SR835 Crossover
A Harman International Company
SR835 Crossover
INTRODUCTION
Congratulations,and thank you for your purchase of the DOD SR835 Crossover.
The SR835 is a high quality sound reinforcement tool capable of providing your
PA or sound reinforcement system with speaker protection and the increased
clarity and efficiency that results when bi-amping, or tri-amping.
1
So what is bi-amping, and tri-amping? A bi-amped system means you are using
two power amps to drive separate ranges of frequencies.The crossover is doing
a two way split, separating the high frequencies from the low frequencies and
directing the two ranges to different outputs. One amp receives the low fre-
quencies,and powers your bass speakers.The other power amp receives the high
frequencies and powering the horns, or high frequency speakers.Tri-amping uses
three power amps because the crossover is separating the lows, mids, and highs
from each other.
The SR835 is capable of 2 way splits(bi-amp) in stereo, and three way splits (tri-
amp) in mono.The SR835 uses Butterworth state variable filters providing an 18
dB per octave slope for the selected crossover frequency. This means that if you
have selected the crossover frequency to be 500Hz for instance, the signal com-
ing out of the the low frequency output will loose 18 dB of signal for every
octave above 500 Hz. Likewise, the high frequency output will lose 18 dB of sig-
nal for every octave below 500 Hz.
This Owner’s Manual is your guide to understanding how to get the most out of
the SR835. Please read it carefully and familiarize yourself with the controls on
the SR835. By doing so, you will be assured to increase the over all efficiency of
your system for years to come.
Your SR835 was carefully assembled and packaged at the factory. Before contin-
uing any further, please make sure the following items have been included:
1 SR835
1 Owners Manual
1 Warranty Card
1 Detachable Power Cord
Please take a moment to fill out the warranty card. It is your safe guard in the
unlikely event that your unit requires servicing. Please save all packing materials
and use these materials to return the product if servicing is required.
SR835 Crossover
2
FRONT PANEL
1
2
3
4
5
6
7
8
9
10
11 12
1. Power Switch - Used to engage or disengage the power to the SR835.
2. Mono/Stereo Switch - This switch configures the SR835 as two indepen-
dent channels of 2 way splits, or one channel with a 3 way split.When the switch
is in and the LED is lit, the SR835 is in Mono mode.
3. Gain - This is the input level for Channel 1 in Stereo mode, and is the mas-
ter input level in Mono mode.
4. Low Level -This knob controls the volume for the low frequency output in
both Stereo and Mono modes.
5. High Level -This knob controls the volume for the Channel 1 high frequen-
cy output in Stereo mode, and has no function in Mono mode.
6. Frequency - This knob sets the crossover frequency separating the lows
from the mids in Mono mode, and the lows from the highs for Channel 1 in
Stereo mode.
7. Range Switch - When depressed, this switch will multiply the selected
crossover frequency by 10.The LED will light indicating that the markings on the
Frequency knob (6) should be multiplied by 10.
8. Channel 2 Gain - This is the input level for Channel 2 in Stereo mode. In
Mono mode this knob has no function.
9. Low/Mid Level - This knob controls the volume for the Channel 2 low fre-
quency output in Stereo mode, and the mid-range frequency output volume in
Mono mode.
10. High Level - This knob controls the volume for the Channel 2 high fre-
quency output in Stereo mode, and the high frequency output in Mono mode.
11. Frequency - This knob sets the crossover frequency separating the mids
from the highs in Mono mode, and the lows from the highs for Channel 2 in
Stereo mode.
12. Range Switch - When depressed, this switch will multiply the selected
crossover frequency by 10.The LED will light indicating that the markings on the
Frequency knob (11) should be multiplied by 10.
SR835 Crossover
3
REAR PANEL
120
100
V
V
60 Hz
OR
50 Hz
WARNING: SHOCK HAZARD-DO NOT OPEN
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
CAUTION: TO REDUCE THE SK OF ELECTRIC SHOCK DO NOT REMOVE BACK. NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
AVIS: RISQUE DE CHOC ÉLECTRIQUE-NE PAS OUVRIR
HIGH BAL.
