Signal Processors

If you’re a fan of early 1970s guitar tones, this evamp of the classic Colorsound Power Boost pedal might be one you’ll enjoy...

The Electro‑Harmonix Memory Man is one of the longest‑running and most popular analogue delay pedals around and...

These valve‑based pedals offer DSP speaker emulation, USB audio interfacing and comprehensive EQ.

It may be super-compact, but the MX5 punches well above its price tag. What’s not to like?

Blackstar Dept. 10 Boost is part of a series of pedals that use full‑voltage, dual‑triode valves to provide the touch responsiveness of a valve amplifier.

The Vibraslide is a genuinely unique and impressive take on the guitar sustainer concept.

Origin Effects' latest offering is inspired by the work of the backline technicians of the ’70s and ’80s who spent time modifying amps in search of new and exciting sounds.

Hotone believe you shouldn’t have to tweak a million virtual components to find a great guitar tone...

The Super Freq by Holy Island Audio is not for the subtle tone seeker, as it is wild and unruly — but in the most wonderful way!

Reactive load boxes that also offer top-quality speaker simulation have been seriously expensive — until now...

The 1973 version two Big Muff Pi — with a ram's head printed on the casework — was used on so many classic records that EHX have decided to bring it back.

These audio examples accompany our Kemper Profiler Stage review from SOS December 2019.

Kemper finally have a floorboard version of their groundbreaking Profiling Amplifier. Has it been worth the wait?

There are plenty of very heavily distorted examples already out there to be heard, but I’ve gone for some tones that I think challenge the technology a little more.

Widely touted as Boss's response to UA's popular OX, the Tube Amp Expander actually offers a contrasting approach. Will one of them be a clear winner?

The Gigboard crams the processing power of Headrush's flagship Pedalboard into a compact and easy to use format.

Don’t have a great-sounding room? Can’t turn your amp up to get the sounds you want? Want to turn down your speaker without sacrificing your tube amp’s tonality? Maybe this changes everything...

We’re used to seeing convolution technology in plug-ins, but recent years have seen this increasingly appearing in hardware form. DigiTech’s take on this is a compact stompbox-format dual-channel cabinet emulator.

Building on Avid’s Eleven Rack technology, this new hardware amp modeller promises to combine great sound with ease of use.

While an overdrive pedal might not seem like an obvious studio accessory I’ve often found that using an analogue overdrive pedal before a software modelling amp/speaker produces more musical results.

Expanding on the modelling technology used in their Variax and Variax Acoustic, Line 6 have dropped an octave and turned their attention to the bass guitar. The Variax Bass features 24 models of 'classic' instruments — is it all the bass you'll ever need?