Product Overview

The Definitive Sound of Vintage Mid-50s Tweed Rock & Blues

No amplifier line carries the organic mojo, touch-sensitive compression, and gritty historical authority quite like the American tweed amps of the 1950s. Among them, the small-box 1955 deluxe tube combo stands as an absolute studio king, used on countless hits by legendary artists like Neil Young, The Eagles, Keith Richards, and ZZ Top. The Universal Audio UAFX Woodrow '55 Instrument Amplifier packs the full heat, sag, and sonic personality of that legendary tube circuit inside a road-ready stereo stompbox.

Instead of running thin, static digital snapshots, the Woodrow '55 uses Universal Audio’s proprietary dual-processor architecture to emulate the complex physical behavior of every tube, transformer, and capacitor in the circuit. When you turn up the gain, it doesn't just sound louder—it sags, compresses, and blooms exactly like a real vintage amp head operating at its absolute sweet spot.

Product Description

Three Decades of Custom Preamp Boosts & Circuit Modifications:

The original 1955 tweed circuit is celebrated for its simple but highly expressive layout. To expand on this classic architecture, the Woodrow '55 integrates three iconic booster circuits on its Bonus toggle switch, allowing you to push the virtual power section into glorious harmonic overdrive:

• Stock (Clean Boost): Keeps the circuit true to the original 1955 schematic, offering warm, punchy, glass-like cleans that gradually break up into an organic blues bark.

• KP-3D (Korg SDD-3000 Boost): Adds the legendary pre-delay preamp boost favored by world-class arena rock guitarists, introducing an articulate, modern mid-range definition and a pristine high-end edge.

• EP-III (Echoplex Tape Echo Preamp Boost): Engages the thick, highly coveted discrete solid-state preamp circuit of a vintage early-'70s tape delay. It colors your low frequencies with a fat, velvety warmth and adds compression for singing lead lines.

Masterfully Modeled Speaker Cabinets and Room Ambience:

The Woodrow '55 leverages UA’s physical microphone modeling derived from the acclaimed OX Amp Top Box to replicate 6 legendary speaker configurations. By capturing the precise phase alignment and natural acoustic air movement of real tracking rooms, the pedal bypasses the harshness of standard digital setups. From an original open-back 1x12 combo running a vintage Jensen P12R speaker to heavy-duty 4x12 extension stacks, the pedal gives you mix-ready, three-dimensional studio speaker tracking right out of the gate.

Advanced Stereo Operation and Mobile App Customization:

Built to meet the demands of modern studio recording layouts and live stage pedalboards, the Woodrow '55 features true stereo input and output connectivity. It supports the advanced 4-Cable Method, which lets you bypass your physical amplifier’s front-end preamp stage to insert the premium 1955 tweed voicing directly into your amp’s power section.

Equipped with a built-in Bluetooth engine, the Woodrow '55 pairs wirelessly with the UAFX mobile application (iOS/Android). The app serves as a deep control dashboard, enabling you to toggle between True and Buffered bypass trails, fine-tune secondary circuit values, customize the assignment of the dual footswitches, and instantly download exclusive artist presets created by top studio guitarists.

Key Features

• 1955 BLONDE TWEED EMULATION: Full component-level recreation of the legendary mid-50s American small-box tube combo amp celebrated for its organic, growling overdrive.

• THREE BUILT-IN PREAMP BOOSTS: Integrated models of the classic stock clean boost, KP-3D (SDD-3000), and EP-III tape echo preamps to drive the gain stage.

• TOUCH-SENSITIVE TUBE BEHAVIOR: Authentic emulation of power amp tube sag, transformer saturation, and physical bias compression based on your pick dynamics.

• 6 PREMIUM SPEAKER CABINETS: 6 curated cabinet and studio microphone setups capture the realistic acoustic width and phase alignment of an engineered room.

• TRUE STEREO IMAGING: Full stereo input and output ports for massive ambient tracking widths or complex multi-amp live rigs.

• 4-CABLE METHOD COMPATIBILITY: Easily integrate the pedal into your physical guitar amplifier's effects loop to replace its preamp section with vintage tweed mojo.

• BLUETOOTH UAFX APP CONTROL: Wirelessly adjust hidden internal schematic settings, tweak foot-switch behaviors, and store customized user presets via your smartphone.

Technical Specifications

What’s Included in the Box

• 1 x Universal Audio UAFX Woodrow '55 Instrument Amplifier Effects Stompbox

• 1 x Official Universal Audio Quick Start Setup Guide & Signal Routing Guide

• 1 x Factory Serial Registration Card & Official Universal Audio Hardware Warranty Card