HIGH UNBAL.
LOW BAL.
LOW UNBAL.
STEREO
INPUT
LOW SUM OUT
HIGH BAL.
HIGH UNBAL.
LOW BAL.
LOW UNBAL.
STEREO
INPUT
CHANNEL
2
CHANNEL
1
DOD Professional Products
Sandy,Utah U.S.A.
MONO HIGH BAL.
HIGH UNBAL.
MID BAL.
MID UNBAL.
LOW BAL.
LOW UNBAL.
18 WATTS
MONO
1
2
3
4
5
6
7
8
9
10
11
12
1. High Bal - This is a TRS balanced output for the high frequencies in both
Mono mode and Channel 2 in Stereo mode.
2. High Unbal - This is an unbalanced out put for the high frequencies in both
Mono mode and Channel 2 in Stereo mode.
3. Low/Mid Bal -This is aTRS balanced low frequency output for Channel 2 in
Stereo mode and a TRS balanced mid range frequency output in Mono mode.
4. Low/Mid Unbal -This is an unbalanced low frequency output for Channel 2
in Stereo mode and an unbalanced mid range frequency output in Mono mode.
5.Channel 2 Input -This is aTRS balanced input for Channel 2 in stereo mode.
This jack has no function in Mono mode.
6. Low Sum Output -This is a mono output containing the sum of Channel 1
and Channel 2 low frequencies.
7. High Bal - This is a TRS balanced high frequency output for Channel 1 in
Stereo mode.This jack has no function in Mono mode.
8. High Unbal - This is an unbalanced high frequency output for Channel 1 in
Stereo mode.This jack has no function in Mono mode.
9. Low Bal - This is a TRS balanced low frequency output in both Mono mode
and Channel 1 in Stereo mode.
10. Low Bal - This is an unbalanced low frequency output in both Mono mode
and Channel 1 in Stereo mode.
11. Channel 1 Input - This is a TRS balanced input for Channel 1 in stereo
mode and the master input in mono mode.
12. Power Receptacle - Connect the provided power cord from this recepta-
cle to an AC outlet.
SR835 Crossover
INSTALLATION
4
Install the crossover in a rack with the provided rack screws. Route the AC
power cord to a convenient power outlet away from audio lines. The unit may
be turned on and off using the front panel power switch. Since the units draw a
relatively small amount of current during idle, they can be left on continuously.
DOD crossovers generate very little heat during operation and thus do not
need to be specially ventilated or cooled. The units should not, however, be sub-
jected to high temperatures for extended periods. Although the unit's chassis is
shielded against radio frequency and electromagnetic interference, extremely
high RF and EMI fields should be avoided.
ATTENTION: Use only one Channel output connector for each frequency
range at a time. Using the balanced and unbalanced outputs for the same fre-
quency range at the same time can unbalance balanced lines, cause phase can-
cellation, short a conductor to ground, or cause damage to other equipment
connected to the crossover.
FOR BALANCED 1/4 “ TRS PHONE PLUG CONNECTION - Wire the con-
nectors as follows:
Phone Plug
Connection
tip
: high
ring
sleeve
: low
: ground
FOR 1/4" MONO PHONE PLUG CONNECTION:
Phone Plug
tip
Connection
: high
sleeve
: ground
Once the crossover has been installed and adjusted for the required cross fre-
quencies, and levels, an optional security panel can be installed to keep unautho-
rized persons from changing settings.
SR835 Crossover
BI-AMP APPLICATIONS
For bi amp applications, the SR835 must be set to the Stereo mode regardless of
whether you are running in stereo or mono. The Stereo mode configures the
SR835 as two individual channels, each providing a two way split. If you are run-
ning your sound system in stereo, both channels would be used: one for the left,
and one for the right. If you are running in mono, only one of these channels
would be used but the SR835 would still be set to Stereo mode in order to
achieve a two way split. The following procedure outlines the steps for running
a bi-amped system in mono. Begin these steps with the power to the SR835
turned off.
5
1. Make sure the Mono Mode switch on the front panel of the SR835 is in the
“out” position. The LED next to this switch should be off.
