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Audio Research Sp-6a-Should it be modified?

First, thanks for all the input. With your help, I have found an amazing repairperson, and will write about his work after the repair.

He said he could modify the pre-amp and bring it to current levels of performance.

What do you think? Should I have it modified or leave the circuits original? What do you recommend?

Regards,
Miles

Regards,
Miles
milesd77
philjolet's avatar
philjolet
2,306 posts
 
it depends on the price and the level of performance upgrade. The 6a is pretty good without an upgrade, maybe the money should be put elsewhere...
gmuffley
132 posts
 
The best bang for the buck, and relatively simple to do, would be to replace the Wondercap metalized coupling caps with higher quality caps.
stanwal's avatar
stanwal
3,147 posts
 
I would upgrade the parts but leave the circuit the same. The caps are old and much better ones are now available. Resistors have also improved. I would stick to original values for both. Modifications to the original circuit will produce a different sound than the original which you may or may not like better. The first approach is likely to give a significant improvement without altering the basic nature of the sound.
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