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.
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
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