EAW DX8 User manual

Part No. 0009774 Rev. C 05/07
DESCRIPTION
The DX8 is a digital audio mixer and processor for installations such
as churches, courtrooms, convention centers and hotels. Eight
universal inputs and two balanced outputs allow true 8x2 mixing for
stereo or dual zone applications. The DX8 includes powerful signal
processing software to complement the 8x2 mixing structure. An
automixing function serves applications requiring little or no human
operation. Optional software and hardware further expands the
DX8’s capabilities for more sophisticated needs.
Each of the eight input channels can be terminated to one of two
Phoenix-type detachable connectors, each optimized to accept
either microphone or line-level signals. Mic preampliers use XDR™
technology for studio-quality audio. Phantom power (48VDC) is
switchable individually on each mic input. Two auxiliary line-level
inputs with trim allow analog signals to be mixed with A and B
master mixes. Master outputs deliver balanced line-level signals to
the Phoenix-type connectors as well as buered unbalanced signals
to RCA connectors (for recording).
The intuitive front panel interface includes dual-function LED
bargraph meters for each input and output. Input meters show
signal presence before signal processing (pre-fader) and output
meters indicate actual level at the output (post-fader). Levels are
set with UP/DOWN buttons for each input and output. A MODE
button selects between Mix A and B for level adjustment to both mix
outputs from the same input controls, and it also allows the user
to lock front panel controls until a security code is entered.
The DX8 oers exible interface options for control and
programming purposes. Two independent RS232 connectors - one
on the front panel and one on the rear - provide 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 programmable. A proprietary remote control bus
connects optional DX8 wired remotes over a three-conductor cable.
These remotes, available in volume control and four-switch versions,
can be combined in any conguration.
Supplied PC software provides access to all settings and
congurations. It oers Stereo and Mono mixer views, and access
to the two 1/3-octave equalizers, two 5-band parametric equalizers
and two compressors on the two master outputs. It also allows
conguration and recall of up to 16 presets, 8 input Priority levels,
8 Mute groups and 8 Control groups. Force On and O functions are
provided with choice of Relative or Absolute changes that can be
used with Priority settings to create advanced audio management
systems. All settings and text labels are retained in the DX8 and
stored to the computer.
The DX8 is UL and CE approved for continuous use in professional
audio systems. An internal auto-ranging power supply allows
connection to mains voltages from 90–240VAC at 50/60Hz without
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.
DX8
8X2 DIGITAL MIXER AND SIGNAL PROCESSOR
• 32-bit DSP and 24-bit Analog/Digital Conversion
• 8 balanced XDR™ Mic/Line inputs with trim
• 2 balanced Line inputs direct to mix bus
• 2 Independent Mix Buses and balanced Outputs
• 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 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
• 48VDC Phantom Power switch per input
• 24VDC Backup Power input
• Hardware Expansion Port accepts optional modules
• PC Software application included
Features
• Meeting Rooms • Hotels
• Houses of Worship • Boardrooms
• Courtrooms • Multi-Purpose Facilities
• Multizone Paging/
Music Systems
Applications
Eastern Acoustic Works | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX [phone] | Page 1 of 5

