8x2 Digital Mixer and Signal Processor
The DX8 is a Digital Signal Processing-based
digital audio mixer and 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.
In its base configuration, the DX8 includes
powerful signal processing software to complement the 8x2 mixing structure. The automixing function allows the DX8 to be used
in applications requiring little or no human
operation. Optional software and hardware
is available to further expand the DX8’s
capabilities, allowing it to meet the needs of
more sophisticated applications.
Each of the eight input channels is capable
of being terminated to one of two Phoenixtype detachable connectors, each optimized
to accept either microphone or line-level signals. Microphone preamplifiers use XDR™
technology to offer studio-quality audio
performance. Phantom power, of 48VDC, is
switchable individually on each microphone
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 processing (pre-fader), while
output meters indicate actual level at the
output (post-fader). Levels are set by means
of front panel, 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 sameset 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 (DB25) connector on
the rear panel allows interface between
the 10 Logic Inputs and 10 Logic Outputs 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 DX8 wired remotes
over a three-conductor cable. Remotes
are available in both Volume Control and
4-switch 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
Stereo and Mono mixer views, as well as
access to the 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 as well as
stored to the computer’s local drive.
The DX8 is UL and CE approved and
designed for continuous use in professional
fixed installation systems. An internal autoranging power supply allows connection to
mains voltages from 90–240VAC at 50/60Hz
without requiring jumper or switch setting
changes. A 24VDC input is provided for
applications where backup battery power
is required. Switchover to backup power is
automatic and silent.
·· 32-bit DSP and 24-bit Analog/Digital
·· 8 balanced XDR™ Mic/Line inputs with
·· 2 balanced Line inputs direct to mix bus
·· 2 Independent Mix Buses and balanced
·· 2 unbalanced Record Outputs
·· 8 unbalanced Direct Channel Outputs
·· Individual Level/Peak metering on each
Input and Output
·· 3-band sweepable Hi/Lo shelving and a
mid-peaking EQ on each Input
·· 2-band sweepable shelving EQ on each
·· 31-band Graphic EQ on each Output
·· 5-band Parametric EQ on each Output
·· One fully variable Compressor on each
·· 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
·· 48VDC Phantom Power switch per input
·· 24VDC Backup Power input
·· Hardware Expansion Port accepts
optional modules
·· PC Software application included
·· Meeting Rooms
·· Hotels
·· Houses of Worship
·· BoardRooms
·· Courtrooms
·· Multizone Paging/Music Systems
·· Multi-Purpose Facilities
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX 425.485.1152 | Page 1 of 6
8x2 Digital Mixer and Signal Processor
Inputs 1-8:
Bus A and B:
Balanced, Phoenix-type terminals
Balanced, Phoenix-type terminals,
direct to Mix Buses
Balanced, Phoenix-type terminals
Unbalanced, RCA
Unbalanced on DB15
(bottom row is return)
10 inputs on DB25
10 open-collector outputs on DB25
2 RS-232C on DB9
Master Outputs:
Record Outputs A/B:
Direct Outputs 1-8:
Logic Inputs:
Logic Outputs:
Serial Ports:
Input Trim:
Input Gain:
Master Output Gain:
Mode Select:
Phantom Power Select:
8 Rotary potentiometers
2 Pushbuttons per input
2 Pushbuttons for low, 2 for high
2 Pushbuttons per output
1 Pushbutton
Rocker switch
8 DIP switches
Input Levels:
EQ Levels:
Mode Status:
Output Levels:
Volume Setting:
12-segment LEDs per ch.
12-segment LEDs per ch.
12-segment LEDs per ch.
12-segment LED bar graph
AC Power:
DC Power:
Fuse Ratings:
90–240 VAC, 50/60 Hz, 1A
24 VDC, 3A
1.6A Slo Blo, 250V
Five, 32-bit floating point DSPs, 24-bit
512k x 16 Flash, 128k x 32 SRAM
(battery back-up)
3-band shelving/peaking EQ:
Automatic Level Control (ALC)
Automatic Level Control (ALC)
Automix MAC NOM:
Automix Last Mic On:
2-band shelving EQ:
1/3-Octave graphic EQ
5-band parametric EQ
Total Harmonic Distortion (THD+N)
(1 kHz @ +10 dBu {unity level} 20 Hz–20 kHz)
Mic in to Master Out:
Below 0.005%
1kHz relative to 0 dBu, 20 Hz–20 kHz bandwidth, Any line input to adjacent
Direct Output, Trim to unity:
Less than –90 dB
Frequency Response
Mic Input to Direct Outputs:
3 Hz–192 kHz, +/–3 dB
Mic Input to Master Outputs:
20 Hz–20 kHz, +/–0.5 dB
Equivalent Input Noise (EIN)
Mic in to Direct out, Max Gain
150 ohm Termination:
–129.5 dBm unweighted
Common Mode Rejection (CMR)
Mic in to Direct out, Max gain
1kHz signal:
Better than 80 dB
Maximum and Nominal Levels and Ranges
Mic Inputs:
+18 dBu, +4 dBu, 0 to 60 dB gain
Line Inputs:
+18 dBu, +4 dBu, –30 to +30 dB gain
Bus A/B Inputs:
+18 dBu, +4 dBu, –20 to +20 dB gain
All Outputs:
+18 dBu, +4 dBu
Mic Inputs:
1.3K ohms
Line Inputs:
40K ohms
All Other Inputs:
10K ohms or greater
All Outputs:
120 ohms
Phantom Power
+48 VDC current limited to 7 mA per
input channel
Dimensions (HxWxD):
Net Weight:
3.5” x 19” x 13.25”
(89 mm x 483 mm x 337 mm)
12.5 lb (5.7 kg)
