The DigiTech RP155 is a guitar multi-effects floor processor that also works as a USB recording interface. DigiTech gives it 83 amps, cabinets, stompboxes and effects, up to 11 of which can run at once, alongside a 20-second phrase looper and a 60-pattern drum machine1. It sits in the middle of DigiTech's RP line of multi-effects pedals, below models like the RP255 and RP350 and above the budget RP55.
Recording over USB
The feature that sets the RP155 apart from a straightforward effects floor unit is its recording side. DigiTech describes it as a "Guitar Multi-Effects Processor & USB Recording Interface"1, meaning the same box that shapes your live tone can plug into a computer and serve as the sound card for recording. The connection is a USB Type B port supporting USB 2.0 Full Speed, and the audio path is specified at 24-bit high performance audio with a 44.1 kHz sample rate, processed by DigiTech's AudioDNA2 DSP processor1.
For a player recording at home, that means the guitar goes into the RP155, the RP155 goes into the computer over USB, and the amp and effects models are printed straight onto the track1.
Effects, presets, looper and drums
The RP155's effects library covers 83 amps, cabinets, stompboxes and effects, and a single preset can run 11 of them simultaneously1. Presets come in two banks of 50: 50 user presets, numbered 1 to 50, which you can overwrite with your own settings, and 50 factory presets, numbered 51 to 00, which restore the shipped sounds1.
Two extras round out the unit for practice and songwriting:
- Phrase looper: 20 seconds of record time, enough to capture a riff or chord progression and play over it1
- Drum machine: 60 patterns to jam or write against1
DigiTech lists the RP155 among its past products: "Past products are no longer in production, but may still be available through local and online retailers"1. New units are a matter of remaining stock.
Where it sits in the RP line
Within DigiTech's RP line, the RP155 carries 100 presets in total, split evenly between 50 User Presets (numbered 1 to 50) and 50 Factory Presets (numbered 51 to 00)1. That split matters in practice: the factory presets give a player a starting point across styles, while the user slots hold the player's own edited sounds, and the two banks sit side by side in the numbering rather than in separate modes.
Videos
ralfjung
Richard Webner
ralfjung
Questions
Is the DigiTech RP155 still in production?
No. DigiTech lists the RP155 among its past products, which are no longer in production, though the company notes they may still be available through local and online retailers. If you are shopping for one, that means looking at remaining stock rather than new production.
How many effects can the DigiTech RP155 run at once?
The RP155 can run 11 simultaneous effects, according to DigiTech. Its library covers 83 amps, cabinets, stompboxes and effects in total, so a preset can combine amp, cabinet and stompbox models alongside modulation, delay and reverb type effects at the same time.
How long is the RP155 looper?
The RP155's phrase looper offers 20 seconds of record time, per DigiTech's product page. That is enough for a short riff or chord progression to practice over, and it is shorter than the 40-second looper DigiTech later put in the RP360 and RP360 XP.
Can the RP155 be used as a USB audio interface?
Yes. DigiTech describes the RP155 as a guitar multi-effects processor and USB recording interface. It connects over a USB Type B port supporting USB 2.0 Full Speed, and runs 24-bit high performance audio at a 44.1 kHz sample rate, so it can feed your computer directly for recording.
What comes in the box with the DigiTech RP155?
DigiTech's box contents list includes the RP155 guitar multi-effects processor and USB recording interface itself, a PS0913 power supply rated at 120 VAC, 60 Hz, and an owner's manual and warranty card. No other accessories are listed.
Sources (1)
- RP155 - DigiTech, DigiTech, 2023-12-20
