Viper d1200.1 User Manual

d600.1  
model  
d1200.1  
CONGRATULATIONS  
Congratulations for choosing a Viper  
Audio power amplifier from Directed  
Electronics, the industry leader in high  
quality automotive security and audio  
equipment since 1990.  
delight the mobile sound enthusiast with  
years of high-quality audio reproduction.  
Viper Audio power amplifiers come with  
a two-year limited warranty if installed  
by an authorized Viper dealer. If not  
installed by an authorized dealer, Viper  
Audio power amplifiers are covered by a  
one-year, parts-and-labor limited  
warranty.  
With the introduction of Viper Audio  
power amplifiers, Directed Electronics  
continues to set new standards of  
performance, reliability, and affordability  
in the mobile electronics industry.  
Be sure to retain your original sales  
receipt and refer to the warranty section  
of this guide for full details about your  
coverage.  
Featuring high-efficiency MOSFET power  
supplies, flexible on-board crossovers,  
and state of the art audio design, Viper  
Audio power amplifiers will excite and  
TABLE OF CONTENTS  
Limited Two-Year Consumer Warranty . . . . . . . . . . . . . . . . . . . . . . . . .4  
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6  
Wire Connector Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7  
Front Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8  
Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9  
Top Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11  
Top Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12  
Speaker Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13  
Combining Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14  
Parallel Synced Gain Connections/Settings . . . . . . . . . . . . . . . . . . . . .15  
External Synced Bridged Connections/Settings . . . . . . . . . . . . . . . . . . .17  
Multiple Amplifier Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19  
Crossover Settings and Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . .20  
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21  
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© 2002 Directed Electronics, Inc  
LIMITED TWO-YEAR CONSUMER WARRANTY  
Directed Electronics, Inc. promises to the  
original purchaser, to replace this product  
should it prove to be defective in workman-  
ship or material under normal use, for a  
period of two years from the date of  
purchase by the dealer as indicated by the  
date code marking of the product  
PROVIDED the product was installed by an  
authorized Directed dealer. During this two -  
year period, there will be no charge for this  
replacement PROVIDED the unit is returned  
to Directed, shipping pre-paid. If the unit is  
installed by anyone other than an autho-  
rized Directed dealer, the warranty period  
will be one year from the date of purchase  
by the dealer as indicated by the date code  
marking of the product. During this one-year  
period there will be no charge for this  
replacement PROVIDED the unit is returned  
to Directed, shipping pre-paid. This warranty  
is non-transferable and does not apply to  
any unit that has been modified or used in a  
manner contrary to its intended purpose,  
and does not cover damage to the unit  
caused by installation or removal of the unit.  
This warranty is void if the product has been  
damaged by accident or unreasonable use,  
neglect, improper service or other causes  
not arising out of defects in materials or  
construction. ALL WARRANTIES INCLUDING  
BUT NOT LIMITED TO EXPRESS  
WARRANTY, IMPLIED WARRANTY,  
WARRANTY OF MERCHANTABILITY,  
FITNESS FOR PARTICULAR PURPOSE, AND  
WARRANTY OF NON-INFRINGEMENT OF  
INTELLECTUAL PROPERTY ARE EXPRESSLY  
EXCLUDED TO THE MAXIMUM EXTENT  
ALLOWED BY LAW, AND DIRECTED  
NEITHER ASSUMES NOR AUTHORIZES  
ANY PERSON TO ASSUME FOR IT ANY  
LIABILITY IN CONNECTION WITH THE  
SALE OF THE PRODUCT. DIRECTED HAS  
ABSOLUTELY NO LIABILITY FOR ANY AND  
ALL ACTS OF THIRD PARTIES INCLUDING  
ITS AUTHORIZED DEALERS OR  
INSTALLERS. Unit must be returned to  
Directed, postage pre-paid, with: consumer’s  
name, telephone number, and address,  
authorized dealer’s name and address, and  
product description. IN ORDER FOR THIS  
WARRANTY TO BE VALID, YOUR UNIT  
MUST BE SHIPPED WITH PROOF OF  
INSTALLATION BY AN AUTHORIZED  
DIRECTED DEALER. ALL UNITS RECEIVED  
BY DIRECTED FOR WARRANTY REPAIR  
WITHOUT PROOF OF DIRECTED DEALER  
INSTALLATION WILL BE COVERED BY THE  
LIMITED ONE-YEAR PARTS AND LABOR  
WARRANTY. Note: This warranty does not  
cover labor costs for the removal and rein-  
stallation of the unit. BY PURCHASING THIS  
PRODUCT, THE CONSUMER AGREES AND  
CONSENTS THAT ALL DISPUTES BETWEEN  
THE CONSUMER AND Directed SHALL BE  
RESOLVED IN ACCORDANCE WITH CALI-  
FORNIA LAWS IN SAN- DIEGO COUNTY,  
CALIFORNIA.  
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© 2002 Directed Electronics, Inc  
FEATURES  
Super-efficient Class D PWM design  
runs much cooler than conventional  
amps.  
Continuously variable 24 dB/  
octave low-pass crossover.  
Variable 20-50 Hz, 24 dB/octave  
High-speed MOSFET switching  
subsonic filter.  
power supply.  
Variable 12 dB bass EQ function.  
High-current complimentary MOSFET  
Variable phase adjustment.  
outputs stable into 1 ohm loads.  
Remote subwoofer level control  
Thermal, DC offset, reverse polarity,  
and short circuit protection with  
status LED.  
supplied.  
Variable input sensitivity optimizes  
match with different signal sources.  
Master/slave RCA jack functions  
support two amps bridged to one  
load.  
Gold-plated screw-block plugs and  
RCA jacks ensure maximum signal  
transfer.  
Top-mounted controls located under  
illuminated Viper snake logo trim  
piece.  
Rugged one-piece extruded heat  
sink finished with injection-molded  
mounting feet.  
WARNING  
High-powered car audio  
systems may produce sound  
pressure levels that exceed the  
threshold at which hearing loss may  
result.  
They may also impair a driver’s ability to  
hear traffic sounds or emergency vehi-  
cles. Use common sense and practice  
safe listening habits when listening to or  
adjusting your audio system.  
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© 2002 Directed Electronics, Inc  
INSTALLATION GUIDELINES  
1. Please read this owner’s manual  
carefully before installing this ampli-  
fier.  
terminal. Use a fuse or circuit  
breaker rated slightly more than the  
on-board fuse(s) of the  
amplifier(s). The gauge of power  
wire used should take into account  
the total current draw of the  
system, and the length of wire  
used. IASCA and other auto sound  
competition organizations have  
charts available for this; you can  
also find a chart in the MECP study  
guide. Minimum wire gauge recom-  
mendations for the individual ampli-  
fiers are listed on the specification  
page. Always use the same gauge  
wire for the amplifier ground that  
you use for the power wire. Be sure  
to examine the battery ground  
cable of the vehicle, and if neces-  
sary, upgrade it by adding an addi-  
tional ground wire that is the same  
gauge as the amplifier’s power  
wire. Remember, the amplifier can  
only deliver its rated output when it  
is not current limited by the power  
and ground supply wires.  
2. Disconnect the battery ground  
terminal prior to making any elec-  
trical connections.  
3. Check for any hazards or obstruc-  
tions such as gas tanks, fuel or  
brake lines, and wiring harnesses  
before mounting the amplifier.  
4. Pick a mounting location that will  
provide adequate access and venti-  
lation and protect the amplifier  
from heat, moisture, and dirt.  
5. Avoid sharp metal areas when  
routing cables to the amplifier, and  
run RCA cables away from the  
power cables and other potentially  
noisy car harnesses.  
6. The amplifier should be grounded  
with a short, heavy gauge wire  
connected directly to the car at a  
bare metal surface, preferably  
scraped body sheet metal. Do not  
use factory ground locations, seat  
bolts, or brackets that are  
spotwelded.  
8. This amplifier is designed to drive a  
speaker load that measures from 1  
to 4 ohms. Keep in mind that heat  
is the long-term enemy of automo-  
tive electronics and the lower your  
7. Always fuse your power connection  
within 8 to 10 inches of the battery  
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© 2002 Directed Electronics, Inc  
speaker load, the more heat is  
generated. For low-impedance  
speaker applications or restricted  
ventilation installations, an external  
cooling fan may be advisable.  
10. Due to the high-frequency MOSFET  
switching power supply, filtering the  
power cable is not generally  
required (remember that the amp  
can’t deliver full output if the power  
supply is restricted). Proper  
grounding of the signal source is  
mandatory for the amplifier to  
reach its performance peak. If the  
RCA inputs are not grounded  
adequately via the signal source,  
electrical noise from the vehicle  
may be picked up in the system.  
