RDL STDA3
ST-DA3

OUR PART #  STDA3


The RDL ST-DA3 gives you the advantages of an audio distribution amplifier PLUS you can put it where you need it. The ST-DA3 allows bridging of any audio line, adjusting the gain, and driving either high or low impedance, balanced or unbalanced loads. The ST-DA3's wideband circuitry produces the unsurpassed pure clarity, ultra-low distortion and low noise for which RDL products are known.

NOTE: Radio Design Labs' PS-24AS power supply is NOT included but is required in order to power this product.  Please see the "Accessories" tab or click here for more information on the PS-24AS power supply.

Radio Design Labs ST-DA3 Features:

  • Functions as an electronic transformer
  • Provides isolation, gain, and three outputs
  • Wideband amplifiers produce impeccable audio
  • Operates from ground-referenced, floating or bipolar power supply
  • Ultra-low distortion
  • Ultra-low noise
  • Excellent phase response
  • Gain adjustment 17 dB above or below unity
  • Ample headroom at operating level
  • Recessed multi-turn audio taper gain trimmer for precise control
  • Input and outputs are RF protected
  • Full operation in either high or low impedance circuits
  • Outputs are short circuit protected
  • Positive connections via barrier block

Radio Design Labs ST-DA3 Specifications:

  • Input: 20 kohm balanced or unbalanced
  • Input Signal: -15 dBV to +21 dBu (for +4 dBu output)
  • Maximum Input Level: +24 dBu
  • Outputs (3): 150 ohm balanced or 75 ohm unbalanced
  • Output Signal:
        * Balanced: +4 dBu nominalbalanced
        * Unbalanced: 6 dB below balanced line level
  • Maximum Output Level: +25 dBu
  • Frequency Response: 10 Hz to 100 kHz (+/- 0.05 dB)
  • THD+N:< 0.002% (unity gain)
  • IMD:< 0.003% (unity gain)
  • Noise below +4 dBu:< -98 dB (unity gain)
  • Headroom:> 20 dB (above +4 dBu)
  • Gain: Unity +/- 17 dB (adjustable)
  • CMRR:> 60 dB (50 Hz to 120 Hz)
  • Power Requirement: Ground-Referenced or Floating 24 to 33 Vdc @ 70 mA
RDL STR19A STR-19A

RDL STR19A STR-19A

Radio Design Labs' STR-19A Racking System holds up to 12 STICK-ONs in a 19" rack and only occupies two rack spaces.
Log In For Price
In Stock
RDL DRA-35S  Din Rail Adaptor for STICK-ON

RDL 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 ...
Log In For Price
In Stock
RDL PS24AS PS-24AS

RDL PS24AS PS-24AS

Radio Design Labs' PS-24AS is a 24 VDC/500 mA switching power supply with a North American AC plug. Compatible with various RDL products.Radio Design Labs PS-24AS Specifications: Input: 100 to 240 VAC Output: 24 Vdc, 500 mA (UL, ...
Log In For Price
In Stock
RDL MB1-RDL Mounting Kit for STICK-ON, TX, or Rack-Up module

RDL 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.
Log In For Price
In Stock
RDL STRRB1 ST-RRB1

RDL STRRB1 ST-RRB1

Radio Design Labs' ST-RRB1 mounting kit contains a bracket to attach a STICK-ON module to a rear rack rail or to any flat surface. The module slides into the holder and snaps into position. The module may easily be removed.
Log In For Price
In Stock
RDL STR19B STR-19B

RDL STR19B STR-19B

Radio Design Labs' 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 ...
Log In For Price
Please call for availability.
RDL SR4 SR-4

RDL SR4 SR-4

Radio Design Labs' 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. ...
Log In For Price
Usually ships in 6-10 business days.
RDL SR10 SR-10

RDL SR10 SR-10

Radio Design Labs' 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 ...
Log In For Price
Usually ships in 4 business days.
RDL SR12A SR-12A

RDL SR12A SR-12A

Radio Design Labs' SR-12A chassis can be mounted in a rack or on a backboard to provide mounting of 12 STICK-ONs.
Log In For Price
Usually ships in 6-10 business days.
RDL SMK12 Smk 12 Mounting Strip for STICK-ON Units

RDL SMK12 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.
Log In For Price
Usually ships in 6-10 business days.
RDL DTB-RDL Dtb Rdl Detachable Terminal Block

RDL DTB-RDL Dtb Rdl Detachable Terminal Block

Use DTB's to quickly detach and reattach wiring harness to STICK-ON units.
Log In For Price
Usually ships in 4 business days.

Click to download

Add to Cart

We're sorry, only of this item available



Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM