Amalgam Captures – MRSH JT50 1967 NAM Core DI (WAV, NAM models)

By | July 20, 2026

 

Publisher: Amalgam Captures
Website: amalgamcaptures.com
Format: NAM, WAV
Quality: 24 bit · 48.0 kHz · mono

  • 24.7 MB

Description:
This is, without a doubt, the most iconic, musical, beautiful, and rare amplifier in our collection. This is an original 1967 MRSH amp, housed in an aluminum case and a transitional model from the JT45/JT50. It features the exact same circuit as the 1966 JT45, but is equipped with transformers later used in the JT50 Black Flag amps, as well as EL34 tubes, which were intended for those amps, instead of the KT66 tubes used in the JT45. So, it truly combines the best features of the JT45 style: a balanced, rounded, and rich tone that can be very smooth and mellow, with the powerful punch characteristic of EL34 amps, but without any of the harshness, coarseness, or hardness associated with some later EL34 amps.
With JT50-style transformers and EL34 tubes, the amp eliminates some of the fuzziness typical of JT45-style amps—bass sounds better, much more powerful and clear, and has more clean headroom and more comfortable crunch, even at maximum volume. On top of all this, it works even better with effects pedals than the JT45. Thanks to this rare combination of almost oxymoronic qualities and the extreme rarity of its specific circuit (it even retains the JT45’s filter capacitor values, while most JT50 amps have enhanced filtering), this is the first amp we’ve ever given a name to—we call it the Unicorn.
So, what does it sound like? Crank the treble control up to 6-7, and you’ll instantly get AC/DC Back in Black-style crunch with a humbucking guitar. Around that point, it’ll transport you and your Stratocaster to Hendrix country. Although Hendrix used 100-watt amps, this amp very well reproduces those powerful, rich, and full-bodied semi-clean tones for which Hendrix is ​​famous. Add fuzz, and the sound soars.
It’s hard to list all the users of this particular model, as it’s practically indistinguishable from others—outwardly, it looks like a regular JT45. However, the most legendary user of this era’s amp is Angus Young, best known for his recordings of the album Back in Black, whose sound is truly distinct from the typical JT45. You can get the sounds typical of JMP basses, in the style of Duane Allman, as well as powerful semi-clean and overdriven tones in the style of Hendrix.
We recommend testing it with your favorite analog or digital fuzz, boost, and overdrive pedals—it handles them all with flying colors.

SPECIFICATIONS:
– 2xEL34
– 3x12AX7
– 1x GZ34
– Fixed bias
– Negative feedback loop
– 50W output


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