PRELIMINARY D
ATA
EASTERN ACOUSTIC WORKS
One Main Street, Whitinsville, MA 01588 • (508) 234 - 6158 • FAX (508) 234 - 8251 • Email [email protected] • Web http://www.eaw.com
EAW products are continually improved. All specifications are therefore subject to change without notice. • PUB# 888xxx(A) MX8750/2 PP Feb2001 • Printed In USA
TECHNICAL SPECIFICATIONS
MX8750
DESCRIPTION
The MX8750 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 with fully controllable
confiuration and signal processing functions. It is designed for use
in single or two channel modes with bi-amplified and tri-amplified
loudspeakers along with subwoofers. The MX8750 has two input
channels each with eight outputs that can be configured in any
combination of input to output. Its functions include crossover
filters, parametric equalization, shelving EQ, HP and LP filters, de-
lay, polarity and limiting. The range and quantity of processing
finctions assures being able to achieve optimum system perfor-
mance. The MX8750 is controlled by using EAW software and a
Windows PC with an RS-232 or midi interface. There is a full comple-
ment of level and status indicatores plus individual output mutes
for setting-up and troubleshooting systems.
FEATURES
- Fully controllable configurations and signal processing func-
tions
- Digital processing for precise settings
- 6 bands of parametrice EQ on each input, 5 on each output
and 7 crossover types ensure optimum performance
- Each EQ band is selectable between full parametric or first and
second order hi/lo shelving filters
- 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 MX8750
processor is capable of providing complex asymetrical crossovers,
delay compensation, parametric equalization, LPF ands HPF filter-
ing, shelving EQ and limiting. While all parameters are fully ad-
justable, the MX8750 can be configured using factory-determined
settings for a particular loudspeaker system.
CONFIGURATIONS
The MX8750 processor is 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 correctly 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, 1db 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
