Overview
The Zdirect is a high quality totally passive interface that lets
you connect instrument, line, or speaker level signals to a mixer or
other balanced input thru a high performance audio isolation
transformer. The high impedance single-ended 1/4″ input is converted by
the transformer into an isolated balanced low impedance signal source.
The Zdirects audio transformer has an extremely flat and wide frequency
response and can handle high signal levels while still maintaining an
isolated balanced low impedance output. This gives the Zdirect 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 jack allows for tapping off of your signal chain.
The Ground Lift switch lets 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 Zdirect apart from other “DI” boxes are its
extended features and versatility. We have added a switchable low pass
Filter that cuts out all very high frequency interference. This Bessel
filter on the output is placed out of the audio range and is primarily
intended to reduce radio frequency interference before it gets into the
main system. The filter is also very effective in reducing any digital
computer noise artifacts when using the Zdirect as an interface between a
computer based audio workstation and your monitors. The Phase Invert
switch, while not normally included with your run of the mill D.I. box,
has 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 Zdirect 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 Zdirect the obvious choice.
Key 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
- Switchable phase invert
- Switchable ground lift (fully isolates inputs from chassis and outputs)
- XLR connectors for balanced outputs
- Rugged extruded aluminum case
Specifications
Frequency Response
10Hz -50kHz, +/-.5dB @ +4dBu
Total Harmonic Distortion
.01% Typical @ 1kHz, +18dBu, <.05% @ 100Hz, +18dBu
Input Connections
¼ – inch TRS unbalanced, 50k Ω
Output Connections
XLR male balanced, 600 Ω
Output Phase
Switchable, Normal/Invert
Ground Lift
Switchable, fully isolates inputs from chassis and output
Input Attenuation
Switchable, (0dB, -20dB, -40dB)
Filter Type / Response
Switchable, Low Pass, -3dB @30kHz
Dimensions
1.75″H x 4.2″D x 3.5″W (44.5mm x 107mm x 89mm)
Weight
0.75 lbs (0.35 kg)