9. Battery and ground connections to  
the vehicle should be made with  
crimped ring terminals of the appro-  
priate size (surface area is what  
counts); soldering the terminals  
after crimping is also recom-  
mended.  
WIRE CONNECTOR PLUGS  
Power and speaker wire connections on  
Viper Audio power amplifiers are  
performed with the use of specially  
designed connectors that allow for ease  
of wire termination and installation  
convenience.  
2. Cut wires to the minimum length  
necessary.  
3. Trim the wire ends so bare wire  
does not protrude from the  
connector after termination.  
4. Always tighten the connector  
screws firmly at least twice, once  
during installation and once more  
before returning the car to the  
customer.  
Poor connections are a common cause  
of poor sound quality or amplifier perfor-  
mance. Making proper wire connections  
is paramount to a reliable, quality sound  
system.  
CAUTION: Over tightening the screws can cause them to  
strip, creating loose connections. Tighten the  
screws twice firmly for a permanent, solid connec-  
tion.  
Please follow these recommendations to  
ensure a problem free installation:  
1. Always use the proper gauge wire  
for the connector.  
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© 2002 Directed Electronics, Inc  
FRONT PANEL CONNECTIONS  
RCA Input Jacks -  
RCA Bridge Output Jack  
- This output  
1.  
Accepts line level  
3.  
4.  
5.  
outputs from head units or signal  
processors at voltages between  
150mV and 8 volts.  
sends an out-of-phase signal to a  
slave amplifier when connected in  
the External Synced Bridged combi-  
nation. (Refer to the Combined  
Amplifiers section of this guide.)  
RCA Sync Out/ Slave In Jack  
2.  
Sync Out - This RCA jack sends a  
Synced or in-phase gain matched  
output signal to a slave amplifier  
when connected in the Parallel  
Synced Gain combination. It is a  
Synced output when the  
slave/master switch is in the  
MASTER position only.  
Slave/Master Switch  
- Controls  
whether the amplifier is a slave or  
master when connected in  
combined amplifier configurations.  
(Refer to the Combined Amplifiers  
section of this guide.)  
Remote Sub Level Control  
- Controls  
the subwoofer amplifier gain  
controls from a remote location for  
ease of adjustment during listening.  
Slave In - This RCA jack accepts  
input from a master amplifier. It is  
for use in the Parallel Synced Gain  
and External Synced Bridged combi-  
nations. It is a slave input when the  
slave/master control switch is in  
the SLAVE position only.  
Warning: DO NOT connect a level control knob from other  
manufacturers to the Remote Sub Level Control of  
any Viper amplifier. Even though the connectors fit  
properly, the control knob and connector pin posi-  
tions may be different and the amplifier will be  
damaged.  
FIGURE 1—AMPLIFIER CONNECTIONS d600.1/d1200.1 FRONT  
2
1
3
4
5
8
© 2002 Directed Electronics, Inc  
REAR PANEL CONNECTIONS  
Remote Turn On  
1.  
- This terminal turns  
BREAKER to the positive terminal of  
the vehicle battery or the positive  
terminal of an isolated audio  
system battery.  
on the amplifier when (+) 12 volt is  
applied to it. Connect it to the remote  
turn on lead of the head unit or signal  
source. If a (+) 12 volt remote turn  
on lead is not available, a Remote  
Power Adapter (P/N #55000) can  
be used to supply a remote turn on  
signal. DO NOT connect this terminal  
to constant (+) 12 volt.  
WARNING: Always protect this power wire by installing a fuse  
or circuit breaker of the appropriate size within 12  
inches of the battery terminal connection.  
Ground -  
6.  
Connect this terminal  
directly to the sheet metal chassis  
of the vehicle, using the shortest  
wire necessary to make this  
connection. Always use wire of the  
same gauge or larger than the (+)  
12 volt power wire. The chassis  
connection point should be scraped  
free of paint and dirt. Use only  
quality crimped and/or soldered  
connectors at both ends of this  
wire. DO NOT connect this terminal  
directly to the vehicle battery  
ground terminal or any other  
factory ground points.  
Sub Out Terminals  
2.  
3.  
- Connect  
subwoofers to these terminals.  
(Refer to the Speaker Wiring  
Diagrams section of this guide.)  
