AMPLIFIER MODELS A600/4 A1200/4
TABLE OF CONTENTS Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 CEA Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CONGRATULATIONS Thank you for choosing Precision PowerTM audio equipment. Designed and engineered in the USA, this product combines innovative technology with the finest materials to consistently deliver Absolutely State of the Art™ performance, sound quality, reliability, and value. This Precision PowerTM product reflects our commitment to offer you unparalleled performance and quality for years of dependable service and listening enjoyment.
FEATURES Advanced Instrumentation Input Stage TC-X Crossover 24dB/Octave; HP/LP/FULL; 30-4kHz Crossover Adaptive PWM Power Supply AP-IV Protection Circuity Fully Complementary Darlington Output Stage QBASSTM Bass Boost (A600/4) QBASS PlusTM Bass Boost (A1200/4) High Voltage Input Capability with -12dB Attenuation Switch Gold Plated RCA Input and Output Connectors PowerLockTM Speaker and Power Wire Connectors Mixed Mono/Stereo Operation WHAT’S INCLUDED Amplifier (with speaker and power plugs mounted) (4) Mou
SPECIFICATIONS Nominal Power Ratings MODEL A600/4 A1200/4 4ohm STEREO 4 X 50 4 X 100 2ohm STEREO 4 X 75 4 X 150 4ohm MONO 2 X 150 2 X 300 General Specifications Frequency Response Power Bandwidth Total Harmonic Distortion + N Input Topology Input Sensitivity 20Hz - 20kHz 10Hz - 50 kHz <0.
FUSE REQUIREMENTS You will need to install an in-line fuse or circuit breaker in the power wire within 18” of the battery. This fuse or circuit breaker is to protect your vehicle from fire in case the power wire shorts to the vehicle body. If you are only using one amplifier, use the fuse rating indicated in this chart. If you are using more than one amplifier, add up the fuse ratings for all the amplifiers. This sum is the rating for your fuse or circuit breaker.
AMPLIFIER STATUS LEDS 1 2 The LEDs provide the following indications: 1. Power - These LEDs illuminates the center Precision Power logo background when the amplifier power is turned on. 2. Short - These LEDs behind the PPI logo will flash to indicate a short on the output. 2. Thermal - These LEDs behind the PPI logo will extinguish if the amplifier is in thermal shutdown protection. Note: Read the AP-IV Protection Circuit section for additional information regarding Short and Thermal protection.
TOOLS/PARTS FOR INSTALLATION NOTE: TOOLS ARE 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.
WIRING Before beginning, disconnect the negative (-) terminal of the battery prior to connecting the amplifier to the positive (+) 12V terminal to prevent a short to ground and potential damage to wiring and equipment. Some vehicle radios have an anti-theft feature where when the radio is removed from 12V the radio will no longer function and must be code reset. Note: The cables running from the battery to the rear of the car should be installed on the side of the car opposite to the antenna.
Observe the same precautions for routing these wires that you followed for running the power and remote turn on wires. Cut off excess and, using wire strippers, strip 1/4-inch of insulation. Locate the front speaker/remote turn-on PowerLockTM connector. Using a hex wrench loosen the screws on the upperside of the connector. Insert the front speaker leads into the end and secure with the hex wrench. Check to be sure you've maintained proper polarity before securing each wire.
Rear Speaker POWERLOCKTM Connector 2mm hex wrench Left Speaker Left Speaker + Right Speaker + Right Speaker - Remove retaining screw with a 2.5mm hex wrench For the rear channels, locate the four terminal speaker PowerLockTM connector. Using a hex wrench loosen the screws on the upperside of the connector. Insert the speaker leads into the end and secure with the hex wrench. Check to be sure you've maintained proper polarity before securing each wire.
CHARGING SYSTEM If your total current draw is over 100 amps (or total output power is over 600 watts), you are probably exceeding the capability of your charging system. Dimming lights and fluctuating voltage are solid indicators that you need to upgrade your alternator, battery, or both. You should also check the condition and current capacity of the stock battery negative cable and connections, and replace or upgrade as necessary.
load, double its 4 ohm RMS rating. These amplifiers will effectively double their power at this load. 1000W X 1.5 X2 = 3000 watts 3000W = 250 Amps total current draw 12V If you are using more than one amplifier, add up the total current draw for all of them and choose the appropriate gauge based on the grand total. POWER WIRE SIZE A minimum of 8 gauge or a maximum of 4 gauge wire is recommended dependent on the application. The ground wire must be the same gauge as the power wire.
POWER LOCK CONNECTORS Once you have run both the power and ground wires, then 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 PowerLockTM power and ground connector (supplied). Using a hex wrench, loosen the screws before attempting to insert the cable wires. Insert the wires into the appropriate hole, and tighten the screws.
suitable subwoofer or center channel. Deriving the mono channel is accomplished by using the Left Channel Positive wire (L+) as the positive speaker wire and the Right Channel Negative wire (R-) as the negative speaker wire. Note: It is important that a minimum 4 ohm impedance is observed. If the impedance drops below 4 ohms while the amplifier is wired in the bridged configuration, the amplifier’s protection circuitry may engage.
A600/4 FRONT PLATE DIAGRAM 20 19 18 17 FREQ FULL SUM REAR LP LP HP 30 4K OUTPUTS FULL 16 15 14 FREQ GAIN LP HP 12 INT EXT LP 30 HP FULL 13 4K MIN MAX REAR SOURCE 1 RR+ 2 RL+ RL- FR- FR+ REM BRIDGED 3 FL+ OUTPUT REAR FRONT LP HP FULL SOURCE 0 BRIDGED R 10 30 FULL QBASS RR- 11 +12dB FL- 4 ATT -12dB 5 4K HP FREQ GAIN L MIN MAX OUT IN IN FRONT 6 7 8 9 1.
