Chadnliz,
My 4004's right channel recently went out but it wasn't preceded by any noises. It turned out to be leaking capacitors in the power supply. I decided to buy a new amp because my 4004 is about 23yrs old, who knows what else is about to go. I think replacing the caps should be done whether it's the problem or not just as a precaution.
If you have a good local repair shop/technician and you have the original 4004 (non MKII), you could have them do an upgrade to MKII status. I was considering doing this but didn't due to my amp's age. I have a website (www.hbassociates.us-004mkIIUpgrade.pdf) that has the instructions and parts list for the upgrade. I think the original MKII upgrade was initiated by Aragon due to some resistors being flammable. Hope this helps.
My 4004's right channel recently went out but it wasn't preceded by any noises. It turned out to be leaking capacitors in the power supply. I decided to buy a new amp because my 4004 is about 23yrs old, who knows what else is about to go. I think replacing the caps should be done whether it's the problem or not just as a precaution.
If you have a good local repair shop/technician and you have the original 4004 (non MKII), you could have them do an upgrade to MKII status. I was considering doing this but didn't due to my amp's age. I have a website (www.hbassociates.us-004mkIIUpgrade.pdf) that has the instructions and parts list for the upgrade. I think the original MKII upgrade was initiated by Aragon due to some resistors being flammable. Hope this helps.