Status LEDs  
- The Power LED will  
light GREEN to indicate the amplifier  
is on and operating normally. The  
GREEN LED will turn off and the  
Protection LED will light RED when  
the amplifier has shut itself down  
due to speaker short circuit, DC  
offset, or overheating.  
Power Fuses -  
4.  
5.  
These fuse(s) protect  
the amplifier against internal elec-  
trical damage and are meant to  
protect the amplifier only. All other  
power connections should be fused  
at the source.  
(+) 12 Volt Power  
- Connect this  
terminal through a FUSE or CIRCUIT  
9
© 2002 Directed Electronics, Inc  
FIGURE 2—AMPLIFIER CONNECTIONS d600.1 REAR  
4
6
5
1
3
2
FIGURE 3—AMPLIFIER CONNECTIONS d1200.1 REAR  
4
6
5
1
3
2
10  
© 2002 Directed Electronics, Inc  
TOP PANEL CONTROLS  
11  
© 2002 Directed Electronics, Inc  
TOP PANEL FEATURES  
Control Panel Cover  
2. Apply two of the precut pieces of  
adhesive tape to the corners of the  
window that don't have tape. Make  
sure to apply the tape to the side  
that makes contact with the cover.  
Save the other two precut pieces of  
tape for future use.  
The amplifier’s gain and filter controls  
are mounted under the elliptical control  
panel cover. Magnets hold the cover  
snugly and allow easy access.  
To install the cover  
- Place the  
straight end of the control panel  
cover into the notched end of the  
amplifier’s top panel while  
elevating the curved end. Lower the  
curved end of the cover until the  
magnets make contact.  
3. Turn the illuminated window so the  
Viper snake logo will be in an  
upright position when the cover is  
re-attached to the amplifier. Press  
the window onto the underside of  
the control panel cover using the  
positioning pins for alignment.  
To remove the cover  
- Place a finger  
on the curved end of the cover  
while lifting up the straight end  
with your thumb. When the  
magnets lose contact, lift and  
remove the cover.  
Viper Badge Mounting  
The Viper Badge can be rotated in 90-  
degree increments to accommodate the  
amplifier’s final mounting position.  
Illuminated Window  
Alignment  
1. Determine the final mounting posi-  
tion of the amplifier.  
The illuminated window comes attached  
to the control panel cover with a light  
adhesive tape. An additional supply of  
precut adhesive tape is included in the  
hardware pack.  
2. Determine the position required for  
the badge to be viewed horizontally.  
3. Remove the protective cover for the  
adhesive tape on the under side of  
the badge.  
1. Firmly hold the control panel cover  
while gently pressing against the  
window from the top. If the  
window will not release easily, use  
a small flat tool to pry it loose. Pry  
slowly and evenly from several  
points to avoid deforming or  
cracking the window.  
4. Align the badge guideposts with the  
holes in the amplifier top panel.  
5. Press down firmly until the logo is  
securely attached to the amplifier.  
12  
© 2002 Directed Electronics, Inc  
SPEAKER WIRING DIAGRAMS  
Single subwoofer connection (bottom view)  
Two subwoofer connection (bottom view)  
NOTE:  
The dual + and -- subout terminals of the d600.1/d1200.1 are paralleled internally and the combined load impedance should  
be taken into consideration when connecting multiple subwoofers.  
13  
© 2002 Directed Electronics, Inc  
COMBINING AMPLIFIERS  
amplifiers in this combination. Multiple identical  
master/slave combinations can be added to any  
given system.  
The Viper d600.1/d1200.1 subwoofer  
amplifiers have the capability of  
connecting two or more amplifiers of the  
same power rating together in a  
master/slave combination for increased  
power with accurate level matching. They  
are the Parallel Synced Gain and External  
Synced Bridged combinations.  
External Synced Bridged  
In this master/slave combination the  
master amplifier pre-amp controls remain  
active and the slave amplifier pre-amp is  
bypassed. This allows the master amplifier  
to control gain, filter, and sub-level on both  
amplifiers. This combination allows the  
amplifiers to drive common subwoofer  
loads while being synced together via an  
out-of-phase audio pre-amp signal from the  
master amplifier. In this subwoofer wiring  
configuration the master amplifier sends the  
positive signal to the subwoofer while the  
slave amplifier sends the negative signal,  
making an externally bridged speaker  
connection. (Refer to External Synced  
Bridged section of this guide for amplifier  
and speaker connection diagrams.)  
WARNING: DO NOT attempt to combine amplifiers of different  
power ratings. These amplifier combinations work  
correctly only if the master and slave amplifiers are  
identical models.  
Parallel Synced Gain  
In this master/slave combination the  
master amplifier pre-amp controls remain  
active and the slave amplifier pre-amp is  
bypassed. This allows the master ampli-  
fier to control gain, filter, and sub-level  
on both amplifiers.  
This combination allows the amplifiers to  
drive their own separate subwoofer(s)  
while being synced together via an in-  
phase audio pre-amp signal from the  
master amplifier. Wiring connections to  
the amplifier subwoofer outputs in this  
combination should be standard in-phase  
configurations, creating a parallel  
speaker connection. (Refer to Parallel  
Synced Gain section of this guide for  
amplifier and speaker connection  
diagrams.)  
NOTE:  
Amplifiers in this combination can only be connected  
in matched pairs. Multiple matched pairs may be  
added to drive separate subwoofer loads in a given  
system.  
Combined Amplifiers Gain  
and Filter Settings  
Set the Subsonic, EQ, and other filter  
settings on the master amplifier to the  
positions that achieve the best sound  
quality. Adjustment guidelines are  
discussed in the Crossover and Gain  
Adjustment section of this guide.  
NOTE:  
One master amplifier can control up to three slave  
14  
© 2002 Directed Electronics, Inc  
PARALLEL SYNCED GAIN CONNECTIONS/SETTINGS  
Input Signal  
jacks as described in the Front Panel  
Connection section of this guide.  
Signal Connection  
- Connect an RCA  
1.  
2.  
- Connect these RCA 4.  
cable between the SYNC OUT RCA  
jack of the master amplifier and the  
SLAVE IN RCA jack of the slave  
amplifier as shown in the Figure 5.  
Slave/Master Switch  
Set the slave/master switch  
Subwoofer Speaker Connection  
5.  
- In  
on the master amplifier to the  
MASTER position.  
this amplifier combination each  
amplifiers must drive its own sepa-  
rate subwoofer(s). Connect the  
speaker terminals of each amplifier  
to any combination of one or more  
subwoofers that results in nominal  
impedance between one and four  
ohms. Make sure that each amplifier  
sees the same speaker impedance.  
Set the slave/master switch  
on the slave amplifier to the SLAVE  
position.  
Setting the slave/master  
switch on both amplifiers will auto-  
matically set the I/O RCA jack  
configuration according to each  
amplifier’s slave or master designa-  
tion.  
NOTE:  
One master amplifier can control up to three slave  
amplifiers in this combination. Multiple identical  
master/slave combinations can be added to any  
given system.  
Remote Sub Level Control  
3.  
- Connect  
the Remote Sub Level Control to the  
master amplifier only. The master  
amplifiers subwoofer gain is used to  
set the overall gain for all synced  
amplifiers, then the Remote Sub  
Level Control can adjust the gain of  
all synced amplifiers.  
15  
© 2002 Directed Electronics, Inc  
FIGURE 5—PARALLEL SYNC GAINED d600.1/d1200.1  
Master  
2
1
INPUT  
I/O  
SLAVE MASTER  
SLAVE IN  
SYNC OUT  
R
L
REMOTE  
BRIDGE OUT  
3
Do Not Use  
4
MIN  
MAX  
SUB LEVEL  
Slave  
INPUT  
I/O  
SLAVE MASTER  
SLAVE IN  
SYNC OUT  
R
L
REMOTE  
BRIDGE OUT  
Do Not Use  
Do Not Use  
2
Subwoofer Wiring (bottom view)  
5
NOTE:  
The dual + and -- subout terminals of  
the d600.1/d1200.1 are paralleled  
internally and the combined load imped-  
ance should be taken into consideration  
when connecting multiple subwoofers.  
16  
© 2002 Directed Electronics, Inc  
EXTERNAL SYNCED BRIDGED CONNECTIONS/SETTINGS  
Input Signal  
Signal Connection  
- Connect an RCA  
1.  
- Connect these RCA  
4.  
jacks as described in the Front  
Panel Connection section of this  
guide.  
cable between the BRIDGE OUT RCA  
jack of the master amplifier and the  
SLAVE IN RCA jack of the slave  
amplifier as shown in Figure 6.  
