POWERCLASS™ PC1400 / PC1800 OWNER’S MANUAL CONTENTS (click on a topic to view) CONGRATULATIONS PC1800 ENDPLATE DIAGRAM PC1400 FEATURES / SPECIFICATIONS SPEAKER WIRING PC1800 FEATURES / SPECIFICATIONS INPUTS QBASS THERMAL MANAGEMENT QBASS PLUS CROSSOVER/SUBSONIC/GAIN INSTALLATION PC1800 FREQUENCY CHART WIRING PC1400 FREQUENCY CHART WIRING (continued) SYSTEM DIAGRAM ONE POWER / GROUND SYSTEM DIAGRAM TWO POWER, GROUND, and REMOTE TROUBLE SHOOTING PC1400 ENDPLATE DIAGRAM WARRANTY
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FEATURES / SPECIFICATIONS 1400 Adaptive MOSFET Switching Power Supply Fully Complementary Triple Darlington Output Stage 2 Way Variable Crossover with Line Outputs AP-III Protection Circuitry QBASS Bass Boost Balanced Differential Input Stage High Voltage Input Capability with Input Attenuation Switch Gold Plated RCA Input and Output Connectors PowerLock Speaker and Power Wire Connectors Three Year Warranty when installed by an Authorized PrecisionPower Dealer Completely Designed And Handcrafted In The USA
FEATURES / SPECIFICATIONS 1800 Adaptive MOSFET Switching Power Supply Fully Complementary Triple Darlington Output Stage AM IV Protection Circuitry QBASS PLUS™ Bass Boost QBASS REMOTE™ Compatible Advanced Buss Technology Forced Air Thermal Management Detented, Variable 24dB/Octave Low Pass Crossover Detented, Variable 24dB/Octave Subsonic Filter Balanced Differential Input Stage High Voltage Input Capability with Input Attenuation Switch Gold Plated RCA Input Connectors PowerLock Speaker and Power Wire Conn
QBASS ™ Q BASS ™ On the PC1400 amplifier, we offer tremendous control of your bass with QBASS™. On the front end panel of your PC1400 you will find the QBASS™ level control. Adjust the level control clockwise for up to 12dB of boost at a factory preset frequency of 40Hz. QBASS ™ +12dB +6dB 0 20Hz 40Hz 60Hz 80Hz 100Hz CAUTION: QBASS™ should only be used in systems with strong subwoofers. 12dB is a lot of bass boost and could damage full range speakers.
QBASS PLUS ™ Q BASS PLUS ™ On the PC1800 amplifier, we've taken bass control to a higher level with QBASS PLUS™. The two QBASS switches (labeled 1 and 2) on the front end of the amplifier allow you to select one of four frequency centers 30Hz, 36Hz, 44 Hz and 60 Hz. The Q SELECT switch determines the width of boosted frequencies. A 'Q' of 2 (switch out) will give you a wide boost while a 'Q' of 4 will boost a narrow range of frequencies. (See chart below.
INSTALLATION Tools/Parts needed for Installation (not supplied) Small flat blade screwdriver Phillips Screwdriver (#2 or medium sized) Wire cutters Wire strippers 4 - #6 round head screws, and 1 - #8 sheet metal screw (or nut, bolt, and star washer) 2 - Ring connectors (large enough to accommodate your method of grounding) In-line fuse or circuit breaker - see fuse chart below Power and ground wire - see Power Wire Calculator on page 4 Speaker wire - 16 gauge or larger Grommets (sized to work with the power
WIRING The following is a basic formula to be used as a guide to determine current draw. A 50% amplifier efficiency rating is used as an average. Your new POWERCLASS™ amplifier is more efficient, other amplifiers will probably be less. This formula is to be used as a guideline. Using wire of a larger gauge can only improve the current transfer of your system. Do not use smaller gauge wire.
WIRING Before beginning, disconnect the negative (-) terminal of the battery prior to working on the positive (+) terminal to prevent a short to ground. This is important, unless you want to spend the rest of your life with a nickname like "Sparky," or "Smokey." Reconnect the negative terminal only after all connections have been made. Factory Ground wire may need to be replaced if it is frayed or broken.
POWER / GROUND Grounding Locate an area near the amplifier(s) that is metal and clean an area about the size of a quarter to bare metal. Inspect the area around and underneath to be sure you won't drill into wires, brake or fuel lines, etc. Drill a pilot hole in the middle of this area. Terminate the ground wire with a ring connector and attach it to the bare metal using a #8 sheet metal screw and washer or preferably, a bolt, nut and a star washer (not supplied).
POWER / GROUND and REMOTE Once you have run both the power and ground wires, it's time to connect the cables to the amplifier. Cut off excess wire and, using wire strippers, strip the ends of the power and ground cables approximately 1/4 inch. Locate the PowerLock power and ground connector (supplied). With a small flat bladed screw driver, loosen the screws before attempting to insert the cables. Insert the wires into the appropriate hole, and tighten the screws.
ENDPLATE DIAGRAM 1400 1. INPUTS Plug in the RCA leads from your head unit or crossover here (see page 13). 2. GAIN Use this control to match the output level of the head unit to the amplifier (see page 15). 3. -12dB For use with high level inputs (4V up to 12V). Push this switch in to attenuate the input by 12dB (see page 13). 4. XOVER FREQ. Detented control adjusts HP/LP crossover frequency from 20Hz to 5kHz (see pages 15 & 17). 5.
