8 3 4 / 8 3 5
S
E R I E S I I
I
NTRODUCTION
The DOD 834 Series II is a stereo 3-way, mono 4-way crossover, and the 835
Series II is a stereo 2-way, mono 3-way crossover. These high-quality
crossover networks are designed to extract maximum sound quality from
your multi-amped sound system at a price working musicians can afford.
Accurate state-variable, 18 dB/octave Butterworth filters prevent peaks or dips
in the output at crossover points, ensuring good driver protection by rolling
off crossover frequencies rapidly.
A two-pole, high-pass filter may be electronically inserted at 40 Hz using a
switch on the front panel (834 only), and a variable low frequency summed
output is available for mono subwoofer applications.
The rear panel of the 834/835 is clearly labeled for stereo and mono opera-
tion, and all outputs on the 834 except the mono Low Frequency Sum output
include phase switches.
ADVANTAGES OF A MULTIPLE AMPLIFIER SYSTEM
Multi-amped systems use separate amplifiers for each frequency band, allow-
ing each amplifier to deliver maximum efficiency within a specified range.
This method of amplification yields a cleaner overall sound and a significant
decrease in the amount of power needed to drive the system to the same lev-
els as a full-range amplified system with more power.
The greatest power demands in a sound system are made by the low fre-
quencies of the program material. This is because music and voice signals
contain mostly low frequency information, and low frequency drivers are gen-
erally less efficient than high frequency transducers.
In a multi-amped system, the power amplifier(s) for the low frequencies can
be large enough to handle greater power demands, allowing high frequency
MODE
GAIN
+15
0
dB
GAIN
dB
CHANNEL
ONE
LOW LEVEL
LOW LEVEL
-
∞
0
dB
HIGH LEVEL
-
∞
0
LOW / MID
FREQUENCY
LOW / HIGH
FREQUENCY
500
1,000
100
750
250
x10
RANGE
RANGE
GAIN
+15
0
dB
-
∞
MID LEVEL
LOW LEVEL
0
dB
CHANNEL TWO
HIGH LEVEL
dB
HIGH LEVEL
-
∞
0
MID / HIGH
FREQUENCY
500
1,000
100
750
250
LOW / HIGH
FREQUENCY
RANGE
RANGE
x10
835
series
II
stereo crossover
MONO
STEREO
MONO
834
series
II
stereo crossover
MONO
STEREO
HIGH PASS
40 Hz
HIGH PASS
+15
0
GAIN
dB
GAIN
-
∞
0
LOW
dB
LOW LEVEL
dB
MID LEVEL
0
-
∞
dB
0
-
∞
HIGH LEVEL
LOW/LOW-MID
FREQUENCY
Hz
250
500
50
375
125
LOW / MID
FREQUENCY
RANGE
RANGE
x10
kHz
3.7
7.5
.75
5.6
1.9
MID / HIGH
FREQUENCY
40 Hz
HIGH PASS
+15
0
dB
GAIN
-
∞
0
dB
LOW-MID
LOW LEVEL
-
∞
0
dB
MID LEVEL
HIGH-MID
dB
0
-
∞
HIGH LEVEL
HIGH
Hz
250
500
50
375
125
LOW-MID/HIGH-MID
FREQUENCY
LOW / MID
FREQUENCY
RANGE
RANGE
x10
kHz
HIGH-MID/HIGH
FREQUENCY
MID / HIGH
FREQUENCY
10
20
15
2
5
.75
1.9
3.7
5.6
7.5
MODE
MONO
CHANNEL TWO
CHANNEL ONE
1 1
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