The JMP 100 incorporates a cold-biased tube stage that clips signals, yielding a smooth overdrive tone, distinct from the JTM's classic circuit based on the Fender Bassman.

A mysterious footswitch feature is connected to a knob on the right, requiring exploration for full functionality.

The amp's master volume makes it easier to achieve Plexi tones at lower volumes, providing versatility for different musical styles.

The '67 JMP Superlead shares a "shared-cathode" circuit with the JTM100 and older Fender models, offering fuller sound with boomier low end and less gain than later iterations.

Some users claim the 1980 JMP may surpass the original JCM800 in sound quality, especially with greenbacks or T75 speakers.

The 2204 model is essentially the same as early JCM 800s, but owners prefer the older box design for aesthetics.

The '68 Plexi Superleads are noted for their brighter sound with more cut, making them ideal for band mixes and used by artists like ZZ Top and Eric Johnson.

The amp features push-pull pots for mids and treble, though users report they sound unpleasant when engaged.

An additional gain knob balances the sound by enhancing high frequencies when the preamp knob increases bass.

Swapping 6550 tubes to EL34s improves power tube overdrive, resulting in smoother tones, though it requires resistor changes.

Users favor pairing this amp with WHS Invader speakers for impressive sound quality.

The amp is praised for achieving Hendrix-like tones, especially when paired with a 4x12 or EVM 12L loaded 2x12 cabinet.

Owners use a Webber Mass 200w attenuator to manage volume effectively without sacrificing tone.

Prices for this model have surged post-COVID, with listings reaching $2800, though some owners believe values may eventually stabilize or drop slightly.