Unika Box Series, Box ISO2X4 User Manual

Box Series

Made in Taiwan

USER GUIDE

ISO2X4

Index

01 Overview

01 Features

03 Audio Connection

05 Various System Connection

05 Eliminating Hum and Buzz and

the Ground Lift

06 Specications

Unika Electronic Co., Ltd.

www.unika.com.tw

6F, No.168, Xin-Hu 2nd Rd.
Nei-Hu District, Taipei City. 11494.
Taiwan, Republic of China.

[phone]

[phone]

　　[e-mail]

UNiKA ISO-2X4 User Guide

OVERVIEW

The ISO2X4 is a passive audio isolator/splitter designed to be inserted into the

signal chain to block hum and buzz caused by ground loops. The ISO2X4 accepts

unbalanced or balanced signals and is equally suitable for consumer electronics and

professional line-level devices.

The ISO2X4 can be operated as a dual 2 outputs splitter or the 2 inputs are summed

to form a mono 4 outputs splitter, and since the circuit is passive, no power is

required. Whether an unbalanced or balanced signal is connected, the ISO2X4

will automatically convert the signal depending on the type of cable and connector

plugged in.

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If you still need further clarification, please send email to us and we will

do our very best to reply you in short order.

FEATURES

The ISO2X4 is a simple passive device, designed to take a line-level audio signal

and split it to separate destinations without introducing noise or degrading the audio

quality.

On the ISO2X4 there are 2 inputs and 4 outputs, it is designed to be operated as a

dual 2 outputs splitter, or mono 4 outputs splitter; in dual 2 outputs splitter mode, the

input-1 audio will be split into 2 separate outputs which are the output-1&2, while the

channel-2 audio input will split into separate outputs 3&4; in mono 4 outputs splitter

mode, the 2 audio inputs are summed and then split into 4 separate outputs 1, 2, 3 &

4. Each isolated output pass through a premium transformer, which blocks DC voltage

and prevents buzz and hum from ground loops. All of the outputs feature individual

ground lift switches, which help further reduce ground loop noise.

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UNiKA ISO-2X4 User Guide

① ② ③ ④ ⑤

⑥ ⑦ ⑧ ⑨

①

Ch-1 input, transformer balanced XLR-¼" TRS.

②

Ground lift switch, the pin-1 on input-1 XLR connector will be disconnected from

the pin-1 of output-1 & output-2 XLR connectors.

③

2-Split / 4-Split mode selector:

2-split mode: Each input channel split into 2 separate outputs.

The input-1 audio will be split into 2 separate outputs which are the

output-1&2.

The input-2 audio will be split into 2 separate outputs which are the

output-3&4.

4-split mode: In mono 4 outputs splitter mode, the 2 audio inputs are summed and

then split into 4 separate mono outputs 1, 2, 3 & 4

④

Ground lift switch, the pin-1 on input-2 XLR connector will be disconnected from

the pin-1 of output-3 & output-4 XLR connectors.

⑤

Ch-2 input, transformer balanced XLR-¼" TRS.

⑥

Output-4, transformer balanced XLR output.

⑦

Output-3, transformer balanced XLR output.

⑧

Output-2, transformer balanced XLR output.

⑨

Output-1, transformer balanced XLR output.

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UNiKA ISO-2X4 User Guide

AUDIO CONNECTION

Notes for direct input and parallel connection of instruments:

Before making connections, ensure that your sound system is turned off and all volume

controls are turned down, this prevents the appearance of the transients voltage signal

could damage to system sensitive components such as high frequency speakers,

when any music instruments is plugged in or power turning on.

About the power supply:

The ISO2X4 is completely passive, so it doesn't require any power to operate.

About input / output:

The ISO2X4 has a combination XLR/TRS input connector, which is wired with the AES

standard pin-1 ground, pin-2 hot (+), pin-3 cold (-).

Balanced or unbalanced output signal can be connected to the input of ISO2X4; the

isolated outputs will always be balanced signals, this can be used in various PA system

of applications, from splitting the output of a mic preamp to different compressors or

effects units, to splitting the output of a console to multiple recording devices etc.

The balanced output of the ISO2X4 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’).

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UNiKA ISO-2X4 User Guide

Female Male

2 1

1

2

XLR-TRS Combo input

3 3

3-Signal Cold -

Fig-1: XLR Plugs Balanced connection:

1-Ground
2-Signal Hot (+)
3-Signal Cold (-)

For Unbalanced connection, pin-3 should be connected to Ground with pin-1.

Tip-Signal (+)

Sleeve-Ground

Fig-2: XLR-¼"TRS Combo

socket for direct input

Tip-Signal Hot (+)

Ring-Signal Cold(-)

Sleeve-Ground

1-Ground2-Signal Hot +

Fig-3: ¼"TS Unbalanced connection Fig-4: ¼"TRS Balanced connection

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UNiKA ISO-2X4 User Guide

VARIOUS SYSTEM CONNECTION

DJ Mixer

Stereo Balanced outputs

Stereo PA system

Stereo unbalanced inputs

-5:

Fig

Stereo Unbalanced Input to 2x Stereo

FOH System Mixer

-6:

Fig

Stereo Balanced Isolated to Distant Multi Destinations

Stage Monitor system

Balanced Isolated outputs

Outside Broadcast Truck

AW Digital Audio Work Station

ELIMINATING HUM AND BUZZ AND THE GROUND LOOP

The ISO2X4 is equipped with isolation transformers to eliminate hum and buzz caused

by stray DC voltage and ground loops.

Computers, optical projectors and other consumer equipment can be particularly noisy,

anyone that has incorporated audio with a projector knows that noise can be a serious

problem, so transformers can be incredibly useful when combating system noise.

A ground lift switch 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.

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UNiKA ISO-2X4 User Guide

SPECIFICATIONS

Audio Circuit Design Passive, Transformer Isolated.

Frequency Response 20Hz to 20KHz, +0.5 / -0.5dB

Input level Mic level to +28dBm max.

Input Impedance 600Ω impedance matching

Output impedance 600Ω impedance matching

Output Balanced transformer isolated

Dynamic range >130dB

Noise floor <-100dBu, unweighted 20Hz to 20KHz.

Total harmonic distortion Less than 0.008% at 1KHz, 0dBu output

(Specications are subject to change without notice.)

(XLR-M, Pin-1 Ground, Pin-2 Hot, Pin-3 Cold)

Ground lift Lifts pin-1 on XLR outputs

Finish Durable powder coat

Size 158mm (W) x 112mm (D) x 46mm (H)

Weight 1.2Kg, 2.6lbs.

Construction 14 gauge steel cabinet & chassis

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