Windows® ‘95, ‘98, NT®, 2000, XP
Pentium® or faster
16MB minimum, 32MB recommended
10MB free disk space
800 x 600 pixels, 256 colors minimum
20 Hz–20 kHz, variable frequency
Range: 0 dB to –20 dB
NOM On/Off
Gate Attenuation Depth: 0 dB to –60 dB
Gate Release Time: 0.5 s or 1.5 s
Range: 0 dB to –20 dB
None, Last, Input 1
20 Hz–20 kHz, variable frequency
(20 Hz–20 kHz bandwidth, Master Out, channel Trims @ unity gain, channel EQs
flat, all odd channels panned left, even channels panned right, Master Level @
Unity, Channel Levels @ Unity:
–82 dBu
Single Channel to Master Out:
–100 dB
(reference to 1% THD+N)
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
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8x2 Digital Mixer and Signal Processor
front panel manual
adjustments via UP/
A/B/Lockout selector
12 segment
LED ladders
Extra Bus A and B
input trim controls
Front panel RS232 port
Rear panel RS 232 Port
Universal Power Input
90-240 volt 50/60Hz
power input
Extra inputs fed
directly to Bus A and B
Input Phoenix-type
Recording output
from Bus A and B
Individual 48 VDC phantom
power selectors for each
mic input channel
control bus
Logic I/O expansion
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
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Main Bus
A & B outputs
8x2 Digital Mixer and Signal Processor
The DX8 is supplied with a real-time PC
software application that allows access
to all of the unit’s features. The user interface employs a mixer metaphor, making
settings and operation clear and intuitive.
Several of the mixer’s elements are fixed,
allowing immediate access to Master
output controls, Preset selection and editing, as well as Active Device selection.
Indicators for Active Logic Inputs and
Mute Groups are always visible, as are
the input and output signal meters. Mixer,
equalizer, compressor, automix, and setup
screen views are recalled from directselect buttons.
The DX8 Mixer view offers two faders for each input
The DX8 Automix view includes an Automatic
Level Control and a Gate control
The DX8 has a full-featured Compressor for each
The DX8 Graphic EQ view offers 31 bands of control on ISO-centered frequencies for each of the
two master outputs
The DX8 Parametric EQ view includes 5 bands of
control, as well as display windows that graphically represent the selected curves
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX 425.485.1152 | Page 4 of 6
8x2 Digital Mixer and Signal Processor
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX 425.485.1152 | Page 5 of 6
8x2 Digital Mixer and Signal Processor
(Also known as “A&E Specifications”)
The following are “Part 2 Products” CSI-type specifications. It is assumed that “Part 1 General – Administrative and Procedures” and
“Part 3 Execution – Installation and Maintenance” are part of an overall audio system or project specification.
Approved Manufacturer/Product
A. EAW Commercial, One Main Street, Whitinsville, MA 01588 USA, USA
B. Model number:
A. Configuration:
8-channel digital audio mixer
1. Inputs:
a. Eight balanced mono mic inputs (Eight 3-pin Phoenix-type connectors)
b. Ten balanced mono line inputs (Ten 3-pin Phoenix-type connectors)
2. Outputs:
a. Two balanced line outputs (Two 3-pin Phoenix-type connectors)
b. Eight unbalanced direct line outputs (one DB15 connector)
c. Two unbalanced RECORD outputs (two RCA line-level output jacks)
3. Other
a. Ten logic inputs and ten logic outputs (one DB25 connector)
b. One remote bus connector (one 3-pin Phoenix-type connector)
c. Two RS-232C serial ports (two DB9 connectors)
B. Powering Mode
1. Internal AC power supply, 90 - 240 VAC, 50/60 Hz, 1 A
2. External DC power supply, 22 - 28 VDC, 3 A
Electrical Properties
A. Frequency Response (± 0.5 dB):
20 Hz to 20 kHz
B. Total Harmonic Distortion (20 Hz to 20 kHz @ 0 dBu output):
< 0.005%
C. Noise (20 Hz to 20 kHz BW, 150 ohm source impedance):
1. Equivalent Input Noise (EIN):
–129.5 dBm unweighted
2. Output Noise
a. Master level at unity, channel levels at unity:
–82 dBu
b. Single channel to Master out:
–100 dBu
D. Common Mode Rejection (@ 1 kHz, Gain at maximum):
80 dB
Crosstalk (@ 1 kHz, any input to adjacent direct output):
–90 dB
Input Gain Control Range:
1. Mic In:
0 dB to +60 dB
2. Line In:
–30 dB to +30 dB
G. Phantom Power: +48 VDC @ 7 mA per input channel
H. Rated Output:
1. Nominal Output: +4 dBu
2. Maximum Output: +18 dBu
Physical Properties
A. Dimensions
1. Height:
2. Width:
3. Depth:
B. Weight
1. Net Weight:
3.5 in/89 mm
19 in/483 mm
13.25 in/337 mm
LOUD Technologies Inc. continually engages in research related to product improvement. New material,
production methods, and design refinements are introduced into existing products without notice as a routine
expression of that philosophy. For this reason, any current EAW Commercial and LOUD Technologies product
may differ in some respect from its published description, but will always equal or exceed the original design
specifications unless otherwise stated. ©1999–2004 LOUD Technologies Inc. All rights reserved.
EAW Commercial is a trademark of LOUD Technologies Inc.
12.5 lb/5.7 kg
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX 425.485.1152 | Page 6 of 6
Part No. 0009774 Rev. B 07/04