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Radio Design Labs STSX4
4-Channel Audio Switcher

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STSX4

The ST-SX4 is a remote-controllable unbalanced audio source selector in the group of STICK-ON series products by Radio Design Labs. These products are designed for quick, convenient installation, and reliable operation in a variety of audio applications.

The ST-SX4 accepts up to 4 unbalanced audio sources. Any of these sources may be selected to feed the output, or all sources may be switched OFF. The output from the ST-SX4 is unbalanced. Control of the module is accomplished through a single input terminal. Connection of a specified resistance between the control input and ground causes the desired input to be switched ON. If no control input is connected, the ST-SX4 defaults to input 4. If the control input is shorted to ground, all inputs are switched OFF.

Use of a single-pair cable for control allows a minimum of wire to be installed. Installers may use a variety of remote switches; rotary, push button, toggle, etc. The three resistors are provided with the module. The ST-SX4 may conveniently be used with the ST-VCA2 to provide both remote switching and remote volume control. In this case, it is necessary to provide only a single-pair-shielded to control both modules (1 conductor to control the ST-SX4, 1 conductor to control the ST-VCA2, shield to provide control ground path). Two ST-SX4 modules may be used together for stereo switching.

Audio Specifications:

  • In/Out Level: -10 dBV
  • Gain: Unity
  • Headroom: 23 dB
  • THD: less than 0.100%, Typ. 0.050%
  • Frequency Response: 15 Hz - 40 kHz (+/- 0.5 dB)
  • Input Impedance: 100 kohm, Unbalanced
  • Output Impedance: less than 50 ohm, Unbalanced
  • Crosstalk: Below Noise Floor
  • Off-Channel Attn:
        * greater than 85 dB @ 1 kHz
        * greater than 80 dB @ 10 kHz
        * greater than 75 dB @ 20 kHz
  • Residual Noise: less than 70 dB below -10 dBV

Our Part #  STSX4

Mounting Kit for STICK-ON, TX, or Rack-Up moduleRadio 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 PanelRadio 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 UnitsRadio 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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Our Price:$130.83
List Price: $175.00
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19" Rack Adapter, multiRadio 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 UnitsRadio 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 UnitsRadio 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 ...

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Rackmount System for 12 Stick-On UnitsRadio 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 UnitsRadio 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, SingleRadio 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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Our Price:$79.77
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Table-Top Wedge-Mount EnclosureRadio 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 ...

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Detachable Terminal BlockRadio 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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