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Universal Audio UAFX Woodrow '55 Instrument Amp Pedal

Raw '50s "tweed" amp tone, in a box! Stereo amp/cab emulation pedal with room modelling, built-in boosts, live/preset modes & more!



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Product Description

In 2021, music hardware/software experts Universal Audio launched their first line of guitar effects pedals — aptly-named the UAFX series! Bringing the same class-leading innovation and ease-of-use of its pro audio products to a tactile, plug-and-play stompbox format — the forward-thinking brand has now expanded its UAFX range with three "amp-in-a-box" pedals based on iconic, vintage tone machines from the '50s and '60s.

The UAFX Woodrow '55 Instrument amp pedal emulates the nostalgic, American "tweed" valve amp sounds used by artists and producers for decades — from The Eagles, to Chuck Berry and Neil Young. Built on powerful dual-engine processing and acclaimed UAD modelling, the Woodrow '55 packs vibrant cleans, rich overdrive, and grungy distortion into a compact unit that easily fits on your pedalboard!

Key Features

  • UAFX dual-engine provides the most convincing mid-'50s American valve combo sound ever placed into a stompbox!
  • Includes the world's best speaker cabinet, mic, and room tones — derived from the award-winning OX Amp Top Box.
  • Features "hot rod" boosts, classic speaker swaps, plus free additional downloadable cabs and mics upon registration.
  • Bypass cabinet/mic emulations and use in front of your amp like a conventional pedal, for added tonal flavour and overdrive sounds.
  • UAFX mobile app lets you customise footswitches, recall and archive your presets, unlock additional features, download artist presets, and more!
  • Timeless UA design and craftsmanship, built to last decades.

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Vintage Tube Amp Growl for the Stage & Studio

The small, lightweight UAFX Woodrow '55 pedal serves up the inspiring and record-ready sounds of an expertly-captured tweed tube amp within seconds. It's incredibly convincing tones make it more than capable of replacing your cumbersome amp rig — letting you connect to a front-of-house system for live performance, or record tracks direct to your studio's DAW.

A Hot-Rodded Amp on Your Pedalboard

Take your raunchy tweed tones to the limit using tried-and-true British speaker swaps and boosts — including preamps from the iconic KORG SDD-3000 rack unit and Maestro EP-3 tape delay — at just the flick of a switch!

Custom Mic & Speaker Pairings

Tweak your sound with various classic microphone and speaker combinations, derived from Universal Audio's award-winning OX Amp Top Box:

  • BLU15: 12" 15W Celestion Blue
  • JP12: Stock 12" Jensen P12R
  • GB25: 12" 25W Celestion Greenback

Free additional speaker cabinet models (accessible via the UAFX Control app):

  • Marshall 4x12" with Celestion V30 speakers
  • Fender 4x10" Bassman cab with Jensen P10R speakers
  • Fender 1x12" cab with vintage JBL D-120F speaker

* Product names used herein are trademarks of their respective owners, which are in no way affiliated with Universal Audio Inc. These name(s) are used solely to identify products studied in the creation of the sound models found in Woodrow '55 Instrument Amplifier.

UAFX App: Customise to your Heart's Content!

Get the most out of the Woodrow '55 pedal with the UAFX Control mobile app. Download custom artist tones, recall and archive your presets, and delve into the tweed amp that started it all.


  • Power requirements: Isolated 9V DC, centre negative, 400 mA minimum (PSU sold separately)
  • Inputs: 2 x ¼" TS (right input for stereo connections and 4-cable mode)
  • Outputs: 2 x ¼" TS (right output for stereo connections and 4-cable mode)
  • USB Type-C for updates via computer
  • Height: 2.56" (6.5 cm)
  • Width: 3.62" (9.2 cm)
  • Depth: 5.55" (14.1 cm)
  • Weight: 1.24 lbs (0.567 kg)
Elliot Stent author picture

Written by Elliot Stent

Customer Reviews


5 reviews





Trusted Customer16th Dec 2023

This box is digital, but it feels like they’ve put so much attention into this that a bit of magic has happened. Its as close as you can get to a Baileys without getting your eyes wet.

Value 5Looks 5Durability 5Sound 5

Trusted Customer18th Jan 2023

Amazing - best digital version of an amp I’ve heard. Guitar to amp interaction is huge. I think it may be the modelled speakers vs IRS The app and Bluetooth integration is poor. However it’s the best valve amp in a box I’ve heard

Value 3Looks 4Durability 4Sound 5

Mr Kevin Wright12th Jul 2022

Believe the hype! This is exactly what I've been waiting for - something which feels and sounds exactly like an old valve amp in a tiny box. Previously I've owned an Ampli-firebox (sounded ok but totally unreliable) and an HX Stomp (far more features than I needed and always sounded like playing through a studio rather than an amp) but this has all I need - two channels (live + preset) each with a boost. Nothing else I've tried so far has been able to really match that valve amp on the edge of breakup sound where a gently played chord is both sparkly, warm & clean and then chewy and dirty as you dig in and then seriously filthy as you push it with one of the boosts. Having just six excellent speakers to choose from is far better than an infinite number of questionable IRs and all of the UA speakers sound fantastic. The only issue I can see with this pedal is that sooner or later you're going to want to but one of the other flavours!

Value 5Looks 5Durability 5Sound 5

Mr Andrew Cherry3rd Jul 2022

Superb pedal. High quality build and excellent sound.

Value 4Looks 5Durability 4Sound 5

Trusted Customer19th Jun 2022

Value 5Looks 4Durability 4

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.