Avsl 173.294 Filter Direct box User Manual download pdf

Filter Direct box

User Manual

173.294

Thank you for buying the QTX Sound Filter Direct Box.

Please read and follow these instructions in order to get

the most from your product.

A Direct Box or D.I. box (Direct Inject) is used to convert

high impedance line level signals (like guitar, keyboards,

playback devices etc.) into low impedance, enabling the

signal to travel long distances along balanced cables and

connect directly with a mixing console via the XLR

connector.

This passive Filter Direct Box utilises a high grade audio

transformer to convert the signal and requires no external

power source.

The low impedance and balanced wiring help to reduce

noise and interference in long cable runs.

The QTX Sound Filter Direct Box has the added feature

of an RF filter, to further help remove unwanted radio

frequency interference.

Connection

Operation

Connect signal source (guitar, keyboard etc.) to the

6.3mm jack socket INPUT and if an on-stage

amplifier is to be used, connect to this via the

PARALLEL OUTPUT jack socket.

Depending upon the input type, one of 3 selectable

levels of attenuation will help to match the signal

level so that it doesn’t over-drive the mixer input.

Connect the Filter Direct Box to the mixing console

via balanced XLR cable, ensuring that the channel

is turned down to avoid loud clicks through the

channel. If there is hum present, switching the GND

LIFT to “ON” might help, otherwise this can remain

“OFF”

Circuit Layout

SPECIFICATIONS

Frequency Range High - Low impedance 15Hz - 30kHz

Low - High impedance 30Hz - 20kHz

Attenuation 0dB, -20dB, -40dB

Input 6.3mm jack unbalance 50kΩ

Max. input voltage 32V

Outputs XLR 500Ω balanced

6.3mm jack parallel out

Transformer Ratio 10:1

Operating Temp. 0 - 40°C

Dimensions 100 x 45 x 100mm

Weight 300g

Filter Direct box

User Manual

173.294

Thank you for buying the QTX Sound Filter Direct

Box. Please read and follow these instructions in

order to get the most from your product.

A Direct Box or D.I. box (Direct Inject) is used to

convert high impedance line level signals (like

guitar, keyboards, playback devices etc.) into low

impedance, enabling the signal to travel long

distances along balanced cables and connect

directly with a mixing console via the XLR

connector.

This passive Filter Direct Box utilises a high grade

audio transformer to convert the signal and requires

no external power source.

The low impedance and balanced wiring help to

reduce noise and interference in long cable runs.

The QTX Sound Filter Direct Box has the added

feature of an RF filter, to further help remove

unwanted radio frequency interference.