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Radial JS3
Radial JS3 Radial JS3 Radial JS3

Radial JS3

Dual Isolated Passive Microphone Splitter Direct Box

Brand New

Out of stock

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Product Description for the Radial JS3

The Radial JS2 and JS3 are high performance balanced mic level splitters that let you to split a signal and feed multiple destinations at the same time. Typical applications include splitting a signal in the studio to feed more than one preamp, feeding a stage mic to more than one mixing console, or even splitting the signal to a live PA during a broadcast event.

Two units are offered: The JS2 is equipped with one isolated output while the JS3 has two. The engine inside both units is a premium Jensen transformer. It features a nickel laminated core for exceptionally low harmonic distortion without the usual phase shift and limited bandwidth typically introduced by lesser designs. The JS2 and JS3 deliver better than 90dB of noise rejection, eliminating troublesome noise caused by stray DC voltage and hum & buzz caused by ground loops. The signal path is 100% discrete and incorporates RF filtering for even greater noise suppression. These 'problem-solvers' offer a simple yet highly effective interface for microphones or direct boxes, and by engaging the built-in -30dB pad, consumer and line level devices may also be connected without distortion or fear of overload due to saturation.

As with all Radial products, both mic splitters feature rugged 14-gauge steel construction for maximum durability. A unique book-end design creates a protective zone for switches and connectors against the harsh environment of concert touring while the internal I-beam frame makes it virtually impossible to torque the PC board which could otherwise compromise the sensitive solder joints. The innovative design also has the unique advantage of allowing up to 8 units to be rack-mounted using the Radial J-Rak.

The Radial JS2 and JS3... split the mic signal without compromising your sound.


  • Jensen transformer-equipped for optimal signal transfer
  • 3-way microphone splitter
  • Compact design , up to 8 may be rack mounted in J-Rak
  • Ultra rugged 14-gauge steel construction for added durability
  • Audio circuit type  : Passive mic/line splitter, transformer based
  • Number of channels  : Three-way splitter (one in/three out)
  • Frequency response  : 20Hz ~ 20KHz (+0dB/ -2dB) 
  • Dynamic range  : 140dB
  • Maximum input  : +25dBu @ 1kHz
  • Total harmonic distortion  : 0.0005% @ 1kHz
  • Phase deviation  : 0.7° @ 100Hz; 2.8° @ 20Hz
  • Common mode rejection ratio  : 
  • Input impedance  : 2.4k Ohms, unbalanced
  • Output impedance  : 150 Ohms, balanced     
  • JS2 transformer  : JT-MB-CPC, 1:1 ratio
  • JS3 transformer  : JT-MB-DPC, 1:1:1 ratio
  • Shield  : Dual Faraday, MuMETAL® can
  • Input pad  : -30dB (allows line-level sources) 
  • Ground lift  : Disconnects XLR pin-1 at direct-2 and isolated output
  • XLR configuration  : AES standard (pin-2 hot)
  • Connectors  : XLR-F in, XLR-M direct; direct-2; isolated outputs


  • Construction  : 14 gauge steel chassis & outer shell
  • Finish  : Durable powder coat
  • Size : (W x H x D) 84 x 127 x 48mm (3.3" x 5.0" x 2")
Brand Radial
Weight 1.9500
Dimensions (WxHxD) 4.25" x 3" x 6.5"


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Radial JS3


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