2. amps-preamps
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Mapletree Ultra 4A SE - mods

Any thoughts on replacing the stock PS to preamp umbilical cable with a better one? Revelation Audio's product (silver wire) is well known to improve the Mapletree's sound, but my DIY instincts are strong. Has anyone tried to used different wires and what was the end result? BTW, what is a good source for teflon shielded cryo silver wire?

2nd mod, how about bypassing the channel level controls? Don't need them nor use them. Easy mod to implement and reverse. Wondering if the sound would improve by removing this pot from the signal path.

Regards,
alex333
rockadanny
1,221 posts
 
bypassing the channel level controls?

I wouldn't. Have you tested your channels individually at your listening seat? I tested mine (250Hz; 500Hz; 1kHz) and discovered that the left channel was off by -3dB from the right. Why? Perhaps my room (asymmetrical, different openings left/right side)? Or tubes? Not sure, but am glad I discovered this. And glad I have the individual channel levels on my Mapletree Audio 2A SE Linestage to correct.

You may wish to check this out as well.
alex333 OP
38 posts
 
Rockadanny, I have channel level control on the MC7200, so I can handle any differences in output that way. Actually, I'll be checking that now that you mentioned it, hadn't thought about it before, and I know for a fact the room is acoustically a disaster.

Re the umbilical cable, I've read and been told by multiple owners of the Mapletree that it makes a big difference in sound. The stock one is lamp wire, and going to silver is a good improvement. I've found VH Audio sells the silver wire, but I'm wondering if there are other sources I've missed.
icorem
149 posts
 
why dont you consult the good doctor?
I'm sure he will be glad to assist with improvements.
alex333 OP
38 posts
 
Update, took the channel level controls (pots) out of the audio path. Result: noticeable improvement in overall sound.
rockadanny
1,221 posts
 
Dag! I wish you hadn't said that. Now my upgrade wheels are churning ... and just when I thought I was finally done!

Can you describe the improvements a little more please?
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