Marshall model 1987 50w amp

1969 Marshall 1987 50w metal panel amp

General Information

This amp uses a pair of el34 output tubes, with 12ax7a tubes in the preamp. Called a 50w amp by Marshall, this amp evolved from the earlier Jtm45 amps. It uses a solid state rectifier, instead of the gz34 tube, found in jtm45 and jtm50(black flag) amps.
This amp has more bite than its early brothers, not being as smooth. Lack of a master volume means you need to crank up, for any grit. This alone causes grief for gigs, and at home. I suggest limiting speaker count, blocking baffles, distortion stomp boxes, even smaller output tubes(yellow jackets), for help with that volume issue. The amp performs at its best at full volume, or slightly less.
The 2 separate channels are voiced differently, 1 bright, 2 dark. That feature works wonders in giving you additional tonal flexibility.
The amp provides classic Marshall bark, which the company was built on. This particular amp has a standup mains transformer, similar in specification to the lay down mounted one, in earlier amps. Some people claim to hear a difference. It could be attributed to the orientation of the magnetic field, due to the differences of chassis mounting.
These amps were likely built around the Celestion greenback speakers. Pairing the amp with those speakers, will complete the classic experience.
If you like that sound, pony up ASAP. Prices are escalating as we speak. Yeah, it’s money in the bank, but the true reward is the TONE!!
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Pros: Classic Marshall Tones
Cons: Loud , hard to control...
I’ve spent most of my years around these amps. Love em despite their shortcomings. Fantastic tones!

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