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Mac MC240

Dear experts,

I'm going to get a MC240 which I have been looking for a long time :). I'd like to ask your expertise...
1. What is the small switch at the front bottom next to the power cord used for?
2. For the small tubes (12ax7, au7 and bh7), what's your favourite combination of brands?
3. What's your favourite speaker cable to match this amp?

Thanks.
eugeneli

Showing 2 responses by jsujo

jsujo
348 posts
 
I have GE grey plate for the 12BH7, Sylvania is one pair of of 12AX7, the other is Tungsram, the 12 AU7's are RCA clear tops, and the output tubes 6L6GC are mundane made in USSR tubes...

I would say that I didnt hear that much difference rolling these signal tubes...I will try the latest Svetlana C wing for the output tubes..

I have MC40's.
jsujo
348 posts
 
I am kinda new at the tubes..but its funny, i find the amps as they are now, to be tremendous powerhouses throughout the freq range..again ,maybe ignorance is bliss in my case. Just cant spring for NOS tubes really.

Also,I double checked, and I dont have the RCA clear tops (differemt amps)...they are Sylvania also.

When i bought my amps, a McTech brought them up to specs. they are driving Tannoy System 12 DMTs thru a Berning TF-10 preamp/
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