Stage Series
ISO-2
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.
OVERVIEW
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.
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 | ||