STA-1M

RDL STA-1M - Audio Line Amplifier - Mono: -14 to +14 dB Gain

The RDL STA-1M is a professional single-channel line-level amplifier designed for precise audio level matching, impedance conversion, and ground isolation. It supports conversion between balanced and unbalanced formats and between high and low impedance, making it a versatile solution in AV installations.

The input stage is designed to amplify differential signals regardless of ground reference, effectively eliminating ground loop interference. The STA-1M can bridge an audio line without loading the source, and its output can drive both high- and low-impedance loads, in either balanced or unbalanced configuration.

Gain is adjustable from -14 dB to +14 dB. With RDL’s SupplyFlex™ power input configuration, the STA-1M can be powered from a ground-referenced or isolated 24 V DC source, or from bipolar ±12 V DC or ±15 V DC power supplies.

Functionality

• Adjustable gain from -14 dB to +14 dB
• Converts audio: unbalanced ↔ balanced
• Impedance conversion: high ↔ low
• Bridges audio lines without loading the source
• Ground loop isolation
• Flexible DC power input options via SupplyFlex™

Features

• Single-channel line-level amplifier
• Supports balanced and unbalanced I/O
• Input designed to reject ground-related interference
• Output drives high or low impedance loads
• Power options: 24 V DC (ground-referenced or isolated), ±12 V DC, ±15 V DC
• Compact design for installation environments

RDL STA-1M is a dependable solution for AV integrators needing flexible and precise audio signal conversion, level matching, and noise isolation in professional systems.