ISO-2

OVERVIEWS

The ISO-2 is a passive audio isolator designed to be inserted into the signal chain to block hum and buzz caused by ground loops. The ISO-2 accepts unbalanced or balanced signals and is equally suitable for consumer electronics and professional line-level devices.

The ISO-2 can be operated as a dual input and outputs, and since the circuit is passive, no power is required. Whether an unbalanced or balanced signal is connected, the ISO-2 will automatically convert the signal depending on the type of cable and connector plugged in.

DESCRIPTION

AUDIO CONNECTION

Before connection:
As with all audio gear, always ensure audio system levels are turned down or equipment turned off before making connections. This will avoid plug-in or turn-on transients from damaging more sensitive components such as tweeters.

Connect ISO-2 to system: 
The ISO-2 has two combination XLR/TRS input connectors, wired to the AES standard pin-1 ground, pin-2 hot (+), pin-3 cold (-).

Balanced or unbalanced output signal can be connected to the input of ISO- 2; the isolated outputs will always be balanced signals.

The balanced output of the ISO-2 is line level, meaning that it should be connected to the line input of a mixing console.

Suggestions about distance cable running:
Unbalanced cables are much more susceptible to noise than their balanced counterparts, keeping unbalanced cables under 8 meters (25’) in length is good practice while balanced cables can easily extend to 100 meters (300’).

ELIMINATING HUM AND BUZZ AND THE GROUND LOOP

The ISO-2 is equipped with output isolation transformers to eliminate hum and buzz caused by stray DC voltage and ground loops.

Computers, CD players and other consumer equipment can be noisy – this is particularly true when incorporating audio with a projector – so isolation transformers can be very useful when combating system noise.

The independent Ground Lift switches on the outputs takes this one step further by lifting pin-1 on the XLRs. Computers are often the source for noise problems in audio systems, so greater care is certainly needed to keep things quiet.

FEATURES

The ISO-2 is a simple passive device, designed to electronically-isolate connected line-level audio equipment without degrading the audio quality.

On the ISO-2 there are 2 inputs and 2 outputs which block DC voltage and prevent buzz and hum from ground loops. Both outputs feature individual ground lift switches to help further reduce ground loop noise.

SPECIFICATIONS
ISO-2
Circuit design
Input connectors 2 Balance combo jack
( Pin-2 hot, Pin-3 cold, Pin-1 ground )
Input DC impedance 0.82KΩ
Max. input level before clipping +26dBv
Output device 2 XLR w/balance transformer isolated
Output DC impedance 1.08KΩ nominal, Transformer balance
Output level +26dBv
Frequency Response 20Hz to 20KHz +0.2 / 0 dB
Dynamic range >130dB
S/N ratio~ un-weight 20Hz to 20KHz -136dB
T.H.D~ 1KHz, 0dBv output < 0.001%
Ground/Lift switch Lift pin-1 on XLR outputs, separate
Reverse switch Channel 2 input
Construction 1.6/1.2mm steel cabinet & chassis
Surface finished Durable powder coating
Dimension(WxDxH) 124 x 78 x 46mm
Weight 0.5Kg
Shipping weight 0.6kg
Packing per carton 20pcs/13Kgs
Shipping dimension per carton 350 x 310 x 207mm
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