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MODEL  LP2075

©

LP Series TO-3P

INSTALLATION AND

OPERATION MANUAL

INTRODUCTION

Congratulations

. With so much lower-quality car audio equipment currently on the market, you

have found one of the highest-grade,

All American

-made amplifiers produced today. Since

1975

we have manufactured the very best audio equipment for your car. Yes, we are

American

owned, designed, engineered and built in the USA,

and we are proud of it! All

LP Series©

amplifiers, also have a

4-year warranty**

 to assure your investment in a

LINEAR POWER™

product was a wise choice. Our products are simple, yet flexible, and we are concerned about
giving you the absolute best sound quality and reliability possible. As you would expect, you will,
in the near future, see other new ideas and innovative products ranging from more amplifiers,
crossovers and preamps, from one of the industry’s oldest and most-respected amplifier
companies.

TECHNICAL DISCRIPTION

POWER SUPPLY:

 Our mosfet-driven converter utilizes some of the highest current fets on the

market today as switching transistors. These transistors are protected by a unique non-interactive
over-current protection that does not regulate the power supply until maximum current is
achieved, unlike other manufacturers’ designs that fully regulate the power supply and, thus, limit
headroom and dynamic response. The power supply is extremely over built, with the transformer
capable of delivering more than 5 times the energy needed to run the output stage at rated
power. The power supply is also highly efficient, with the efficiency levels above 90 percent.

OUTPUT STAGES:

 Transformer-less, direct coupled and fully complimentary, output transistors

are high current and low distortion and are the highest-sound-quality devices currently offered
from

On Semiconductor

 (Motorola). These

TO-3P

 devices are operating at a fraction of their

limitations and utilize the same style internal electronics as our old amps did, using the

TO-3

Metal

-cased transistors but just with a newer and better SQ part number. In

4-ohm stereo

, the

output devices in the

LP2075©

 work at approximately

15%

of their design capabilities as

engineered by Motorola. Power is supplied to the outputs thru heavy-gauge, solid copper buss
bars, and the power is triple filtered at three separate locations to ensure the lowest noise and
distortion from the amplifier as well as the highest slew rate and transient response by having the
last filter and storage stage directly at the bank of output devices.

Linear Power™

 products are

designed for serious sound quality, extremely over built and made to last!

**4-year warranty on all amplifiers that are dealer purchased and dealer installed; 1-year

warranty on all over-the-counter and Internet sales.

 

Summary of Contents for LP Series TO-3P

Page 1: ...t fully regulate the power supply and thus limit headroom and dynamic response The power supply is extremely over built with the transformer capable of delivering more than 5 times the energy needed to run the output stage at rated power The power supply is also highly efficient with the efficiency levels above 90 percent OUTPUT STAGES Transformer less direct coupled and fully complimentary output...

Page 2: ...stem You can use the 12 volts provided in the connector or use your on 12 volt source and use the ground in the fan connector to switch ground to your fan system The fan circuit is also reverse polarity protected so daisy chaining multiple amps into one custom fan system is possible with any one of the amps being able to trigger the fan system when needed without damaging the other amplifier fan c...

Page 3: ...ommets Installing the amplifier on an amp board or in an amp rack to further isolate it from the vehicle is recommended WIRING 1 Disconnect the negative ground cable from your vehicle s battery before making any power connections and or pull MAIN power fuse at battery for audio system DO NOT reconnect main system power fuse and or ground cable until installation is complete 2 DO NOT connect RCA in...

Page 4: ... for additional noises to enter the audio path Removing or installing the RCA cables while the amp is on and functioning disconnects all ground to the pre amp and output stages also running the amplifier with no RCA cables connected can cause the amplifier to pick up RF radio frequency noise due to the wide bandwidth of the amplifier This can cause a hiss noise thru the speakers and or cause the a...

Page 5: ...ight side of the input sensitivity gain control are two sets of push pin connectors one set of 3 pins for left channel and one set of 3 pins for right channel To set the amplifier for Differential Input mode remove the shorting connector from across the two pins marked SE and move them across the two pins marked DIFF BAL In the case of noise experimenting with changing the two input modes may help...

Page 6: ...e is no external crossover capability such as in factory OEM head units The crossover option can be ordered with the amp as a production option or the amplifier returned after original purchase to be added to the circuit at a later date This is a high quality crossover using high grade parts including sound quality op amps and processors The crossover uses two infinitely variable crossover potenti...

Page 7: ...armful to your hearing 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 specifically designed for noise reduction In accordance with the OSHA Occupational Safety and Health Act reg...

Page 8: ...sten for a change in the noise level If little or no change occurs the amplifier s input power source battery alternator is contaminated or you have bad chassis ground connections to amplifier If the noise is gone the possibilities are a ground loop between the radio and some other piece of equipment inline or between the amplifier s no RCA ground getting to amp or a noise problem earlier in the s...

Page 9: ...ir please go to www linearpower com There you will find a service page that you can download and print a RA Form from This form will have all the information you need to send the unit in for repair and areas for you to enter all your information If you are sending a product in for warranty you must also send proof of purchase from an authorized dealer of direct purchase receipt from the factory Yo...

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