RDL ST-MA2 Mono Audio Amplifier with Muting

RDL ST-MA2 Mono Audio Amplifier with Muting

RDL ST-MA2 Mono Audio Amplifier with Muting


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Expected availability: 7-10 business days

Product Highlights

  • 2W, 8-Ohm Single-Speaker Amplifier
  • Conferencing Monitor Amplifier
  • Externally Actuated Attenuation Steps
  • Fast, Silent Audio Switching
  • Multiple Control Inputs
  • Adjustable Gain
  • A 24 VDC Power Supply is Required
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This item is noncancelable and nonreturnable.

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RDL ST-MA2 overview

  • 1Description

The ST-MA2 Mono Audio Amplifier with Muting from RDL is a miniature 2W, 8-Ohm amplifier module designed to drive a single small desktop or overhead-mounted speaker of up to 2W RMS. The ST-MA2 features adjustable gain and provisions for remote muting or attenuation. The amplifier is an ideal choice for boardroom meetings, courtroom proceedings, classrooms, lecture halls, and more.

The line-level input may be wired in a balanced or unbalanced configuration. The audio output will drive standard speakers from 4 to 45 Ohms. Normal gain is preset by means of a trimmer on the module. A 24 VDC power supply (sold separately) is required.

Amplifier and Remote Muting
The ST-MA2 is a miniature single monitor amplifier with remote muting capability.
Flexible Output
The audio output will drive standard speakers from 4 to 45 Ohms.
Gain Controls
Normal gain is adjusted with a recessed trim control dial.
Stick-On Adhesive
The durable bottom adhesive permits quick permanent or detachable mounting. The unit can also be rack-mounted with additional RDL accessories (sold separately).
UPC: 813721012159
In the Box
RDL ST-MA2 Mono Audio Amplifier with Muting
  • Limited 3-Year Warranty
  • Table of Contents
    • 1Description

    RDL ST-MA2 specs

    Input Impedance 20 kOhms Balanced or Unbalanced Bridging
    Input Level -10 dBV Minimum for 2 W RMS Output
    Output Impedance 8 Ohms (Will Drive 4 Ohms Loads)
    Output Power 1.75 W RMS Continuous
    2 W RMS Max.
    THD & Noise < 0.5%
    Bandwidth 45 Hz to 14 kHz
    Common Mode Rejection Ratio > 60 dB (50 Hz to 120 Hz)
    Residual Noise < -80 dB (Below 2 W RMS)
    Switching Time < 50 Ás
    Mute Attenuation > 90 dB (1 kHz)
    > 85 dB (300 Hz to 3 kHz)
    > 75 dB (20 Hz to 20 kHz)
    Attenuation Selectable: 3 dB or 6 dB, Each Setting Individually Selectable Using Two Independent Inputs (Connect to Ground to Activate, 0.3 mA)
    Ambient Operating Environment 32 to 104°F / 0 to 40°C
    Power Requirements Ground-Referenced 24 VDC @ 200 mA for Rated Output (220 mA @ 2 W RMS)
    Dimensions Not Specified by Manufacturer
    Weight Not Specified by Manufacturer
    Packaging Info
    Package Weight 0.23 lb

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