12. Rear Input INT/EXT Switch: Select the INT position if you want to use the internal signal path from the front crossover for the rear input, or the EXT position to use the external rear RCA input. 13. Source HP/LP/FULL Switch: Select the desired setting. HP/LP/FULL for the internal signal from the front channel to the rear channel when not using an external rear RCA input. 14. Rear Gain: Use this control to match the output level of the head unit to the rear channel of the amplifier. 15. Rear Freq.
A600/4 END PLATE DIAGRAM 1 2 1. Power/Ground PowerLockTM: After you have securely connected your power and ground wires, plug in the Power/Ground PowerLockTM connector here. 2. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums for proper amplifier cooling.
4 & 5. QBASSTM 1 and QBASSTM 2 Freq.: Use these switches, QBASSTM 1 and QBASSTM 2 to program the QBASS PLUSTM circuit frequency. 6. -12dB Attenuation Switch: Push this switch ‘IN’ for high voltage input (4V-12V) capability. This button must be pushed ‘IN’ for use with speaker level input on common ground head-units or for high voltage line drivers. 7. RCA Output: RCA outputs provide HP/LP/FULL 30-4kHz signal to another amplifier. 8. Rear Inputs: Plug in the rear RCA leads from your source here. 9.
19. Output Source HP/LP/FULL Switch: Select the desired crossover setting, HP/LP/FULL for the RCA output signal. 20. Output Crossover Freq. Control: Use this control to adjust the output crossover frequency from 30Hz to4kHz. 21. Output Crossover HP/LP/FULL Switch: Select the desired crossover setting, HP/LP/FULL for the internal output signal of the RCA output. Note: See the next section for the rear panel view of this endplate. A1200/4 END PLATE DIAGRAM 1 2 3 +18 QBASS REMOTE 4 0 QBASS 1.
INPUTS There are two sets of RCA jacks on the front end of your amplifier. The RCA cables from your source unit go in the set labeled INPUTS. If your source unit doesn’t have RCA outputs, then 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.
A600/4, A1200/4 BLOCK DIAGRAM INPUT ATTENUATION INPUT ATTENUATION 21
ADVANCED INSTRUMENTATION INPUT The Advanced Instrumentation Input has been incorporated from the legendary Precision PowerTM 2500F1. This circuit completely isolates the chassis ground from the audio circuit of the amplifier and reduces noise radiated into your signal cables by up to 40dB. This is equivalent to a noise reduction of approximately one hundred times what the noise level would be without this circuitry.
QBASS/QBASS PLUS SPECIFICATIONS QBASSTM (A600/4) Up to 18dB of boost centered at 40Hz, with a Q-factor of 2. QBASS PLUSTM (A1200/4) Up to 18dB of boost with selectable center frequency at 30Hz, 36Hz, 44Hz or 60Hz, with a Q-factor of 2. Optional QBASS REMOTETM (A1200/4) This boost control can be mounted in the dash and will supersede the boost control on the amplifier endplate. QBASS PLUS On the A1200/4 amplifier, we’ve taken bass control to a higher level with QBASS PLUSTM.
QBASSTM Settings 1 2 Freq. IN IN 30Hz IN OUT 36Hz OUT IN 44Hz OUT OUT 60Hz CAUTION: QBASS PLUSTM should only be used in systems with a strong subwoofer section. +18dB is a tremendous amount of bass boost and may damage your speakers or create excessive distortion if abused. The optional QBASS REMOTETM: This boost control can be mounted in the dash and will supersede the boost control on the endplate.
TC-X CROSSOVER Your new amplifier has a TC-X Crossover (Total Control X-over®) 30Hz-4kHz (see this guide for Crossover Chart).12dB per octave phase correlated crossover built-in to provide superior system flexibility without the added expense and installation of an outboard crossover. The speaker outputs of your amplifier are high pass, low pass, or all-pass according to the HP/LP/FULL switch on the front endplate.
CROSSOVER DETENT CHART 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 Low Pass Frequency (Hz) @ -3dB 28 28 30 30 30 32 34 36 38 42 46 50 52 54 60 66 76 88 100 116 136 144 168 198 240 286 310 340 380 424 484 576 632 748 932 1076 1428 1700 2436 2830 2980 26 High Pass Frequency (Hz) @ -3dB 52 52 52 56 56 60 64 72 76 80 88 92 100 116 132 148 168 192 216 244 284 348 404 468 512 564 624 700 800 932 1036 1144 1300 1504 1812 2196 2840 41
INPUT COMBINE Your multi-channel amplifier can use both front and rear outputs from your head unit to maintain the ability to fade front to rear, or you can run a single set of RCAs to the front inputs and push in the Rear Input INT/EXT switch on the amplifier endplate to route the front signal to the rear channels as well. ADJUSTING INPUT GAIN 1. Adjust all amplifier input gain controls to just above minimum sensitivity (fully counterclockwise). 2.
Thermal Protection engaged. The amplifiers will turn off and after a minute or so will come back on (the status LEDs will extinguish). In this case, ensure that there is nothing blocking the normal convection airflow of the amplifier. No obstruction should be within 2” of the amplifier on all sides. Note: Low battery voltage will cause the amplifier to run warmer and possibly damage the amplifier. TROUBLESHOOTING NO SOUND Is the LED illuminated? YES NO Check Power and Remote turn-on wire for voltage.
LIMITED TWO YEAR CONSUMER WARRANTY: Directed Electronics promises to the original purchaser, to replace this product should it prove to be defective in workmanship 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.
