Linear Power DPSQ50 Programming manual

F O R T H E L O V E O F M U S I C
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DPSQ50©
SERIES 218©
4 CHANNEL AMPLIFIER
WITH ELECTRONIC VARIABLE CROSSOVER
OWNER'S MANUAL AND
INSTALLATION GUIDE
INTRODUCTION
You have purchased an amplifier that leads the way with sound quality, reliability
and features. This high performance amplifier delivers what you ask for; smooth
effortless listening and hard driving power to get you down the road. LINEAR
POWER™ has been a name recognized since 1975 as a product delivering high
quality and audio excellence. Now, you have the result of that experience.
Features include; Built-in adjustable crossover networks offering 12dB of slope,
switchable to high-pass, low-pass, band-pass, or full range. A line out has been
provided to allow for expansion of your system which also features an adjustable
crossover range of high-pass, low-pass, or full range. Gold plated 5 way speaker
binding posts allow for ease of connection. This amplifier features the DPS©
(Dynamic Power Supply) system famous on all of our Series 218©amplifiers. A
panel mount fuse holder makes changing the fuse a breeze. With all this, and
more, you Are sure to rest easy as you cruise the highways and byways. Enjoy
the Music!!
IMPORTANT NOTICE:
The DPSQ50©is NOT 2 ohm mono stable. While it may be used in 2 ohm
stereo, if you hook-up this amplifier in 2 ohm mono it will DAMAGE the unit and
VOID your warranty. For further information on this, or assistance to calculate
your total speaker load impedance, please call our Tech Hotline.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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DPSQ50©CONTROL PLATE
(1) STATUS LED'S
GREEN LED: This indicator tells you that the unit has power and is turned on
when lit. If this LED is on you know that you have correct polarity in your power
hook-ups.
YELLOW LED: This indicator tells you that the unit has shutdown due to
overheating. When the unit has cooled down to proper operating temperature this
LED will go out. You may then turn the unit back on. Make sure you're not
overdriving the unit and that it has plenty of airflow around it, to avoid the
overheating problem.
RED LED: This indicator tells you that the unit has shutdown due to excessive
current draw. This will occur if you have too low of speaker impedance, a shorted
speaker, or a shorted speaker wire. When you have corrected the problem
simply turn the unit off and then back on to clear this indicator.
(2) CHANNEL SET B CONTROLS
MODE SWITCH: This switch selects the crossover mode for Channel Set B left
and right channels.
FREQUENCY ADJUST CONTROL: This control is used to set the range of the
selected crossover mode frequency.
INPUT LEVEL CONTROL: This control is used to set the input sensitivity of
Channel Set B. Use this control to match the voltage output of your source unit to
the DPSQ50©inputs. In minimum position (fully counter-clockwise) the
DPSQ50©will except an input of 5 volts RMS. In maximum position (fully
clockwise) the DPSQ50©will except an input of 150 mVolts RMS.
RCA (phono) INPUT JACKS: This is where you connect your source unit to
Channel Set B.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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(3) CHANNEL SET A CONTROLS
MODE SWITCHES: These switches select the crossover mode for Channel Set
A left and right channels.
BANDPASS ADJUST CONTROLS: These controls are used to set the range of
the selected crossover mode frequency.
INPUT LEVEL CONTOL: This control is used to set the input sensitivity of
Channel Set A. This control is used exactly as described above in the Channel
Set B section.
RCA (phono) INPUT JACKS: This is where you connect your source unit to
Channel Set A.
DPSQ50©CONNECTOR PLATE
(1) LINE OUT AND CONTROL
RCA (phono) LINE OUT JACKS: These jacks allow you to connect this unit to
another amplifier. This output is a line level connection.
MODE SWITCH: This switch selects the crossover frequency of the line out RCA
jacks. The cutoff frequency of the line out is adjusted by the High-pass
Adjustment of Channel Set A. This adjustment works only in high-pass and low-
pass modes.
(2) SPEAKER OUTPUTS
OUTPUTS: These 5 way binding posts are for connecting to your speakers. Be
sure that if you connect this unit in bridged mono operation, that your impedance
is not lower than 4 ohms or else you will damage the unit and void your warranty.