2. Turn the Channel 1 Gain knob to 0 (fully counterclockwise).
3. Set the Channel 1 Low and High Level knobs to - infinity (fully counterclock-
wise clockwise).
4. Connect from the output of the mixer or source signal to the Channel 1 input
of the SR835.
5. Connect from the Channel 1 Low Bal (for balanced lines), or Low Unbal (for
unbalanced lines) to the input of the power amp driving the bass speakers.
6. Connect from the Channel 1 High Bal (for balanced lines), or High Unbal (for
unbalanced lines) to the input of the power amp driving the horns or high fre-
quency speakers.
7. Consult the manufacturers specifications for your speakers to determine the
proper crossover frequency. This will usually be listed as the frequency
response or frequency range of your high frequency speakers or horns. Set
the Channel 1 Frequency knob slightly higher than the lowest specified fre-
quency.
Note: The markings on the SR835 Frequency knob range from 100 Hz. to 1000
Hz..The push button switch to the left of the Frequency knob will multi-
ply these frequencies by 10 extending the range from 1000 Hz. to 10,000
Hz..
8.Apply power to your mixer,then to the SR835,and finally to your power amps.
Begin sending signal through the system. Gradually turn up the High Level first
and confirm correct wiring.Turn up the Low Level to balance the tonality.Adjust
the Gain knob for appropriate signal strength.
Note: This procedure will also apply to Stereo bi-amping. Simply repeat steps2
through 7 for Channel 2.
SR835 Crossover
TRI-AMP APPLICATIONS
For tri amp applications, the SR835 must be set to the Mono mode. The Mono
mode configures the SR835 as one channels providing a three way split. If you
are running your sound system in stereo, you would need two SR835s in order
to run a Stereo tri amp configuration. The following procedure outlines the
steps for running a tri amped system. Begin with the power turned off.
6
1. Make sure the Mono Mode switch on the front panel of the SR835 is in the
“in” position. The LED next to this switch should be on.
2. Turn the Channel 1 Gain knob to 0 (fully counterclockwise).
3. Set the Channel 1 Low and the Channel 2 Mid and High Level knobs to - infin
ity (fully counterclockwise).
4. Connect from the output of the mixer or source signal to the Channel 1 input
of the SR835.
5. Connect from the Channel 1 Low Bal (for balanced lines), or Low Unbal (for
unbalanced lines) to the input of the power amp used to drive the bass speak-
ers.
6. Connect from the Channel 2 Mid Bal (for balanced lines), or Mid Unbal (for
unbalanced lines) to the input of the power amp used to drive the mid range
speakers.
7. Connect from the Channel 2 High Bal (for balanced lines), or High Unbal (for
unbalanced lines) to the input of the power amp used to drive the horns or
high frequency speakers.
8. Consult the manufacturers specifications for your speakers to determine the
proper crossover frequency for your mid range speakers. This will usually be
listed as the frequency response or frequency range. Set the Channel 1
Frequency knob slightly higher than the lowest specified frequency for the mid
range speakers.
9. Consult the manufacturers specifications for your speakers to determine the
proper crossover frequency for your high frequency speakers or horns. This
will usually be listed as the frequency response or frequency range. Set the
Channel 2 Frequency knob slightly higher than the lowest specified frequen-
cy.
Note: The markings on the SR835 Frequency knobs range from 100 Hz.to 1000
Hz..The push button switch to the left of the Frequency knob will multi-
ply these frequencies by 10 extending the range from 1000 Hz. to 10,000
Hz..
10. Apply power to your mixer, then to the SR835, and finally to your power
amps.
SR835 Crossover
7
Begin sending signal through the system. Gradually increase the High, then Mid,
and finally Low Levels in order checking for correct wiring.Then balance the
tonality of the source signal.You may also need to increase the Gain if a stronger
signal is required.
STEREO USING A MONO SUB-WOOFER
The setup procedure is the same as for the stereo bi amp application, except
that instead of connecting both low frequency outputs, connect only the Low
Frequency Sum output to the low frequency amplifier. Set both Channel 1 and
Channel 2 Low Level controls to the same level to ensure that both controls
contribute the same amount of signal to the Low Frequency Sum output.
