What it does to your sound
RockBoard's PedalPedia says that by using new hardware it "not only created a very studio-like sounding delay, but we were able to increase the delay time to a maximum of 3 seconds"3. Pedal of the Day's verdict on the sound was that "the sound is solid as a rock", and the reviewer summed the pedal up as "a clean, straight-ahead, no-nonsense delay pedal"2. The pedal carries the usual delay controls: knobs to set the wet/dry mix, the number of repeats and the delay time, in Trevor Curwen's words for MusicRadar4.
Controls
| Control | What it does |
|---|---|
| Volume | Output level2 |
| Repeat | Number of repeats24 |
| Mix | Wet/dry mix24 |
| Tempo (Time) | Delay time24 |
| Subdivision switch | Quarter, triplet or dotted-eighth delay subdivisions2 |
| Tap Tempo footswitch | Hands-free delay time setting2 |
The Subdivision switch works with the tap tempo: T-Rex explains that tapping sets the delay time to 1/1, 2/3 or 3/4 of your foot taps, depending on the switch setting1. In practice that covers the quarter, triplet and dotted-eighth delay patterns gearnews.com lists among the pedal's options5. Pedal of the Day notes the dotted-eighth option is the sought-after one among the three2.
Size and stereo routing
Delicious Audio, announcing the pedal in March 2015, noted that "The Replay box is a horizontally set standard size stompbox, not the double wide you see in most delays"6. That compact footprint is part of the point: Pedal of the Day described it as extremely small yet powerful2, and the stereo jacks mean a player can run a full stereo rig through a single standard-size box, with each channel processed on its own1.
How it compares within the T-Rex range
Pedal of the Day places the Replay Box apart from T-Rex's other delays: "A different beast from the Replicator Junior or Reptile Modulation Delay from T-Rex"2. The T-Rex Replicator Junior is a tape echo, and the same review counts it among the reviewer's favorites: "The T-Rex Effects Replicator Junior Tape Echo was one of our favorite delays that has ever come through the office"2. The T-Rex Reptile 2 adds modulation to its delay, while the Replay Box stays deliberately straightforward2. Elsewhere in the range, the T-Rex Replica stereo delay pedal is the company's stereo take on its Replica delay, and the T-Rex Binson Echorec reproduces a magnetic drum echo. For more on the wider family, see the T-Rex brand page and the delay pedals type page.
What reviewers said
"an extremely small but wicked powerful straightforward delay"
Videos
T-Rex Effects
T-Rex Effects
Evert Zeevalkink
Questions
How long is the delay time on the T-Rex Replay Box?
The Replay Box offers up to 3 seconds of delay time. T-Rex says that by using new hardware it created a very studio-like sounding delay and was able to increase the delay time to a maximum of 3 seconds. Pedal of the Day's review likewise highlights what it calls the pedal's incredible three seconds of delay time, a figure that is generous for a pedal of this small size.
Does the T-Rex Replay Box have true stereo inputs and outputs?
Yes. T-Rex's product page lists separate input jacks for left and right and separate output jacks for left and right, and says the Replay Box features stereo in and outputs. Pedal of the Day's review goes further, saying the stereo inputs and outputs give you true stereo capabilities, with the DSP processing each side individually.
Does the Replay Box have tap tempo?
Yes. The Replay Box has a Tap Tempo footswitch that gives hands-free delay time setting, according to Pedal of the Day's review. A subdivision switch works alongside it, adjusting the delay time to 1/1, 2/3 or 3/4 of your foot taps depending on the switch setting, which T-Rex says covers quarter, triplet and dotted-eighth patterns.
What subdivisions does the Replay Box offer?
The Replay Box offers quarter, triplet and dotted-eighth delay subdivisions via its Subdivision switch, as described by Pedal of the Day. T-Rex explains the same thing in timing terms: the delay time adjusts to 1/1, 2/3 or 3/4 of your foot taps depending on the switch setting, so a tapped quarter note can become a triplet or a dotted eighth.
How is the Replay Box different from the T-Rex Replicator Junior?
Pedal of the Day calls the Replay Box a different beast from the Replicator Junior or Reptile Modulation Delay from T-Rex. The Replicator Junior is a tape echo, and the same review names it one of the favorite delays ever to come through the office. The Replay Box instead is a clean, straight-ahead, no-nonsense digital stereo delay in a small enclosure.
Sources (6)
- → T-REX EFFECTS ← Pedals for guitar and bass players!, T-Rex Effects
- T-Rex Effects Replay Box Stereo Delay, Pedal of the Day, 2019-07-26
- Replay Box by T-Rex, RockBoard PedalPedia, 2026
- T-Rex Replay Box review, MusicRadar, 2014-10-09
- Budget Delay Pedals: The Best Value Alternatives For You, gearnews.com, 2025-06-27
- New Pedals: T-Rex Replay Box, Delicious Audio, 2015-03-06
