Mr. Black Pana-Trem

The Mr. Black Pana-Trem is a true-stereo harmonic tremolo and panner pedal, offering standard and panning modes of operation in one compact box¹. Where a conventional tremolo pedal simply raises and lowers the volume of your signal, the Pana-Trem can also bounce the sound between two amps in ping-pong fashion, and its Shift control lets you tune the character of the effect anywhere between standard tremolo and harmonic vibrato¹.

MusicRadar's Trevor Curwen describes it as "a twin-footswitch true-stereo harmonic tremolo and panner," priced at £249 in the UK². Delicious Audio, covering the pedal in 2018, called it "a Stereo Tremolo & harmonic vibrato with a bunch of trick up its sleeve"³.

A stereo harmonic tremolo and panner

The core of the pedal is a true-stereo circuit with two fully independent audio paths¹. That architecture is what makes the Panner mode possible: instead of both channels fading together, the effect can move the sound between the left and right outputs, ping-pong style¹.

The two modes of operation are:

• Pulser: standard tremolo, the familiar rise and fall of volume¹
• Panner: ping-pong tremolo, bouncing the signal across the stereo field¹

The Shift control is the tonal heart of the pedal. Mr Black describes it as giving "Standard Tremolo & Harmonic Vibrato as well as all shades in between tuned to user taste"¹. In practice, that means you can dial in a classic amplitude tremolo, a harmonic vibrato in the style of the vintage brown-panel amps, or any blend of the two, and the pedal holds that setting wherever you leave the knob.

Each channel also carries a specially tuned "Sweet'ner" pre-amp, which conditions the signal in each independent audio path as it passes through the effect¹.

The controls: Shift, modes and presets

Beyond the Shift control, the Pana-Trem stores one preset. A preset is saved by pressing the Save button, and activated or deactivated by holding the Tap-Tempo/Preset footswitch¹. Delicious Audio's 2018 coverage noted the same scheme, with the preset recall triggered by the footswitch on the right³.

For 2026, Mr Black lists two updates to the pedal:

• Brighter LEDs¹
• Soft touch footswitches¹

Mr Black also sells B-stock units. While B-stock units have minor cosmetic defects, the internal components are the same as a standard pedal⁴.

Tap tempo and expression

The 2026 pedal's new soft-touch tap-tempo footswitch extends the LFO out to 30 seconds¹, which covers everything from fast chop to very slow, ambient swells.

Units with a "TAP/EXP" input also accept an external tap-tempo switch: use a Normally Open momentary contact switch which grounds tip to sleeve, connected with a normal 1/4" patch cable¹.

Expression control is unusually flexible. Any standard expression pedal can be assigned to any, or all, of the control knobs on the fly: connect the pedal to the EXP jack, then turn the desired control to the blue dot to assign it¹. That means you could sweep the Shift control from tremolo to harmonic vibrato mid-song, or ride the speed knob with your foot, without bending down to re-patch anything.

Power: 9V, about 69mA

The Pana-Trem runs on industry standard 9VDC power that Mr Black describes as pedal-board and daisy chain friendly, with a current draw of about 69mA¹. That draw is modest enough that the pedal shares comfortably with other 9V effects on a typical isolated or daisy-chain supply, and no special high-current output is needed.

Size and board placement

The enclosure measures 3.7" x 4.7", a compact footprint for a twin-footswitch stereo pedal¹. Delicious Audio highlighted the same compact design in its 2018 coverage³, and the dimensions are unchanged on the current version.

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