(3) POWER BLOCK
POWER BLOCK: This terminal is where you connect your Power, Ground, and
remote turn-on wires to this unit.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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(4) FUSEHOLDER
FUSEHOLDER and FUSE: This unit comes with a 25 amp ATC style fuse. If you
must replace the fuse for any reason, be sure you use the same type and rating
of fuse.
MODE SWITCH LEGEND
CHANNEL SET A CHANNEL SET B
LINE OUT
SW1 SW2 FUNCTION SW3 FUNCTION SW4 FUNCTION
1 1 Band Pass 1 High Pass 1 High Pass
2 1 Low Pass 2 Low Pass 2 Low Pass
3 2 High Pass 3 Full Range 3 Full Range
3 3 Full Range
2 CHANNEL OPERATION
In addition to operating as a 4 channel amplifier, the DPSQ50©also has the
capability of operating as a true high power 2 channel unit. To accomplish this,
you need to open the amplifier case. Do this as follows:
1. Remove all connections from the unit (if it has already been installed).
2. Remove the 6 screws from the Control Plate face of the amplifier. (Two of
them hold the RCA jacks to the plate.)
3. Turn the unit over so that the bottom plate is facing up and the control plate is
facing you.
4. Remove the bottom plate by sliding it out toward you.
5. Now look for the little blue plastic jumpers. You will find them on the left, front
corner of the PC Board, just behind the Channel Set A RCA input jacks.
6. Place both jumpers so that they connect each of the wires.
7. Replace the bottom plate and control plate and install the DPSQ50 in your
vehicle.
By using the 2 Channel operation you won't have to buy extra splitters and have
a messy installation if your source unit only has one set of line level outputs. This
mode is also useful if you only plan to use the DPSQ50©just to drive your subs.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
4

HINTS ON INSTALLATION
- Always set the Mode switches before you adjust the frequency controls. The
frequency controls are used to further tailor the sound from your speakers.
- Make sure your signal cables are as far away as possible from any vehicle
electrical wiring, and as far away as possible from your speaker cables
- Make sure that all the components in your sound system are properly and
securely grounded. This will help reduce noise caused by "ground loops".
- Always make sure your amplifier(s) have plenty of air circulation to prevent
overheating. This will extend the life of the unit(s).
We hope you will completely enjoy your LINEAR POWER™ experience. Feel
free to call our Tech Hotline if you have trouble with the installation of your
DPSQ50©. Or if you just need some helpful hints. We're sure we'll be hearing
from you on the road!
GENERAL TROUBLESHOOTING
No Sound: Check that the green power LED is on. If the green power indicator is
lit, check all signal input and speaker connections. If the green power LED is not
lit, check for +12 Vdc on +12 V and REM inputs and check for a solid ground
connection on power connector. If yellow thermal LED or red current LED are lit,
see the status indicators portion of this manual.
Blows Fuses: Check all connections to be sure all power wires do not touch
ground or each other. Be sure power connections are not reversed. Check
internal transformer configuration for proper setting. Check input level control for
proper setting.
Noise Problems: Be sure the metal sleeve on the RCA (phono) jacks does not
touch the metal chassis of the vehicle, the heat sink of the amp, or the chassis of
any other components in your installation. Route signal cables away from power
wires, power connections, speaker wires, engine alternator, and vehicle firewall.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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SERVICE OR REPAIR
To obtain modification, service or repair, please contact our ONLY Authorized
LINEAR POWER™Product Service Center:
T.I.P.S. INC.
3455 Lanell lane, Pearl, MS 39208
[phone]
E-mail: [email protected]
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© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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SPECIFICATIONS
DPSQ50©
Rated Power 4 Ohm 50 x 4
RMS Power 4 Ohm 40 x 4
@ 12.5 V dc 125 x 2
RMS Power 4 Ohm 50 x 4
@ 14.4 V dc 165x 2
RMS Power w/ 60 x 4
Music (4 Ohm) 200 x 2
Channel Separation >80 dB
THD + Noise .008%
Slew Rate 8 volts/micro-second
Damping Factor (4-ohm/2-ohm) 200/100
Headroom @ 4 ohms stereo 3 dB
Signal-to-Noise 115dB
Frequency Response 5Hz-350kHz
Dimensions 2.8"x9.0"x11.0"
7.1x22.9x27.9cm
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc.
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