Mooer A7

The Mooer A7 is a reverb pedal, described by Mooer as the "Ambience Reverb" and the first reverb pedal from The New Micro Series¹. It offers seven different reverb effects, which Mooer says cater to "the far-out guitar astronauts and the psychedelic"¹. Each effect has a storable preset, and the pedal wears a shimmering blue finish that Mooer says "adds a bit of sparkly flare to any pedal setup"¹.

For a player, that means a pedal the size of a matchbox that can cover everything from a plain room sound to drifting, experimental tails, with a knob dedicated to making those tails move in unpredictable ways²³⁴.

Seven reverb effects in a micro pedal

The A7's whole reason for being is variety in a tiny box. It carries seven different reverb effects, which Mooer characterizes as spanning classic to psychedelic¹, and Delicious Audio frames the same set as seven ambient and psychedelic reverbs to experiment with⁴. Each effect has its own storable preset, so the knob positions you settle on for a given mode are kept when you switch away and come back¹.

The A7 is the first reverb pedal from Mooer's New Micro Series, the line in which Mooer says its reverb effects "have been substantially upgraded"¹. It carries seven different reverb effects, running from classic to psychedelic, in a mini-pedal format⁵. Each of the seven effects has its own storable preset, so a player can save a setting for every mode¹.

The enclosure itself is part of the pitch: a shimmering blue finish that Mooer says adds sparkly flare to a pedal setup¹.

Controls: Mix, Decay, Tone, X and Chaos

The control set is small, five knobs, but each one earns its place²:

Gearnews describes the controls as limited to Mix, Decay, Tone, X (room size) and Chaos, with Chaos being a randomization control that adds unpredictable movement to the tail². Delicious Audio puts it more simply: "The Chaos knob adds a touch of unexpected to each mode"³. For ambient and shoegaze playing, that is the knob that separates the A7 from a plain multi-mode reverb, since it keeps long tails from sitting still.

Delicious Audio flagged the Chaos knob early in the pedal's life, writing of the A7 Ambiance⁴³:

Power and connections

The A7 runs on a 9V DC supply with internal negative external polarity, the standard center-negative arrangement, and Mooer recommends its own Micro Power supply¹. Current draw is 200mA¹, which is substantial for a pedal this small and rules out battery power.

Connections are mono throughout: one 1/4" mono input at 2.2M Ohms impedance and one 1/4" mono output at 100 Ohms impedance¹. Gearnews called out the trade-off directly in its ambient reverb roundup, noting "The obvious trade-off: mono only, no expression input"². Players who need stereo reverbs or want to sweep parameters with an expression pedal would need to look at larger units, such as Mooer's own R7 X2 with its stereo ins and outs.

The pedal supports both buffer bypass and true bypass¹, so you can set it to keep a clean signal path or to run buffered in a long chain. Delicious Audio's A7 Ambiance listing specified buffer bypass⁴, so the two sources describe the bypass differently and the switchable option on the unit itself settles it.

One forward-looking feature: the A7 is firmware updatable via USB¹, so Mooer can revise its behavior over the pedal's life.

Size and what reviewers made of it

The A7 measures 93.5mm deep by 42mm wide by 52mm high and weighs 155g¹, the classic Mooer micro footprint. That size is the point: it slots into gaps on a board where nothing else fits.

Gearnews, covering the A7 Ambiance and D7 at NAMM 2020, took a measured view of the value⁶:

Mooer gives the A7 a shimmering blue finish, which the maker says "also adds a bit of sparkly flare to any pedal setup"¹. The pedal ships with a User Manual covering its seven reverb effects and their storable presets¹.

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