Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by RUSHFANnLV, Oct 3, 2006.
I'm posting this for a friend on another forum. Direct outs???
American-market 100W Marshalls up until about 1980 had four speaker outputs. Don't know why they did and the rest of the world didn't, and I've never seen an 800 series with them...until now.
Actually it's a 79 JMP I believe. Thanks very much for the information.
what's that ampeg under that marshall?
Looks like a first-series V4 to me! Killer amp!
Hey guys, I'm the owner of the JMP in question here.
(Took me long enough to get registered, wouldn't accept hotmail or gmail )
Thanks for the help with the jacks, and you are correct, it's a V-4B , indeed a killer amp.
Isn't this site great man? You want real answers, you come here.
Quite a nice little site
as a proud owner and constant user of a 78 100w jmp 2203 myself, allow me to suggest a good use for those extra speaker jacks. have your trusted tech bypass that dodgy, transformer-risking impedance selector and wire the different output taps directly to the different jacks (label them, of course). that way, you'll have 1 16 ohm jack, 2 parallel jacks at 8 ohms (for 2 marshall cabs), and 1 4 ohm jack. boogie has done it this way for decades. and no, i don't think you can run different impedance cabs into the different impedance jacks at the same time.
Wow, that's a VERY cool idea. That would turn the back panel into a very user-friendly interface.