Linear Power 8002SW User manual

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F O R T H E L O V E O F M U S I C
MODEL 8002SW©
(1996 MSRP $1549.00)
INSTALLATION AND
OPERATION MANUAL
INTRODUCTION
Congratulations, with all the auto sound equipment available on the market
today, decisions are not always easy. At LINEAR POWER™, we offer what no
other company can: Since 1975 we have manufactured the best audio equipment
for your car. Also, a 2-year warranty is given to assure your investment in a
LINEAR POWER™ product was a wise choice. As expected, you will also see
new ideas and products ranging from amplifiers to crossovers to preamps.
TECHNICAL DISCRIPTION
POWER SUPPLY: Our unique mosfet driven converter utilizing bipolar switching
transistors offers greater reliability and efficiency. The regulation of the supply
provides only the required amount of output current under all operating
conditions. This new technology uses our proprietary FMB© (fixed modulation
block) circuitry which marries mosfets with high power TO-3 bipolar switching
devices to bring you the best of both worlds. It gives the renowned reliability of
the massive TO-3 bipolar transistor and the increased efficiency of the mosfet
transistor. The brains behind the power supply is the FMB©housed in the black
box at the end of the amp, this controls two reference mosfet transistors which
drive the bipolar TO-3 switching devices along each side of the amp, providing
large and fast amounts of power to run the amplifier.
Output Stages: Transformer less, direct coupled and fully complimentary.
Output transistors are high current and low distortion TO-3 devices, operating at
a fraction of their limitations. In 8-ohm mono, the output devices in the 8002SW©
work 50% of their design capabilities as engineered by Motorola. Linear
Power™ products are seriously over built!
PROTECTION: Since the 8002SW©is capable of enormous amounts of output
power, it is protected from short circuit and undersized load conditions. It is also
protected against high ambient temperatures by thermal protection.
CONSTRUCTION: Features: Our unique, variable input sensitivity control
permits optimal signal matching for lowest noise and lowest distortion with
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 1

virtually any source. We use only high quality low ESR (Effective Series
Resistance) filter capacitors for lower power supply loses. All components used
are rated for at least 150% of their intended use.
QUALITY CONTROL: In-house construction of critical components like
transformer and chassis, as well as total assembly, allows LINEAR POWER™ to
maintain uniform quality. 100% of the finished units are tested, then burned in for
four hours, and tested again. Amplifiers, which pass this rigorous test, have truly
earned the LINEAR POWER™ logo.
MOUNTING
1. The amplifier will work best if it is kept as cool as possible. Mount in a position
that would allow the circulation of air into the intake side of the fan and allow the
exhaust side to blow freely into the trunk or open area.
2. Wire all connections as shown in instructions. Connect fan power plug to the
amp. Place fan shroud into position over amplifier and mount securely. Be sure
fan shroud does not touch the case of the amplifier as this might cause unwanted
noise due to vibrations.
WIRING
1. Disconnect the negative ground cable from your vehicle's battery before
making any power connections.
2. Connect the negative power wire from the amp to a solid frame member via
bolt or self-tapping screw. This connection must be to a clean, unpainted surface.
Always attach the ground wire first when installing this amplifier, and disconnect
the ground last when removing this amp from the system.
3. A fuse of the proper size must be installed in line with the power wire to protect
the vehicle's electrical system. It should be connected to the battery's positive
terminal. Use the fuse and fuse holder provided and replace only with the proper
type and size.
WARNING: USE OF OVERSIZE FUSE WILL VOID THE WARRANTY
4. The other end of the fuse holder should be connected to the positive power
lead of the amp. To extend the length of the wire, use only the same size or
larger wire.
5. The red and white wire acts as a remote turn-on for the amp. It should be
connected to a switched lead such as the power antenna lead from the radio. If
multiple amps are to be used in the system a relay should be added to the
system to assure proper current needed to turn on several amps.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 2

6. The RCA jacks will accommodate either high or low level signals, ranging from
150mV to 5 volts. For low-level signals, always use shielded cables and avoid
routing cables in the vanity of any power wires. The center pin of the RCA plug is
always positive.
NOTE: THE INPUT SIGNAL TO THE AMPLIER MUST BE EITHER A STEREO
SIGNAL OR A SUMMED MONO SIGNAL. THE USE OF AN INVERTED MONO
SIGNAL WILL RESULT IN THE LOSS OF OUTPUT.
FOUR-OHM CAPABILITY
As shipped from the factory, the 8002SW©will be set up to run an 8-ohm mono
load. To correctly run a 4-ohm mono load, remove the cover and change the
power supply taps to the 4-ohm taps located on the board next to the 8-ohm
taps. There are NO power increases for running the lower 4-ohm load; this is
done for convenience if you already have a 4-ohm speaker arrangement. There
are efficiency losses and higher current consumption to run the amp into a 4-ohm
load. Not selecting the proper 4-ohm power supply taps before running the
amplifier into a 4-ohm load WILL DAMAGE the amplifier and void all warranty.
RUMBLE FILTER
As shipped from the factory the adjustable rumble filter is set in the off position.
This allows the amplifier to play as low as 10Hz designed for systems, which
utilize sealed enclosures. Moving this switch to the” ON" position will set the low
frequency cut off to 36 Hz for systems utilizing ported enclosures.
SPEAKER OUTPUT
The speaker output connector on the 8002SW©is also the point at which the
sense wires will attach to the amplifier. Attach a lead from the positive terminal of
the speaker to the speaker positive terminal on the speaker output connector of
the amplifier. Attach a lead from the positive sense wire terminal to the same
point on the speaker at which the positive speaker lead is attached. Repeat these
steps for the negative leads. The speaker terminal, with the terminal facing you,
fins up, from left to right, is as follows:
SENSE (+); SPEAKER (+); SPEAKER (-); SENSE (-)
See the drawing of the speaker terminal on next page for the proper wiring
diagram of the speaker to amplifier.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 3

