Tag Archives: jtm-45

Marshall JTM-45 Reissue Modification – Part II

Amplifier Features, Amplifiers, , , , , , , ,

In part I of our Marshall JTM-45 transformation process, we installed a point-to-point board from Metropoulos Amplification and began to hear the positive results of our test Marshall as it came to new life.

Now, in Part II of our continued Marshall JTM-45 transformation, we move forward with two additional changes in addition to having the opportunity to compare the final results to an original 1964 badge-logo Marshall JTM-45. The two changes that we decided to perform were to swap out the stock output transformer to a Mercury Magnetics Axiom O45JT-C model as well as to upgrade the board’s capacitors to those made by SoZo Amplification. To say that we were excited as well as just plain curious about the final results, especially when we could now compare it to an original JTM-45— is an understatement.
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Mojave AmpWorks PeaceMaker and Plexi 45 amp heads

Amplifier Reviews, Amplifiers, , , , , , , , , ,

Most readers at this site understand I’m a big time “amp nut” – with a special love for old Marshalls in particular. Some readers have even complained, “Too much Marshall!” in terms of content and asked me to pay attention to some other amps out there.

Well, o.k., I’m going to move away from the Marshalls, but not too far for the moment as the Mojave AmpWorks Peacemaker and Plexi 45 certainly share the Marshall heritage – in the case of the Plexi 45, its circuit is as dead-on of a true JTM 45 clone as you’ll find in any new amp built today. The Peacemaker however, adds some twists to the legendary Marshall tone, which we’ll dig into shortly.
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