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Radio Design Labs ST-MA2
Muting Monitor Amplifier

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Radio Design Labs ST-MA2

The ST-MA2 is part of a group of products in the STICK-ON series from Radio Design Labs. The durable bottom adhesive permits quick, permanent mounting nearly anywhere or it may be used with RDL's racking accessories. The ST-MA2 offers the ultimate in totally solid-state muting and attenuation switching, with the big plus, you can put it right where you need it!

The ST-MA2 is a compact audio monitor amplifier with control inputs to mute or reduce the gain of its output. This module may be used in conjunction with other RDL modules to configure automatic mixing systems or may be used alone as a single speaker monitor amplifier. The ST-MA2 is typically used to drive a small tabletop or overhead monitor speaker in a conference room, boardroom, courtroom, public forum panel or similar installation. The ST-MA2 is ideally suited for use in automatic mixing systems due to its control inputs.

The line-level input may be wired balanced or unbalanced. The audio output will drive standard speakers from 4 to 45 ohm. Normal gain is preset by means of a trimmer on the module.

Five control inputs are provided. An open-collector, a switch closure, or compatible logic signals may activate each. Typically, an RDL ST-GSP1 Gated Speech Preamplifier controls these inputs. There is a control input which mutes the ST-MA2 output completely. This may be used to prevent feedback if there is a pickup mic associated with the speaker driven by the ST-MA2. Two control terminals are provided to attenuate the ST-MA2 output by 3 dB, and two additional terminals are provided to attenuate the output by 6 dB. These connect from the mic logic (or open-collector) control signals from gated mic preamps for adjacent and second adjacent locations.

TMGR# STMA2

Mounting Kit for STICK-ON, TX, or Rack-Up module
Radio Design Labs MB1-RDL
Mounting Kit for STICK-ON, TX, or Rack-Up module

Two mounting brackets mounts a STICK-ON, TX, or Rack-Up module to a flat surface.

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Kit to Mount ST, TX Series Modules on FP Panel
Radio Design Labs MB3-RDL
Kit to Mount ST, TX Series Modules on FP Panel

TX or STICK-ON Module fastens to MB-3 which slides into FP-RRA/H track.

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Universal Rack Chassis, 3 Units
Radio Design Labs RC1U
Universal Rack Chassis, 3 Units

RC-1U Holds Up To 6 RACK-UP Products or 12 STICK-ON Modules. RACK-UPs, STICK-ONs and Accessory Panels May Be Installed in Unlimited Combinations.

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19" Rack Adapter, multi
Radio Design Labs RURA3A
19" Rack Adapter, multi

The RU-RA3A permits the mounting of five STICK-ON modules together with three RACK-UP modules. If AMS accessories are mounted in the RACK-UP mounting spaces, then up to 10 STICK-ON modules may be secured to the RU-RA3A shelf.

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Mounting Strip for STICK-ON Units
Radio Design Labs SMK-12
Mounting Strip for STICK-ON Units

The SMK-12 allows removable surface (up to 6 units) or edge (typically 12, max. 16) mounting of STICK-ON units. They can be fastened to its surface using screws or adhesive foam pads.

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Stick-On Mounting Rack for 10 Units
Radio Design Labs SR-10
Stick-On Mounting Rack for 10 Units

The STR-10 Racking System holds up to 10 STICK-ON units.  It holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or the top (depending on where the adjustment is located on the STICK-ON ...

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Stick-On Mounting Rack/Up to12
Radio Design Labs SR12A
Stick-On Mounting Rack/Up to12

SR-12A chassis can be mounted in a rack or on a backboard to provide mounting of 12 STICK-ONs.

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Mounting Frame for Stick/TX
Radio Design Labs SR4
Mounting Frame for Stick/TX

The SR-4 is a universal module chassis that can mount to a backboard, wall or nearly any other support. It provides mounting for 4 STICK-ON power amplifiers or 7 standard STICK-ON modules. TX ™ modules may also be mounted. There is ample ...

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Rackmount System for 12 Stick-On Units
Radio Design Labs STR19A
Rackmount System for 12 Stick-On Units

The STR-19A Racking System holds up to 12 STICK-ONs in a 19 inch rack and only occupies two rack spaces.

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Rackmount Kit for 10 Stick-On Units
Radio Design Labs STR-19B
Rackmount Kit for 10 Stick-On Units

The STR-19B Racking System holds up to 10 STICK-ON unitss in a 19 inch rack and only occupies two rack spaces. The STR-19B holds STICK-ONs at an angle allowing for control adjustment from either the edge of a STICK-ON, or the top ...

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Utility Chassis, Single
Radio Design Labs UC1
Utility Chassis, Single

The UC-1 is an ULTRASTYLE design tabletop chassis for mounting RDL modules and accessories. The front panel features a single RACK-UP mounting bay. The rear panel has an identical mounting bay and is supplied with matching filler panels. ...

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Table-Top Wedge-Mount Enclosure
Radio Design Labs WDG1
Table-Top Wedge-Mount Enclosure

WDG1 Holds 1 RACK-UP and 2 STICK-ON Modules. Front-panel LED Can Be Used To Indicate Power or Anything Desired!

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Din Rail Adaptor for STICK-ON
Radio Design Labs DRA-35S
Din Rail Adaptor for STICK-ON

The DRA-35S is a 35 mm DIN rail mounting bracket that provides positive mounting for any RDL STICK-ON® module. The oblique mounting angle of the DRA-35S allows an installer to mount several STICK-ON modules to a single DIN rail. Access to ...

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Detachable Terminal Block
Radio Design Labs DTB-RDL
Detachable Terminal Block

Use DTB's to quickly detach and reattach wiring harness to STICK-ON units.

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