This is what Marshall say about the Studio JTM 1x12 Cabinet:

ST112

The ST112 brings the iconic tone that sprung Marshall to the forefront of rock ’n’ roll in the 60s to today. This 1x12" cab has been designed to be paired with the ST20H to create a small but perfectly formed vintage rig, or used as an extension cab for the ST20C. It is handmade in the same UK factory that has been manufacturing Marshall amps since the late 60s, built on decades of experience with expert craftsmanship at the very heart. The smaller scale of the ST112 gives players the power of the authentic Marshall tone, in a more compact design. With Creamback Celestion speakers, this cab offers that definitive vintage tone. 

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