NOTE: IN ADDITION TO THE IMPEDANCE REQUIREMENTS THAT MUST BE
MET FOR SPEAKERS USED WITH THIS AMPLIFIER, THE COMBINED
CONTINUOUS POWER HANDLING CAPABILITY OF THE SPEAKER (S) USED
IS RECOMMENDED TO BE AT LEAST 1000 WATTS FOR SAFE OPERATION.
GAIN ADJUSTMENT
In a basic system, using a single amplifier, set the amp to minimum, turn the
deck up until it just starts to distort, then back the deck down slightly. This is the
point where the output of the deck is cleanest. Now, bring the gain of the amp up
until it just starts to distort, and back it down slightly. This will allow the deck and
amp to reach maximum useable output at the same time.
WARNING
Your new LINEAR POWER™ amplifier, when used in conjunction with many of
the efficient speaker systems on the market today, can produce sound pressure
levels that are considered harmful to your hearing.
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 4

Exposure to loud music may lead to loss in hearing. This effect may not be
readily appreciated because the damage to hearing is progressive.
Those who are exposed to excessive sound pressure should utilize direct
individual protection in the form of earplugs or earmuffs, which are specifically
designed for noise reduction.
In accordance with the OSHA (Occupational Safety and Health Act) regulations
for noise levels as they relate to the work area, excessive sound pressure is
defined as 115 db (a) continuous for any length of time.
We recommend that you exercise restraint while enjoying the performance of this
and other high-powered mobile audio equipment.
GENERAL TROUBLESHOOTING
NO SOUND: Check all connections. Check main power fuse. Check assessor
fuse. With a trouble light or meter, be sure +12V is present at the amplifier on the
large positive cable and on the small red/white turn-on wire. Check for a good
ground connection. Check by substitution or other method for proper operation of
music source.
BLOWS FUSES: Check all connections to be sure all power wires and speaker
wires do not touch ground or each other. Re-check polarity of main power wires.
SHUTS OFF: As this amplifier is equipped with a thermal and a short circuit
shutdown system, in the unlikely event of excessive temperatures due to high
ambient temperature or improper speaker impedance, the amp will turn itself off.
To avoid damage to the speakers, turn the volume to a minimum while waiting for
the amp to turn itself back on.
BUILT IN NOISE SUPPRESSION
The vehicle's battery forms a huge capacitor bank that does a fantastic job of
filtering noise. Unfortunately, batteries grow old and lose their ability to hold a
charge. At the same time, they lose their ability to filter noise; even corrosion on
the battery terminals will cause increased noise as it isolates the battery.
If the vehicle is in need of ignition repair or tune up, increased noise will result.
Specifically, check the condition of points and condenser, as well as the spark
plug leads. Don't forget to check for resistor plugs, too.
TROUBLESHOOTING NOISE
Once the type of noise has been determined, the entry method must be isolated.
The easiest place to start is the amplifier. Unplug the RCA jacks and listen for a
© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 5

change in the noise level. If little or no change occurs, the amplifier's power is
contaminated. If the noise is gone, the possibilities are a ground loop or a noise
problem earlier in the system. If the problem is a ground loop, the best solution is
a better ground for the amp(s). Another solution is to carefully connect a wire
from the shield of the RCA connector, at the amplifier end, to a good ground on
the vehicle. This will effectively short circuit the ground loop.
The next check is for radiated noise. With the deck still electrically connected to
the vehicle, slowly remove it from its installation, and listen for a change in noise
level. Any reduction would indicate that noise was being radiated directly into the
deck while it was in the dash. If you are dealing with radiated noise, the only
solution is isolation. The easiest method is usually to move the contaminated
wiring away from the stereo's wiring.
The best way to eliminate power line noise is to install a filter capacitor across
the noise source. The best capacitors to use are .5mfd 25v bypass capacitors for
the coil, as well as any accessory motors, and .1mfd 100v ceramic disc
capacitors for switches. Another way to suppress power line noise is with noise
filters.
SERVICE OR REPAIR
To obtain service or repair, please contact our 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. 6

SPECIFICATIONS
8002SW©
Min. RMS Continuous (8 Ohms mono) @ 12 Volts 800 WATTS x 1
THD 20Hz-20KHz 0.08%
RISE TIME 16 V / microsecond
DAMPING FACTOR
8 OHMS 220
4 OHMS 110
HEADROOM 3 dB
SIGNAL TO NOISE RATIO (max/min gain) 75dB / 85dB
FUSE RATING 60 Amp
CURRENT DRAW (amps)
8 OHMS 90
4 OHMS 120
Idle 1
DIMENSIONS H x W x L 3.5"x9.5"x17.5"
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© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™is a trademark of Linear Power, Inc. 7