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DX8 – 3
2. INTRODUCTION
The DX8 is a DSP-based digital audio mixer and
signal processor designed for use in a variety of
installations such as churches, courtrooms,
convention centers, and hotels. It provides eight
universal inputs and two balanced outputs allowing
true 8x2 mixing for stereo or dual-zone applications.
The DX8 includes powerful signal processing
software to complement the 8x2 mixing structure.
Automixing capability allows the DX8 to be setup for
applications where a human operator is not available.
Each of the eight input channels is terminated to
two Phoenix-type detachable connectors. Each
connector is optimized to accept either microphone
or line-level signals. Microphone preamplifiers
employ Mackie’s proprietary XDR™ technology to
offer studio-class audio performance. Phantom
power of 48 VDC is switchable individually on each
input. Two auxiliary line-level inputs with trim are
provided, allowing analog signals to be mixed with
the A and B master mixes. Master outputs deliver
balanced line-level signals to detachable Phoenix-
type connectors as well as buffered unbalanced
signals to RCA connectors intended for recording.
The DX8 offers an intuitive front panel user
interface, consisting of dual-function LED bar graph
meters for each input and output. Input meters
indicate the presence of signal before signal pro-
cessing (pre-fader), while output meters indicate
actual level at the output (post-fader). Levels are set
by means of UP/DOWN pushbuttons dedicated to
each input and output. A MODE button is used to
select between Mix A and B, allowing adjustment
of levels to both mix outputs from the same set of
input controls. A third function of the MODE button
allows the user to LOCK the front panel controls
until a security unlock code is entered.
The DX8 offers flexible interface options through
dedicated inputs and outputs for control and
programming purposes. Two independent RS232
connectors are provided, one on the front panel and
one on the rear, for connection to a computer or
control system. A multi-pin (DB25F) connector on
the rear panel allows interface among the 10 Logic
Inputs and 10 Logic Outputs. This interface
connects to switches, LEDs, and other devices,
enabling hardware control and indication from
custom control panels. All logic inputs and outputs
are fully programmable in software. A proprietary
remote control bus allows connection of the
optional wired remotes over three-conductor cable.
Remotes are available in Volume Control (DX-RVC)
and 4-Switch (DX-SW4) versions and may be
combined in any configuration.
The DX8 is supplied with PC software that
allows access to all of the system’s settings and
configurations. The software offers access to the
Automixing controls, two 1/3-octave equalizers, two
5-band parametric equalizers, and two compressors
dedicated to the two master outputs. In addition, it
allows configuration and recall of up to 16 Presets, 8
input Priority Levels, 8 Mute Groups, and 8 Control
Groups. Force ON and OFF functions are provided,
with a selection of Relative or Absolute changes,
which can be used with the Priority settings to
create sophisticated audio management systems.
All settings and text labels are retained in the DX8,
and can be saved on the computer’s local drive.
The DX8 is UL and CE approved and designed
for continuous use in professional fixed installation
systems. An internal auto-ranging power supply
allows connection to mains voltages from 90-240V AC
at 50/60 Hz without requiring jumper or switch
setting changes. A 24 VDC input is provided for
applications where backup power is required.
Switchover to backup power is automatic and silent.
KEY FEATURES
• 32-bit DSP and 24-bit Analog/Digital Conversion
• 8 balanced XDR™ Mic/Line inputs with trim
• 2 balanced Line inputs direct to mix buses A and B
• 2 Independent Mix Buses and balanced Outputs
• 2 unbalanced Record Outputs
• 8 unbalanced Direct Channel Outputs
• Individual Level/Peak (PPM) metering on each Input and Output
• 3-band sweepable Hi/Lo shelving and mid-peaking EQ
on each Input
• 2-band sweepable shelving EQ on each Output
• 31-band Graphic EQ on each Output
• 5-band Parametric EQ on each Output
• One fully variable Compressor on each Output
• Independent Automixing function for each Output to maximize
acoustic gain and prevent feedback
• 10 Programmable Logic Inputs
• 10 Programmable Logic Outputs
• 2 independent RS-232 interface ports
• 48 VDC Phantom Power switch per input
• 24 VDC Backup Power input
• Hardware Expansion Port accepts optional modules
• PC Software application included
Part No. SW0065 Rev. A 05/03
© 2001-2003 Mackie Designs Inc. All Rights Reserved.