Have a session 400
....it started having an overdrive sound. real muddy not the cables or effects removed from chain tried other instruments....still the fuzzy sound ....not clean sounding....what are the most common issues with these amps....could it be as simple as the speaker or something more serious.....thanks alll
Sean
Mullen Prp ,Sho-Bud Pro II custom, sarno black box,belton brick reverb,goodrich,hilton VPs,session 400 profexII
Could be just about anything.
I'm an EE and statistically it goes like this in order of likely hood.
1. connections, ie solder joints, connector interfaces, socketed components, etc.
solutions: look for bad solder joints - most often visible. Push integrated circuits back down into their sockets - sometimes they drift out. Unplug connectors, burnish or clean contacts and plug back in.
2. electrolytic capacitors dry up and go bad.
solution- replace
3. component failure.
solution- will require some EE smartz and equipent to debug.
I've fixed many a modern amp, post ROHS, just by re-soldering every connection of the PCB. (lead is bad for people but generally good for solder joints)
If it has a BW speaker, it could foam dust in the air gap around the voice coil. Do a search for that here on the fourm and you will find several post about this problem and how to clean it out.
It costs $0.00 and might fix it.
JE:-)>
Emmons D10PP 8/4 -75'
Emmons S-10PP 3/4 - 79'
Emmons S-12PP 3/4 -78'
MSA Legend SD12 5/5 -06'
Mullen S-12 4/5 - 1986
Nashville 112 x2 W/Knob Guards - Don't leave home with out one!
Walker SS rack system - 12"BW's
Quilter Steelaire Combo