Slave/Master Switch  
2.  
Subwoofer Speaker Connection  
5.  
- In  
Set the slave/master switch  
this amplifier combination the  
Subwoofer speaker terminals of  
both amplifiers drive common  
subwoofer(s). Use the following  
speaker connection diagram when  
connecting the subwoofers to the  
amplifiers. Connect the amplifiers  
speaker terminals to any combina-  
tion of one or more subwoofers that  
results in a nominal impedance  
between 2 and 4 ohms. DO NOT  
connect loads of less than 2 ohms  
when connecting to amplifiers in  
the External Synced Bridged combi-  
nation.  
on the master amplifier to the  
MASTER position.  
Set the slave/master switch  
on the slave amplifier to the SLAVE  
position.  
Setting the slave/master  
switch on both amplifiers will auto-  
matically set the I/O RCA jack  
configuration according to each  
amplifier’s slave or master designa-  
tion.  
NOTE:  
Amplifiers in this combination can only be  
connected in matched pairs. Multiple matched  
pairs may be added to drive separate subwoofer  
loads in a given system.  
WARNING: Two wires of 12AWG minimum must be connected  
between the negative sub out terminals of the  
master and slave amplifiers.  
Remote Sub Level Control  
3.  
-
Connect the Remote Sub Level  
control to the master amplifier  
only. The master amplifier gain  
control is used to set the overall  
gain for both amplifiers, and  
then the Remote Sub Level  
control can adjust the gain of  
both amplifiers.  
17  
© 2002 Directed Electronics, Inc  
FIGURE 6—EXTERNAL SYNC BRIDGED d600.1/d1200.1  
Master  
2
1
Do Not Use  
INPUT  
I/O  
SLAVE MASTER  
SLAVE IN  
SYNC OUT  
R
L
REMOTE  
BRIDGE OUT  
3
4
MIN  
MAX  
SUB LEVEL  
Slave  
INPUT  
I/O  
SLAVE MASTER  
SLAVE IN  
SYNC OUT  
R
REMOTE  
L
BRIDGE OUT  
Do Not Use  
Do Not Use  
2
Subwoofer Wiring (bottom view)  
NOTE:  
The dual + and -- subout terminals of the  
d600.1/d1200.1 are paralleled inter-  
nally and the combined load impedance  
should be taken into consideration when  
connecting multiple subwoofers.  
5
The audio signal to the slave amplifier is  
180° out of phase. The subwoofer’s  
negative terminal must be connected to  
the slave amplifier’s positive terminal.  
18  
© 2002 Directed Electronics, Inc  
MULTIPLE AMPLIFIER COMBINATIONS  
The Viper d600.1/1200.1 subwoofer  
amplifiers can also be used in multiples  
of the master/slave combinations  
allowing for unlimited expansion to a  
systems subwoofer section. To use  
multiples of amplifier combinations the  
following directions must be adhered to  
for best results.  
more Directed Remote Sub Level  
cable splitters. Standard single-to-  
double phone line splitters and  
accessories from a local electronics  
store can also be used.  
For systems with more than two  
master/slave combinations, use  
multiple single-to-double splitters.  
Do not use phone splitters that  
divide the signal more than once  
per splitter or splitters designed for  
multiple uses.  
Audio signal  
- Divide the head unit  
or processor audio signal to the  
master amplifiers by using RCA Y  
adapters. Be sure to divide them an  
even number of times to ensure the  
input level at each master amplifier  
is matched.  
Amplifier configuration  
- Set up  
each master/slave amplifier combi-  
nation as described for the combi-  
nation type being used. (Refer to  
the Parallel Synced Gain or the  
External Synced Bridged section of  
this guide for amplifier and speaker  
connection descriptions.)  
Remote Sub Level Control  
- The  
Remote Sub Level Control cable can  
be divided several times to connect  
to each master amplifier. This can  
be accomplished by using one or  
19  
© 2002 Directed Electronics, Inc  
CROSSOVER SETTINGS AND GAIN ADJUSTMENT  
Your Viper Audio power amplifier needs to be adjusted carefully to achieve maximum  
performance. These are some guidelines to follow when fine-tuning the amplifier.  
Because this amplifier is only designed for subwoofer applications, the low-pass  
crossover is active at all times. The crossover point is adjustable to allow more  
precise system operation.  
