PRELIMINARY D
ATA
EASTERN ACOUSTIC WORKS
One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email info@eaw.com • Web http://www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. • PUB# 888xxx(A) MX8700/2 PP Feb2001 • Printed In USA
SPECIFICATIONS
MX8700
DESCRIPTION
The MX8700 Digital Electronic Processor is designed to optimize
the performance of a wide range of EAW loudspeakers. It is a cost
effective, single-rack space, processor designed for use with bi-
amplified and tri-amplified loudspeakers with special facilities for
adding two channel or mono-summed subwoofers. The MX8700
has two input channels each with four outputs. Its functions in-
clude crossover, equalization, delay, polarity and limiting. Con-
figurations are downloaded to the MX8700 using EAW Windows soft-
ware via an RS-232 interface. Once downloaded, confirgurations
cannot be altered by the end user removing the burden of field set-
up and assuring optimum loudspeaker performance. There is a full
complement of level and status indicatores plus individual output
mutes for setting-up and troubleshooting systems.
FEATURES
- Parameters fully protected from tampering
- Digital processing for precise settings
- 6 bands of parametrice EQ on each input, 5 on each output
and 7 crossover types ensure optimum performance
- Active balanced input and outputs with XLR connectors
CLOSE COUPLED ELECTRONIC PROCESSING
TM
The concept of Closed Coupled Electronic Processing
TM
(CCEP
TM
) is
central to the EAW design process. EAW engineers integrate elec-
tronic signal processing into the total loudspeaker system but we
recognize that electronics can only improve performance after all
other electro-mechanical factors have been optimized. The MX8700
processor incorporates functions such as complex asymetrical cross-
over filters, delay compensation and parametric equalization. All
of these parameters are configured for a particular loudspeaker sys-
tem in an interactive design process using EAW’s rapid data acqui-
sition faciltiy and in-house multi-platform computer network.
CONFIGURATIONS
The MX8700 processor is either factory or field configured
(Close Coupled
TM
) for a particular EAW loudspeaker system.
If you have any questions please contact an authorized EAW
sales agent or the factory to be certain that you have cor-
rectly configured the processor to your system.
SPECIFICATIONS
Input Type
Two (2): Active balanced
Input Impedance
18k Ohms
Max. Input Level
+20dBu
Output Type
Eight (8): Active balanced
Output Impedance
112 Ohms
Max. Output Level
+20 dBu
Frequency Response
±
.25dB, 20Hz-20kHz
Total Harmonic Distortion
<.01% @ 1kHz, +20dBu
Dynamic Range
.110dB, 2-20kHz, unweighted
Output Noise
<-90dBu, unweighted
EQ Filters
EQ Filter Type
Parametric Bell and Shelving (6dB/
oct. & 12dB/oct.)
EQ Filter Number
6 per input, 5 per output
Q
.25 to 64
EQ Frequency Resolution
1/24 octave
Level Range
+15/-30dB, 0.1dB increments
Crossover Filters
Crossover Filter Type
Butterworth, Bessell,Linkwitz-Riley
Slope
12dB/oct., 18dB/oct., 24dB/oct.
Number
2 per output
Frequency Resolution
1/24 octave
Level Range
+12dB/-infinite, 0.1dB increments
Limiter
Limiter Threshold
-20dBu to +20 dBu, idb increments
Limiter Ratio
1.2;1, 1.5;1, 2;1, 3;1, 4:1, 6;1, 10:1,
20;1, inf:1
Limiter Attack
1 ms/dB, 100 ms/dB, 500 ms/dB
Limiter Release
20 ms/dB, 100 ms/dB. 500 ms/dB
Delay
Input Delay
300 msec max., 1 msec increments
Output Delay
20 msec max., 20 us increments
Digital Processing
A/D converters
24 Bit, 128x oversampling
D/A Converters
24 bit, 128x oversampling
Sample rate
48kHz
DSP Processing
24 Bit, 56 Bit Accumulator, 200
MIPs
Propagation Delay
1.46 msec
