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Mikeyboyeee
Well-known member
The x denotes reissue in this case. Do you mean original 1987 not reissue (s)?
Which capacitor?
Which capacitor?
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Nolly
Active member
You’re right, thanks for correcting me, anywhere I wrote “original 1987x” I was referring to the 1987.The x denotes reissue in this case. Do you mean original 1987 not reissue (s)?
Which capacitor?
It’s the first coupling capacitor on the bright channel. Original 1987 spec should be 2n2F but the reissue 1987x has a 22nF. Marshall have often done the same on their 1959 reissues too. Note there is some variation in these parts both on original 1987s and reportedly also some eras of reissue 1987x, so you’ll have to check and see.
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Mikeyboyeee
Well-known member
I believe they based the 1987x on a 1972 spec. Was the value different in 72?You’re right, thanks for correcting me, anywhere I wrote “original 1987x” I was referring to the 1987.
It’s the first coupling capacitor on the bright channel. Original 1987 spec should be 2n2F but the reissue 1987x has a 22nF. Marshall have often done the same on their 1959 reissues too. Note there is some variation in these parts both on original 1987s and reportedly also some eras of reissue 1987x, so you’ll have to check and see.
My 90s reissue should be here early next week for me to check.
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Nolly
Active member
I don’t believe the 1987 nor 1959 ever (intentionally) had 22nF couplers on the bright channel. The “1972 spec” probably refers to the voltages, bright cap value, lack of cathode bypass on 2nd gain stage, etc.I believe they based the 1987x on a 1972 spec. Was the value different in 72?
My 90s reissue should be here early next week for me to check.
As I say, I think Marshall intentionally made that change in coupling cap value when they designed the reissue amps to prevent users not running the amp at extreme volume complaining that the bright channel sounded thin.
Edit: or from another perspective, they did so to enable fuller sounding cleans on the bright channel, at the expense of losing tight gain at higher volume.
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Mikeyboyeee
Well-known member
If I were you I would just turn the preamp gain down and the master volume up on your 83 JMC800 SIR34 mod and use a Fryetter PS2 or PS100 powerstation ot Rivera Rockcrusher to shave off some 8-12DB's rather than buy a Reissue 1987X.
The 1987X's are alright if you find one priced right but I think you just need to tweak your 34 mod and enjoy what you got.
Can you plug into the low input on your SIR 34 Marshall?
If a 72 comes along that you want then jump on it then. I think you would be disappointed in a stock NVM Marshall after having what you have IMHO.
This is the answer BTW.
I've realized I like "more" than a stock NVM Marshall.
My 2203 basically covers same ground.
Off my 1987 kick and probably listing one soon lol.