Try and keep the setting low enough to prevent image smearing (you should not  
be able to hear male voices from the subwoofer) but not so low as to create a gap  
between the subwoofer and the mid-bass/midrange speakers. It will be to your  
advantage to spend some extra time with this adjustment, listening to familiar  
music or system set-up discs to achieve the kind of musical reproduction that you  
prefer.  
The gain adjustment allows you to set proper signal match for clean, quiet ampli-  
fier operation. Start by playing some music you are familiar with. With the gain  
adjustment on the amplifier in the middle of its rotation, bring up the volume on  
your head unit to the 3/4 volume setting or until you start to hear distortion or  
clipping. If you hear distortion before you reach the 3/4 volume setting of your  
head unit, reduce the gain setting on the amplifier and start to raise the head unit  
volume again. When you can listen to the music at or slightly above 3/4 on your  
head unit without audible distortion, slowly raise the gain of the amplifier until  
distortion is heard, then back off the gain until the distortion is not audible. This  
setting will allow you to reach full output with all but the quietest of source mate-  
rial, while avoiding excessive noise in the system.  
For systems using the Remote Sub Level Adjustment, increase the subwoofer gain  
on the amplifier by 25% and set the Remote Sub Level knob to the center position  
after making all system gain and filter adjustments. This will give the Remote Sub  
Level Control a wider range of adjustment to the subwoofer output.  
You should take into consideration the effect that gain adjustment has on system  
frequency response and staging. Again, plan on spending some time with music  
that you know getting the gain and crossover settings the way you like. Test discs  
and analyzers may help with this process, but in the end it's your ears that count  
--listen to the music!  
20  
© 2002 Directed Electronics, Inc  
SPECIFICATIONS d600.1/d1200.1  
Viper model d600.1 d1200.1  
275  
450  
RMS continuous power driven into 4 ohms from 20 to 250  
Hz @ 14.4 VDC at rated power/load.  
watts  
watts  
0.4% THD 0.5%  
RMS continuous power driven into 2 ohms from 20 to 250  
Hz @ 14.4 VDC at rated power/load.  
400  
800  
watts  
watts  
0.6% THD 0.7%  
600  
1200  
RMS continuous power driven into 1 ohm from 20 to 250  
Hz @ 14.4 VDC at rated power/load.  
watts  
watts  
0.8% THD 0.9%  
750  
1500  
Dynamic power rating (IHF-202 Standard) minimum load.  
watts  
watts  
RMS continuous power driven into 4 ohms from 20 to 250  
Hz @ 14.4 VDC in synced bridge mode (bridged pairs).  
800  
1600  
watts  
watts  
1200  
watts  
2400  
watts  
RMS continuous power driven into 2 ohms from 20 to 250  
Hz @ 14.4 VDC in synced bridge mode (bridged pairs).  
Signal-to-Noise Ratio  
Frequency Response  
Damping Factor  
Crossover  
Greater than 80 dB  
20-250 Hz +0, -1 dB  
50 (typical)  
Low-pass 24 dB/octave,  
variable from 30 to  
250 Hz  
Subsonic Filter  
Switchable 24 dB/  
octave, variable from  
20 to 250 Hz  
Bass Equalization  
Variable 0 to +12 dB,  
centered at 40Hz  
Input Impedance  
Input Sensitivity  
20K ohms  
Variable from 150 mV  
to 8 volt  
Output Impedance  
Supply Voltage  
1 to 4 ohms  
10 to 16 VDC  
Fusing and Power  
60A  
#8  
90A  
#4  
Minimum Cable Requirements (AWG)  
(Per amp, trunk mounted)  
21  
© 2002 Directed Electronics, Inc  
The company behind this system is Directed Electronics, Inc.  
Since its inception, Directed has had one purpose, to provide customers with the  
finest vehicle security, car stereo products, rear seat entertainment, and accessories  
available. The recipient of more than 20 patents in the field of advanced electronic  
technology, Directed is ISO 9001 registered.  
Directed Electronics, Inc.  
Vista, California 92083  
Directed® is committed to delivering world-class quality  
products and services that excite and delight our customers.  
Directed is a proud member of  
Quality Directed products are sold and serviced throughout North America and around the world  
Call 800 274 0200 for more information about our products and services  
© 2002 Directed Electronics, Inc. - All rights reserved - G46014/16 02/02B  

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