Part No. 0009774 Rev. C 05/07
DX8
8X2 DIGITAL MIXER AND SIGNAL PROCESSOR
Eastern Acoustic Works | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX [phone] | Page 2 of 5
INPUTS / OUTPUTS
Inputs 1-8: Balanced, Phoenix-type terminals
Bus A and B: Balanced, Phoenix-type terminals,
direct to Mix Buses
Master Outputs: Balanced, Phoenix-type terminals
Record Outputs A/B: Unbalanced, RCA
Direct Outputs 1-8: Unbalanced on DB15
(bottom row is return)
Logic Inputs: 10 inputs on DB25
Logic Outputs: 10 open-collector outputs on DB25
Serial Ports:2 RS-232C on DB9
CONTROLS
Input Trim:8 Rotary potentiometers
Input Gain:2 Pushbuttons per input
EQ:2 Pushbuttons for low, 2 for high
Master Output Gain:2 Pushbuttons per output
Mode Select: 1 Pushbutton
Power: Rocker switch
Phantom Power Select:8 DIP switches
INDICATORS
Input Levels:12-segment LEDs per ch.
EQ Levels:12-segment LEDs per ch.
Mode Status:3 LEDs; A/B/LOCK
Output Levels:12-segment LEDs per ch.
Volume Setting:12-segment LED bar graph
ELECTRICAL
AC Power: 90–240 VAC, 50/60 Hz, 1A
DC Power: 24 VDC, 3A
Fuse Ratings:1.6A Slo Blo, 250V
SIGNAL PROCESSING
Five, 32-bit floating point DSPs, 24-bit
converters,
512k x 16 Flash, 128k x 32 SRAM (battery back-up)
Inputs:
3-band shelving/peaking EQ:20 Hz–20 kHz, variable frequency
Automatic Level Control (ALC)Range: 0 dB to –20 dB
Automix: NOM On/Off
Gate Attenuation Depth: 0 dB to –60 dB
Gate Release Time: 0.5 s or 1.5 s
Outputs:
Automatic Level Control (ALC)Range: 0 dB to –20 dB
Automix MAC NOM: 1-8
Automix Last Mic On:None, Last, Input 1
2-band shelving EQ:20 Hz–20 kHz, variable frequency
1/3-Octave graphic EQ
5-band parametric EQ
Compressor/limiter
AUDIO
Noise
(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)
Total Harmonic Distortion (THD+N)
(1 kHz @ +10 dBu {unity level} 20 Hz–20 kHz)
Mic in to Master Out:Below 0.005%
Crosstalk
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
Impedances
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
PHYSICAL
Dimensions (HxWxD): 3.5” x 19” x 13.25”
(89 mm x 483 mm x 337 mm)
Net Weight: 12.5 lb (5.7 kg)
PC SYSTEM REQUIREMENTS
OS: Windows® ‘95, ‘98, NT®, 2000, XP
Processor: Pentium® or faster
RAM:16MB minimum, 32MB recommended
Storage: 10MB free disk space
Display:800 x 600 pixels, 256 colors minimum
LED METER VALUES
1. Red (scale: OL): >–2dB full-scale (>16dBu)
2. Yellow (scale: 2): >–4dB full-scale (>14dBu)
3. Yellow (scale: 4): >–7dB full-scale (>11dBu)
4. Yellow (scale: 7): >–10dB full-scale (>8dBu)
5. Green (scale: 10): >–15dB full-scale (>3dBu)
6. Green (scale: 15): >–20dB full-scale (>–2dBu)
7. Green (scale: 20): >–25dB full-scale (>–7dBu)
8. Green (scale: 25): >–30dB full-scale (>–12dBu)
9. Green (scale: 30): >–35dB full-scale (>–17dBu)
10. Green (scale: 35): >–40dB full-scale (>–22dBu)
11. Green (scale: 40): >–50dB full-scale (>–32dBu)
12. Green (scale: 50): >–60dB full-scale (>–42dBu)

