JS2 User Guide. Click to view PDF.


JS3 User Guide. Click to view PDF.
JS2 Block Diagram. Click to view larger.
JS3 Block Diagram. Click to view larger.

Using the JS2™ and JS3™

The following is a brief page that outlines on how to use the JS2 and JS3. Both units are designed to be plug and play simple. For more details, we invite you to download the user guide by clicking here or on the icon at left.

Quick Start

As with all electronic equipment, make sure you turn levels down or turn components off before making connections. This will help avoid damage from turn-on transients that could otherwise harm more sensitive devices such as loudspeakers.

The basic opperation of the JS2 and JS3 is to split the signal from a microphone. One output is the direct or a parallel of the input. The other output uses a transformer to de-couple signal ground and isolate any device connected to it.

Basic Connections

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  1. Connect the mic to the XLR-female MICROPHONE INPUT.
  2. Connect the XLR-male DIRECT-1 THRU to your main console. The DIRECT-1 output allows 48V phantom power from your main console to flow back to the microphone should it be required for condenser mics.
  3. Connect the ISOLATED-1 output to your second mixer. This could be a stage monitor, recording or broadcast console.
  4. Slowly turn the system level up and listen for noise from the ISOLATED-1 output. If you here noise depress the ground lift switch.

Mic and line input

The input panels for both the JS2 and JS3 are identical. Typicaly,a microphone connects to the INPUT as outlined in the quick start section above. But The JS2 and JS3 can be used with line-level devices like keyboard mixers and audio players too.

A -30dB PAD switch on the input turns this mic-splitter into a line-splitter. Just engage the -30dB PAD and connect your line devices to the mic input. The application below is one example where the JS2 or JS3 could be used for a line-level split. The line output from keyboard mixer is routed through the JS2 to main and monitor consoles.

Line-level splitter application for a keyboard mixer.


The "third" output

Both units are equipped with a "third" output. On the JS2 this third output is another parallel thru feed with a ground lift switch labled DIRECT-2. On the JS3 the third output is another transformer isolated output labled ISOLATED-2.

The advantage with an isolated out is greater immunity to noise when connecting more than two consoles together. The downside of course is the cost of the transformer. This is why we offer the choice between the 2-way JS2 and the 3-way JS3.

The third output on the JS2 is labled THRU DIRECT-2 indicating a second parallel output.
The third output on the JS3 is labled THRU ISOLATED-2 indicating a second transformer output.



Direct-2 output (JS2)

The DIRECT-2 output on the JS2 is another parallel output like DIRECT-1. This second direct output is equipped with a ground lift switch. Depressing this switch disconnects the signal ground at the XLR pin-3. Although not as effective as trasformer isolation the ground lift feature can often help eliminate hum and buzz caused by ground loops some situations.

With the JS2 you can use the second direct output in many ways. For instance you could connect it to a second mixer channel. This would allow an engineer to process the same mic feed on two difference channels with different signal processing on each. You could use it to drive a headphone amplifier, cue monitor or portable recorder.

The DIRECT-2 output can be used to feed signal to a viriety of devices.
Here a battery powered portable recorder connects to the second direct output.

Isolated-2 output (JS3)

The ISOLATED-2 output (JS3) connects to an addition recording or broadcast console or any device you want isolated from noise caused by ground loops. If you hear hum or buzz from the isolated outputs depress the ground lift switch(s) to engage the transformer isolation.

A live performance where the show is being recorded or broadcast is a situation where a second isolated output would be usefull. In the application below the mic signal is split 3-ways. The DIRECT-1 out feeds a PA system, ISO-1 drives the monitor console and recorder and press-box. The direct output feeds a small PA mixer/amp. The isolated outputs drive the recorder and press-box.

Example of a 3-way split using the JS3. The monitor console and recorder are
isolated from the each other and the main console by the JS3's two transformer outputs.