This amplifier borrows its features from the JTM50 from 1967 which started the rock era of Marshall amps. It was the first Marshall with EL34 power tubes, but with a rectifier tube for smacky response.
The JTM67 Mk III comes with a classic ECC83 preamp and as is standard on all Gladius amps, the unique GLADIVS output power control.
Only absolute state of the art components are used along with being hand-wired and utilizing the best possible tubes. An indispensable extra feature is the channel-patch, which switches both channels together without having to use the conventional patch cable.