The Harley Benton MiniStomp Deep Blue is a compact digital reverb pedal. Harley Benton describes it as a pedal that "packs a world of digital spaces into its tiny enclosure," with the maker's own words for its range: "From tight, focused pools to shimmering oceans, from bright-sounding tiled rooms to cavernous expanses"1. It is built for players who want reverb on a small board without a large enclosure or a deep menu system.
The pedal runs three reverb algorithms, Room, Spring and Shimmer, each chosen by its own switch rather than scrolled through on a screen. Harley Benton's pitch for the pedal is simple: "This reverb effect has everything you need, and nothing you don't"1.
The controls
The control set is minimal. A single Mix control handles mix, tone and decay, and three switches select the reverb type: room, spring and shimmer1. An on/off footswitch with a status LED shows when the effect is engaged1.
| Control | What it does |
|---|---|
| Mix control | Sets mix, tone and decay1 |
| Mode switches | Select Room, Spring or Shimmer1 |
| On/off switch | Engages the effect, with status LED display1 |
For players used to reverb pedals with separate knobs for level, tone and decay time, the single Mix control is the main difference here. Harley Benton has folded those functions into one knob, which keeps the enclosure small at the cost of independent adjustment1.
The three reverb algorithms
Harley Benton says "Three different algorithms are at your command: Room, Spring and Shimmer, each with a unique sonic footprint"1. In practical terms:
- Room: the maker's description of "bright-sounding tiled rooms" points at shorter, tighter spaces1
- Spring: emulates the spring reverb tanks found in many guitar amplifiers
- Shimmer: the "shimmering oceans" end of the maker's description, the ambient, expansive option1
Because each mode has its own switch, switching between them is direct rather than a matter of stepping through modes in order1.
Power and size
The Deep Blue takes its power from a 9V DC mains adapter with the negative pole inside the barrel, and the adapter is not included with the pedal1. Current consumption is 20 mA1, low enough that it places little demand on a shared pedalboard supply. There is no battery option listed.
The enclosure is a solid metal housing measuring 92 x 38 x 32 mm and weighing 133 g1. That footprint is the MiniStomp format's main selling point: it fits where a standard size pedal would not.
The adapter is not included in delivery, and the pedal has no listed battery option, so a 9V DC center negative supply is needed from day one1.
Where it sits in the MiniStomp range
The Deep Blue shares its format with other MiniStomp pedals, including the MiniStomp The Deep, a 5-band bass EQ aimed at bass players. The two pedals have the same 92 x 38 x 32 mm dimensions and the same solid metal housing, and both are true bypass12.
The comparison shows the range's philosophy: one small enclosure, one job per pedal. Where the Deep gives bassists five EQ bands with plus or minus 18 dB of cut or boost31, the Deep Blue gives guitarists three reverb types. RockBoard's PedalPedia entry on The Deep notes its Level control "is always handy to have in your signal chain"3, a convenience the Deep Blue's single Mix control does not offer in the same way.
Questions
Is the Harley Benton MiniStomp Deep Blue true bypass?
Yes. Harley Benton lists true bypass among the pedal's features, so the signal passes around the circuit when the pedal is switched off. The on/off footswitch has a status LED that shows whether the effect is active.
What power supply does the MiniStomp Deep Blue need?
It runs on a 9V DC mains adapter with center negative polarity, drawing 20 mA. The adapter is not included with the pedal, so you need to supply your own. Any standard 9V center negative pedal power supply meets the requirement.
Does the Deep Blue take a battery?
No. Harley Benton specifies power only via a 9V DC mains adapter with negative center polarity, and no battery option is listed. Plan on a pedalboard power supply or a separate adapter.
How big is the Harley Benton MiniStomp Deep Blue?
It measures 92 x 38 x 32 mm and weighs 133 g, in a solid metal housing. That is small enough to slot into a crowded pedalboard where a full size reverb would not fit.
What reverb modes does the Deep Blue have?
Three algorithms: Room, Spring and Shimmer, each selected by its own switch. Harley Benton describes them as each having a unique sonic footprint, covering spaces from tight rooms to shimmering expanses.
Sources (3)
- MiniStomp Deep Blue, Harley Benton
- MiniStomp The Deep, Harley Benton
- MiniStomp The Deep by Harley Benton, RockBoard PedalPedia, 2026