MAINTENANCE AND SERVICING
There are NO user serviceable parts inside the units. Opening the chassis will
void the warranty. All service and repair must be performed by the factory or
an authorized service center for the warranty to remain in service.
Should a problem arise with the equalizer, please contact your authorized DOD
Electronics dealer for return/repair procedures.
SPECIFICATIONS
Frequency Response: 10Hz. to 22kHz +0/-0.5 dB.
THD+Noise: Less than 0.006%.
Signal-To-Noise Ratio: Greater than -90 dB
FilterType: 18 dB/octave Butterworth state-variable filters.
Crossover Frequencies -
Stereo: LOW/HIGH: 100 Hz to 10 kHz in two ranges. -
Mono: LOW/MID 100 Hz to 10 kHz in two ranges. MID/HIGH 100 Hz to
10 kHz in two ranges.
Input Impedance: 20 k Ω unbalanced, 40 K Ω balanced.
Maximum Input Level: +21 dBu (ref.: 0.775Vrms).
Output Impedance: 51Ω unbalanced/102 Ω balanced.
Maximum Output Level: +21 dBu (ref.: 0.775Vrms).
Dimensions: 19”(L) x 5”(W) x 1.75”(H).
Weight: 4.38 lbs.
SR835 Crossover
DOD WARRANTY
8
1. The warranty registration card must be mailed within ten days after pur-
chase date to validate this warranty.
2. DOD warrants this product, when used solely within the U.S., to be free
from defects in material and workmanship under normal use and service.
3. DOD Electronics liability under this warranty is limited to repairing or
replacing defective materials that show evidence of defect, provided the prod-
uct is returned through the original dealer, where all parts and labor will be
covered up to a period of three (3) years. The company shall not be respon-
sible for any consequential damage as a result of the products use in any cir-
cuit or assembly.
4. Proof of date of purchase is considered to be the burden of the consumer.
5. DOD reserves the right to make changes in design or make improvements
upon this product without incurring any obligation to install the same on
PRODUCTS PREVIOUSLY MANUFACTURED.
6. The foregoing is in lieu of all other warranties, either expressed or implied,
and DOD neither assumes nor authorizes any person to assume for it any
obligation or liability in connection with the sale of this product. In no event
shall DOD or its dealers be liable for special or consequential damages or
from any delay in the performance of this warranty due to causes beyond
their control.
DECLARATION OF CONFORMITY
Manufacturer’s Name: DOD Electronics Corporation
Manufacturer’s Address: 8760 S. Sandy Parkway
Sandy, Utah 84070, USA
declares that the products:
Product Name:
SR835
All
Product Options:
conform to the following product specifications:
Safety:
EMC:
EN 60065 (1993)
IEC65 (1985) with Amendments 1,2,3
EN 55013 (1990)
EN 55020 (1991)
Supplementary Information:
The products herewith comply with the requirements
of the LowVoltage Directive 73/23/EEC and the EMC
Directive 89/336/EEC as amended by directive
93/68/EEC.
DOD Electronics Corporation
President of DOD
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
Effective: 11/24/97
European Contact: Your Local DOD Sales and Service Office or
International Sales Office
8760 S. Sandy Parkway
Sandy, Utah 84070, USA
Tel (801) 568-7638
Fax (801) 568-7642
VISIT DOD ELECTRONICS ON THE WORLD WIDE WEB AT
HTTP://WWW.DOD.COM
DOD ELECTRONICS CORPORATION
8760 SOUTH SANDY PARKWAY
SANDY, UTAH 84070
TELEPHONE 801-566-8800
FAX 801-566-7005
INTERNATIONAL DISTRIBUTION
8760 SOUTH SANDY PARKWAY
SANDY, UTAH 84070
TELEPHONE 801-568-7638
FAX 801-568-7642
DOD IS A REGISTERED TRADEMARK OF HARMAN MUSIC GROUP INC.
© 1998 DOD ELECTRONICS CORPORATION
DOD 18-3844-A-01
PRINTED IN CHINA
|