x128hilde45
hilde45's avatar
hilde45 OP
4,928 posts
 
Thanks for the suggestion. It seems like you are saying to consider the preamp as an important factor. I agree. 
noromance's avatar
noromance
9,607 posts
 
Second new Tung Sol 7581A. They're my current tube in 2 sets of monoblocs.  I've also heard good things about new TS EL34B.
hilde45's avatar
hilde45 OP
4,928 posts
 
Not in my manual. Perhaps they're equivalent?
donvito
395 posts
 
No they are not! An equivalent tube to the 7581 is a KT66 or a 6LG type of tube!
pindac's avatar
pindac
2,537 posts
 
To adlib on the advice given,
The Person offering advice, is a very experienced owner of Tubes with access to Tubes from a Two Generation Collection.
This person has always been supportive to make Matched Tubes available for loan, and offered much valuable guidance.
The Person has been instrumental in helping others create a understanding of how Tube Rolling can influence their systems.

The advice made available to myself relating to my Monoblocks was to undertake the investigation to learn what was the best Input Valve configuration to get the best from the resident Output Valves.
This is what I did and it has proved so far to be a very economical approach, if the Pre Amp Purchase and Build is deducted from the £700

I felt more compelled to further investigate the Pre side of the System as a result of the impressive improvement to the Sound Quality being experienced 
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