ENDPLATE DIAGRAM 1800 1. INPUTS Plug in the RCA leads from your head unit or crossover here (see page 13). 2. GAIN Use this control to match the output level of the head unit to the amplifier (see page 15). 3. SUBSONIC FREQ. This is used to control the detented subsonic filter from 5Hz to 50Hz (see pages 15 & 16 ). 4. LOWPASS FREQ. Detented control adjusts LP crossover frequency from 50Hz to 300Hz (see pages 15 & 16 ). 5. SUBSONIC ON/OFF Push this switch in to activate the subsonic filter (see page 15 ). 6.
SPEAKER WIRING Using 14 gauge or larger, run the speaker wires from the amplifier location through the vehicle to the speakers. Observe the same precautions for routing these wires that you followed for running the power and remote turn-on wires. Locate the speaker/remote turn-on PowerLock connector.
INPUTS There is a pair of RCA inputs on the front end of your amplifier. The RCA cables from your head unit or crossover plug in here. If your head unit doesn't have RCA outputs don't worry. Simply add a set of RCA plugs (available at your dealer) to your front or rear set of speaker leads (see drawing below), plug them into the input jacks, and push in the -12dB input attenuation switch.
THERMAL MANAGEMENT Heatsink Cooling The unique heatsink on your POWERCLASS™ amplifier has been designed with fins on the inside of the aluminum mass. This allows for the transfer of heat from the circuitry to the heatsink fins and out through the vents in the endplates. Be sure you have ample space around the amplifier for cooling, at least 2" on all sides.
CROSSOVER, SUBSONIC and GAIN Crossover PC-1400 Your new Monoblock amplifier has a variable 20-5kHz 12dB/Octave HP/ LP crossover. When you select the LP feature on this amplifier you have made the output RCA's HP, and vice versa when you select HP for the speaker output. PC-1800 The PC-1400 has a variable fourth-order Linkwitz-Riley type, 24dB per octave LP crossover built in to provide system flexibility without the added expense and installation of an outboard crossover.
FREQUENCY CHART PC1800 All crossover frequency controls are detented for improved performance. Each "click" counted from the full counterclockwise position corresponds to a specific frequency. Refer to this chart and page 12 for set-up instructions. DETENT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 SUBSONIC LOW PASS 4.86 Hz 4.86 Hz 4.86 Hz 4.93 Hz 5.08 Hz 5.30 Hz 5.58 Hz 5.88 Hz 6.20 Hz 6.66 Hz 7.07 Hz 7.67 Hz 8.32 Hz 9.15 Hz 10.
FREQUENCY CHART PC1400 The crossover frequency control is detented for improved performance. Each "click" counted from the full counterclockwise position corresponds to a specific frequency. Refer to this chart and page 15 for set-up instructions. DETENT XOVER FREQ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 20 Hz 21 Hz 21 Hz 21.5 Hz 22Hz 23 Hz 24.5 Hz 26 Hz 27.
SYSTEM DIAGRAM ONE Source Unit eject BASS 1 2 5 6 3 4 7 8 Trk 1 TREBLE BALANCE VOLUME PPI TRACK RIGHT LEFT FOWARD R PAR-245 Preamp/Equalizer MAR KET ING DPT REVERSE Input L R OutpRear ut L t pu In ty vi ti nsi Se Front Outp ut L R Precis PAR- ionPowe 245 r Vol ume Powe r In-Cl 3 4 Sub 1 2 Frequenc y Adju st Low-M id High-Mid R ip + Fade r ct at Power Treble Made in USA + Defe LED Sele Low F + Sub + Low + Low -Mid High -Mid Treb le Tweeter PA
SYSTEM DIAGRAM TWO Source Unit eject BASS 1 2 5 6 3 4 7 8 Trk 1 TREBLE BALANCE VOLUME FOWARD MAR PPI TRACK RIGHT LEFT KET ING DPT REVERSE Input L R R OutpRear ut L t pu In ty vi ti nsi Se Front Outp ut L R Precis PAR245ionPower Vol ume Powe r 1 2 3 4 Sub id High-Mid R ip + Fade r Power at Treble Made in USA + Defe ct Low-M F In-Cl LED Sele Frequenc y Adju st Low + Sub + Low Low + -Mid High -Mid Treb PAR- 245 14K Hz -23.
TROUBLE SHOOTING NO SOUND Is the LED lit? NO Check Power and Remote turn-on wire for voltage. Make sure Ground wire is secure. YES PC 1800 ONLY WHAT COLOR ? RED Central Muting is engaged. Remote turn-on wire must have more than 8 volts to release central muting. Check Remote turn-on at the head unit. You may need to install a relay if the head unit doesn't put out sufficient voltage. GREEN Substitute RCA inputs with another source, and connect a known good speaker to the output.
WA R R A N T Y Three-Year Limited U.S.A. Warranty This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. PrecisionPower warrants its products to be free from defects in materials and workmanship under normal use and service for a period of three (3) years from the date of original purchase when the unit is installed by an Authorized Dealer.