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JMP Combo speakers


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6/16/2000 2:03 PM
Chris JMP Combo speakers
Just found a 70's JMP 50 Mk II combo that sounds simply awesome - loud and toneful. I'm seriously thinking of buying it since portability is becoming an issue for me! My question concerns the speakers; it has 2x12 that have a 'Marshall' transfer stuck to the magnet. Any ideas what these speakers may be, given the approximate year of production for the amp (about '75-'79)?  
 
Many Thanks  
 
Chris
 
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6/16/2000 2:12 PM
Tim Swartz

I've seen 2 different Celestion speakers in these...They put regular 1221 25w greenbacks (Marshall label)in them until about '79, then went to 65w for the remaining 2 years. The 65w are as you describe, silver w/ no magnet cover and a Marshall sticker on the magnet. If they have a small round screen (3/4") in the middle of the magnet, that would further confirm that they are the 65w.  
 
Tim
 
6/16/2000 2:20 PM
Chris
Many thanks Tim. This combo had the later of the two speaker types you described. Do you rate these combos?  
 
Chris
 
6/16/2000 4:00 PM
Liam

Don't know what Tim thinks, but I reckon the Mk 2 combos are fab. You'll find a switch to earlier (or reissue) speakers will soften the sound up a lot though. They can be a bit harsh with the later ones. Is it the master volume or the ordinary model?  
 
Liam
 
6/16/2000 4:21 PM
Tim Swartz

I give high marks to both the amp (90% seem to be the 2 input master...combo version of a 2104), and the 65w speakers. I've had them with both varieties of speakers, in fact I've had a beater with the 25s for a very long time. The 65w speakers are very warm sounding...very much like a greenback in the mids and top, but with better low end definition...And you don't have to worry as much about cooking them.  
 
Tim
 
6/16/2000 4:24 PM
Rebel420

I have an early JCM800 Cab with the 65Watt/15ohm jobs, and I have mixed feelings about them. They are one of he soother sounding high-wattage celestion Igive you that, but they don have that same bark as the old greenbacks do. Debatin on either selling the cab and getting an older cab, or re-speakering the cab... problem is, thing is just TOOO f$*&% heavy to ship, and in my area, the only 4-12 cabw people want are the MesaBoogie cabs sine they match their grungemaster dual/triple recto head
 
6/16/2000 5:27 PM
Tonefactor

quote:
"The 65w speakers are very warm sounding...very much like a greenback in the mids and top, but with better low end definition...And you don't have to worry as much about cooking them."
 
 
I agree, these are excellent sounding speakers. I think the 25 watters sound kind of weak in an open back cabinet.
 

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