Evidence Audio ESP Right-Angle 1/4" Plug

Designed for players and builders who need maximum space efficiency and performance in the smallest possible footprint, the Evidence Audio ESP-RA series offers the most compact soldered right-angle connectors available for pedalboard patch cables, insert cables, expression pedals, and balanced signal routing.

The ESP-RA series includes four models: the ESP-RA-S (TS mono, 4mm), ESP-RA-L (TS mono, 5mm), ESP-RA-TRS (balanced/stereo, 5mm), and ESP-RA-TRS-DM (dual-mono, 2x4mm). Each connector was engineered with a singular goal: to sound demonstrably better than anything else in its class. The ultra-compact, pancake-style form factor allows pedals and switching systems to be placed extremely close together, making them ideal for dense pedalboards where traditional right-angle or straight plugs simply won't fit.

At the heart of all ESP-RA connectors are contact points machined from high-copper-content brass. The ESP-RA-TRS and ESP-RA-TRS-DM feature direct nickel plating for enhanced performance in balanced and dual-mono applications. Brass offers the appropriate hardness and strength required for a connector with very good conductivity to minimize distortions caused by the cable the plugs are used on. This material offers an ideal balance of conductivity, hardness, and strength, helping minimize signal distortion and preserving clarity and dynamics. The result is connectors that maintain tonal integrity while standing up to real-world use.

The patent-pending closure system is another key advantage shared across the series. Unlike traditional pancake plugs that require two screws, all ESP-RA connectors use a single-screw design with a latch mechanism. This reduces assembly time, simplifies re-termination, and allows for a smaller overall housing without sacrificing mechanical stability. The form factor is akin to a "pancake" style plug, with a patent-pending closure system that allows for the plug to be assembled with one screw instead of two.

Despite their compact size, these connectors are fully solderable and serviceable, making them an excellent choice for DIY builders, touring musicians, and professional pedalboard technicians who want longevity instead of disposable parts. The all-metal construction with black finish provides durability and a clean, professional appearance.

All ESP-RA connectors share the same ultra-compact housing dimensions: Width 15 mm, Height 23 mm, Depth 8 mm. No really...these fit EVERYTHING! The smallest on the market, they allow use with switching systems and pedals where the jacks are close together. Where straight plugs were needed with some switchers in the past, angled connectors may now be used instead, freeing up space behind the switcher on a pedalboard.

Recommended Cable Pairing:

The ESP-RA-S is optimized for 4.0 mm cables and works exceptionally well with Mogami W2314, Canare GS-4, or Evidence Audio Monorail, making it perfect for standard mono patch cable applications.

The ESP-RA-L is optimized for approximately 5.0 mm cable and works exceptionally well with Mogami W2319 or Van Damme Pro Patch, providing excellent strain relief and reliable solder joints for larger mono cables.

The ESP-RA-TRS is optimized for approximately 5.0 mm cable and works exceptionally well with Mogami W2552. This pairing provides excellent strain relief, reliable solder joints, and flexible routing for tight pedalboard layouts in balanced and stereo applications.

The ESP-RA-TRS-DM is optimized for two 4.0 mm cables side by side and works exceptionally well with dual Mogami W2528, dual Mogami W2314, or dual Canare GS-4. This configuration is perfect for insert cables, expression pedal connections, and other applications requiring separate send and return signals in a single TRS connection.

If you're building high-quality patch cables, insert cables, expression pedal connections, or balanced signal routing and need connectors that truly fit everywhere without compromising tone or durability, the Evidence Audio ESP-RA series is a proven, professional solution trusted by artists like David Gilmour, Steve Lukather, and Trey Anastasio.

Make: Evidence Audio
Series: ESP-RA (Evidence Solderable Pancake Right-Angle)
Models: ESP-RA-S (TS mono, 4mm), ESP-RA-L (TS mono, 5mm), ESP-RA-TRS (balanced/stereo, 5mm), ESP-RA-TRS-DM (dual-mono, 2x4mm)
Connector types: 1/4" TS (mono) / 1/4" TRS (stereo/balanced) / 1/4" TRS (dual-mono)
Design: Right-angle, ultra-compact pancake-style
Contact material: High-copper-content brass (with direct nickel plating for TRS models)
Closure system: Patent-pending single-screw design with latch
Housing dimensions: Width 15 mm, Height 23 mm, Depth 8 mm
Cable OD compatibility (ESP-RA-S): Approximately 4.0 mm
Cable OD compatibility (ESP-RA-L): Approximately 5.0 mm
Cable OD compatibility (ESP-RA-TRS): Approximately 5.0 mm
Cable OD compatibility (ESP-RA-TRS-DM): Two 4.0 mm cables side by side
Recommended cables (ESP-RA-S): Mogami W2314, Canare GS-4, Evidence Audio Monorail
Recommended cables (ESP-RA-L): Mogami W2319, Van Damme Pro Patch
Recommended cables (ESP-RA-TRS): Mogami W2552
Recommended cables (ESP-RA-TRS-DM): Dual Mogami W2528, dual Mogami W2314, dual Canare GS-4
Features: Solder tabs, serviceable, all-metal construction, black finish, most compact 1/4" right-angle connectors
Application: Patch cables, insert cables, expression pedals, balanced signal routing, tight pedalboard layouts, dual-mono TRS connections

Recommended Cable & Connector Pairings