Heritage Audio Baby RAM Passive Monitor Controller

The Heritage Audio Baby RAM is a fully passive monitor controller built around a zero-compromise signal path inspired by classic European console master sections. At its core is a 4-gang, 24-step rotary attenuator that maintains sub-tenth-of-a-dB stereo balance precision at every position—a meaningful engineering advantage over standard stereo potentiometers, which introduce channel imbalance as they age or wear. Because the Baby RAM is entirely passive, it requires no power supply and introduces less than 0.2 dB of insertion loss, keeping the signal path between source and monitors as intact as possible. Two balanced, ground-free stereo input and output pairs on gold-plated TRS jacks, combined with Mute, Dim, and Mono controls, cover the essential monitoring workflow without unnecessary complexity.

Key Features

• Fully passive circuit — no power supply required; no active components in the signal path to add noise or coloration
• 24-step rotary attenuator — 4-gang design in 3 dB steps maintains sub-tenth-of-a-dB left/right precision at every position
• Less than 0.2 dB insertion loss — negligible signal loss at any attenuation setting
• Two stereo input pairs, two stereo output pairs — balanced and ground-free on gold-plated TRS jacks; unbalanced compatible
• Mute, Dim, and Mono controls — essential monitoring functions in a streamlined, uncluttered control set
• No added distortion or noise — passive design adds nothing to the signal beyond attenuation
• Unlimited headroom — as a passive device, headroom is determined solely by the connected source and destination equipment

Specifications

• Type: Fully passive monitor controller
• Inputs: 2 stereo pairs, balanced and ground-free, gold-plated TRS jacks (unbalanced compatible)
• Outputs: 2 stereo pairs, balanced and ground-free, gold-plated TRS jacks (unbalanced compatible)
• Volume Control: 24-step passive attenuator, 3 dB steps; sub-tenth dB left/right precision per position
• Insertion Loss: Less than 0.2 dB
• Mute Attenuation: Less than –100 dBu
• Distortion/Noise Added: None
• Headroom: Unlimited (passive; limited by source and destination devices)
• Power Supply: None required
• Controls: Volume (24-step rotary), Mute, Dim, Mono