Part No. 0009774 Rev. C 05/07
DX8
8X2 DIGITAL MIXER AND SIGNAL PROCESSOR
Eastern Acoustic Works | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX [phone] | Page 3 of 5
B
REMOTE BUS
TRIM
BUS A
U
+20-20
A
TRIM
1
RECORD
AB
OUTPUTS
LOGIC I/O
TRIM
BUS B
U
+20-20
TRIM
2TRIM 3TRIM 4TRIM 5TRIM 6TRIM 7TRIM 8
M
I
C
G
A
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N
060
–
+
SERIAL NUMBER MANUFACTURING DATE
COMM PORT
DIRECT OUTPUTS
12345678
POWER
INPUT
22 - 28V DC,
3A MAX
2 3 4 5 6 7 81
–
+G
G+
–
MIC
LINE
LINELINELINE
MIC
LINE
MIC
LINE
MIC
LINE
MIC
LINE
MIC
LINE
MIC
LINE
MIC
LINE
MIC
-
30dB +30dB
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30dB +30dB
U
PHANTOM POWER
48V DC
12 1 +5V
11G 1
G+
–
G+
–
G+
–
INPUTS
OUTPUTS
100 – 240V , 50/60Hz, 1A MAX
LISTED COMMERCIAL
AUDIO EQUIPMENT
9Z39
R
DX8 DIGITAL MIXER
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A B LOCK
MODE
POWER
COMM PORT
1 2 3 4 5 6 7 8 HILO EQ BA MASTER
DX8 DIGITAL MIXER
Universal Power Input
90-240 volt 50/60Hz
24VDC
power input
Direct outputs Extra Bus A and B input trim controls Rear panel RS 232 Port
Extra inputs fed
directly to Bus A
and B
Main Bus
A & B outputs
Input Phoenix-type
terminals
Individual 48 VDC phantom
power selectors for each
mic input channel
Recording output
from Bus A and B
Logic I/O
expansion port
Remote
control
bus
front panel manual adjustments
via UP/DOWN pushbuttons
12 segment
LED ladders
A/B/Lockout selector Front panel RS232 port

Part No. 0009774 Rev. C 05/07
DX8
8X2 DIGITAL MIXER AND SIGNAL PROCESSOR
Eastern Acoustic Works | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX [phone] | Page 4 of 5
DX8 SOfTwARE fOR THE PC
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 xed,
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
direct-select buttons.
The DX8 Mixer view oers 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 output
The DX8 Graphic EQ view oers 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

Part No. 0009774 Rev. C 05/07
DIRECT
OUTPUT
CHANNEL 1
32-BIT DSP
CHANNELS 2-8
(IDENTICAL TO CH 1)
INPUT METER INTERNAL DIGITAL
BUSES
ADC
24-BIT
PHANTOM POWER
+48 VDC
DAC
24-BIT
31-BAND GRAPHIC EQ 5-BAND PARAMETRIC EQ
MUTE ALC
AUTO
ALC
AUTO
A
B
TRIM
+5V
PC
OR OTHER
CONTROL
DEVICE
(OPTIONAL)
PC
OR OTHER
CONTROL
DEVICE
(OPTIONAL)
REMOTE
CONTROL
(OPTIONAL)
DX8
OR
eNET16
HUB
(OPTIONAL)
eNET16
CARD
(OPTIONAL)
MUTE
LO-SHELF EQ HI-SHELF EQ
OUTPUT METER
MIC
LINE
A B
INTERNAL ANALOG
BUSES
A B
DAC
24-BIT
31-BAND GRAPHIC EQ 5-BAND PARAMETRIC EQ MUTE
LO-SHELF EQ HI-SHELF EQ
COMPRESSOR COMPRESSOR
OUTPUT METER
RECORD
OUTPUTS
A
OUTPUT
B
OUTPUT
A
B
BUS A
INPUT
LOGIC
IN
(1 OF 10)
FRONT PANEL
COMM PORT
REMOTE
CONTROL
BUS B
INPUT
TRIM TRIM
+5V
LOGIC
OUT
(1 OF 10)
CONTROL
PROCESSING
REMOTE
CONTROL
(OPTIONAL)
TO ADDITIONAL
REMOTE CONTROLS
(OPTIONAL)
REAR PANEL
COMM PORT
EAW Commercial DX8 W/AUTOMIX BLOCK DIAGRAM (5/15/03 DF)
3-BAND INPUT EQ
AUTOMIX
GAIN CONTROL
GATE
ALC
AUTOMIX
GAIN CONTROL
GATE
ALC
ALC
ALC
ALC
ALC
DX8
8X2 DIGITAL MIXER AND SIGNAL PROCESSOR
Eastern Acoustic Works | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX [phone] | Page 5 of 5