The sunn Forum

Sunn Musical Equipment => Q & A => Topic started by: BassHog on July 17, 2016, 09:13:56 pm

Title: Sunn Coliseum 300 bass amp schematic needed
Post by: BassHog on July 17, 2016, 09:13:56 pm

Title says it all, does anyone on the board have the full schematic for a Coliseum 300 bass head? I cannot find it anywhere on the internet.

Thanks for your help.

Title: Re: Sunn Coliseum 300 bass amp schematic needed
Post by: loudthud on July 18, 2016, 12:00:46 pm

There are two versions. The difference between them is the chip used for compression.

Title: Re: Sunn Coliseum 300 bass amp schematic needed
Post by: BassHog on July 18, 2016, 01:13:50 pm

Do you know which IC number that is? I can easily go look since the boards are out of the amp right now.
Or if you just want to send both I'll take them and figure it out.

Please email to darkartsamplification@yahoo.com if you have them.

I have one that is seriously blown up with many burnt parts on the pre-amp board that I need to get correct values for.
Not sure how this guy blew this up so completely but I'm suspecting he took the output from a rackmount power amp and fed it into one of the in/out jacks on the back. Ground plane traces burnt off the boards and everything.

Title: Re: Sunn Coliseum 300 bass amp schematic needed
Post by: BassHog on July 23, 2016, 03:32:17 pm

So anyone have this schematic? Still have not found a copy.

Title: Re: Sunn Coliseum 300 bass amp schematic needed
Post by: BassHog on July 24, 2016, 11:26:05 pm

Finally found the schematic. I uploaded it to Prowess if anyone else needs it.

http://www.prowessamplifiers.com/schematics/sunn/Coliseum_300_Bass.html