16-Channel LCR Summing Mixer & Monitor Controller for Universal Audio LA-610 Channel Strip Console

This unit is a dedicated Passive LCR summing and monitor control solution, designed specifically for tube consoles built around UA 610 channel-strips. It combines flexible analog summing with a precise, fully passive monitor controller in a single, studio-grade chassis.

Summing Section

• 16-channel summing input via DB-25 (D-sub)

• 8 × LCR mono pan switches for accurate Left / Center / Right placement

• 8-channel DB-25 (D-sub) direct outputs

• 8 × Direct switches for routing individual channels to the direct outputs

• -25dB passive summing circuit designed for UA 610 Preamp

This configuration allows flexible mono and LCR summing while maintaining full control over individual channel routing.

Monitor Controller Section

• 2 × Stereo (4 channels) XLR inputs (A / B)

• 2 × Stereo (4 channels) XLR outputs (A / B)

• 3-position rotary input selector

  • Input A

  • Mute

  • Input B

• 3-position rotary output selector

  • Output A

  • Mute

  • Output B

• A/B output switch for selecting or combining Output A and Output B

Level Control

• 21-step precision attenuator

• Attenuation range: –6 dB to –50 dB

• Ensures accurate, repeatable level control with excellent channel matching

Designed for engineers who require true analog summing, reliable monitoring, and seamless integration with UA 610–based tube consoles, this unit delivers clarity, precision, and classic workflow in a modern, compact format.