ART Pro Audio DUALZDirect User Manual

Dual Channel Passive Direct Box

Artcessories

User's Manual

IMPORTANT SAFETY INSTRUCTION – READ FIRST

This symbol, whenever it appears,
alerts you to the presence of
uninsulated dangerous voltage
inside enclosure-voltage that may be
sufficient to constitute risk of shock.

Read Instructions: Retain safety and operating instructions for
future reference. Heed all warnings printed here and on the
equipment. Follow the operating instructions printed in this us er
guide.

Do not open: There are no user serviceable parts inside. Refer
any service work to qualified technical personnel only.

Grounding: Only connect the unit to equipment with properly
grounded mains power. Do not defeat the grounding and
polarization means of the power cord plug of the connected
equipment. Do not remove or tamper with the ground
connection on the power cord of the connected equipment.

Environment: Protect from excessive dirt, dust, heat, and
vibration when operating and stori ng. Avoid tobacco as h, drink
spillage and smoke, especially that associated with smoke
machines.

Handling: Protect the controls from damage during t rans i t. Use
adequate padding if you need to ship the unit. To avoid injury to
yourself or damage to the equipment, take care when lifting,
moving or carrying the unit.

Servicing: Refer servicing to qualified technical personnel.

This symbol, whenever it appears,
alerts you to important operating
and maintenance instructions in
the accompanying literature.
Please read the manual.

Installation: Install the unit in accordance with the instructions
printed in the user guide.

INTRODUCTION:

Thanks for purchasing Applied Research and
Technology’s DUALZDirect. The DUALZDirect provides
two independent high quality totally passive interfaces
that let you connect instrument, line, or speaker level
signals to a mixer or other balanced inputs through high
performance audio isolation transformers. Each of the
high impedance single-ended 1/4” inputs is converted by
a transformer into an isolated, balanced, low impedance
signal output. The DUALZDirect's audio transformers
have an extremely flat and wide frequency response
and can handle high signal levels. This gives the
DUALZDirect a very clean and neutral sound with a
wide variety of signal sources and over long signal runs
in high noise environments.

The input ATTENUATOR switches allow for a wide
range of signal levels and the input THRU jacks allows
for tapping off of your signal chain. The GROUND LIFT
switches let you totally separate the input and output
signal grounds, when appropriate, to isolate two
systems, thereby reducing hum and ground-loop noise.

What further sets the DUALZDirect apart from other “DI”
boxes are its extended features and versatility. We have
added switchable low pass FILTERs that cut out all very
high frequency interference. These Bessel filters on the
outputs are placed out of the audio range and are

primarily intended to reduce radio frequency
interference before it gets into the main system. The
filters are also very effective in reducing any digital
computer noise artifacts when using the DUALZDirect
as an interface between a computer-based audio
workstation and your monitors. The PHASE INVERT
switches, while not normally included with your "run of
the mill" DI box, have been added to allow you to switch
signal polarity right at the source. This feature is
especially handy when you are combining a direct tap
with a microphone feed in the mix.

The compact black-anodized all aluminum case and it’s
passive design allow the DUALZDirect to provide years
of trouble free service in Live Sound, Permanent/Fixed
Install, D.J., and virtually any PA application. It’s full
feature set, rugged construction, and high-end
specifications make the DUALZDirect the obvious
choice.

FEATURES:

• Fully passive, high performance transformer design.
No battery required.

• Converts 50k Ohm inputs into 600 Ohm balanced
outputs

• Switchable input attenuation (0, -20, -40 dB)
Switchable low pass filter