Urei LA3A x2

Used Optical Compressors from Urei. See pictures for condition. 6 month warranty,

Classic Solid-State Optical Compressors for Studio Use

The UREI LA-3A is a solid-state optical compressor introduced in 1969, designed by Brad Plunkett. It combines design elements from both the LA-2A and the 1176LN, resulting in a unit known for its distinctive character, simple operation, and fast response. Using the T4B optical cell, the LA-3A features automatic attack and release times that vary depending on signal strength.

Responsive Compression with Simple Controls

Optical Circuit with Transistor-Based Design

Unlike the tube-based LA-2A, the LA-3A uses a solid-state design that delivers a different dynamic response—slower attack on low-level transients and faster attack on high-level ones. The T4B cell governs both the attack and release behaviors.

Minimal Controls for Quick Operation

The front panel features just two main controls: Gain and Peak Reduction. These adjust the output level and the amount of compression, making setup straightforward.

Flexible in Mixing and Tracking

Combines Concepts from LA-2A and 1176

Sharing components and design principles with both the LA-2A and 1176LN, the LA-3A delivers musical compression with fast attack, suitable for a wide range of sources.

Versatile Tone Shaping for Various Instruments

In addition to drums and percussion, the LA-3A is commonly used to enhance guitars, bass, and vocals—especially when working with dense arrangements or high-energy genres like rock.

Specifications

• Type: Optical compressor with solid-state design
• Attack/Release: Automatic via T4B cell
• Controls: Gain, Peak Reduction
• Connections: XLR in/out (on 2005 reissue)
• Additional Features (2005 version):
• Comp/Limit switch
• IEC power connector
• Original Production Years: 1969–1981
• Reissued by Universal Audio: 2005 (UA Classics Series)