According to Dave Barber (Barber Electronics) the lows on the Origin 20 and Origin 50 are effected by using a microfarad 1 on the first cathode if you change it to a 10 or bit higher you get that 68 JMP 50 Plexi sound.
Check out YouTube
Hack Live with David Barber of Barber Electronics !
Sorry at present I can not download.
Check out the video at 1:01:32 for the mod.
Did this mod just now. Jury is still out.
ReplyDeleteHow did it sound? Any difference?
ReplyDeleteThanks for the post!
ReplyDeleteTried fiddling with different values on the aforementioned cap.
The Origin 50's 1nf cap on the first cathode is indeed a very small value compared to jtm and jmp 50watt circuits. So I settled on a 320uf cap. The sound is certainly fuller than before and it doesn't cut the bass from pedals such as the big muff, fuzz face etc. (I always though it restricted them ), plus when it goes into overdrive the sound is fuller. It didn't change the sound of the amp completely (I didn't expect it to in the first place ) but it lets more bass into the circuit and ups the gain a little bit, which in my opinion is an improvement. The downside is that the cleans are not as "sparkly" as before, since more bass frequencies enter the circuit now, but for me that's not a problem.
Cheers