Directed Electronics A1200-4, A600-4 User Manual
AMPLIFIER MODELS
A600/4 A1200/4
TABLE OF CONTENTS
Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
CEA Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Fuse Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Amplifier Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Tools/Parts for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Ground Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Charging System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Current Draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Power Wire Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Power Lock Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Amplifier Bridging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Mixed Mono Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
A600/4 Front Plate Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
A600/4 End Plate Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
A1200/4 Front Plate Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .17
A1200/4 End Plate Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
A600/4, A1200/4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . .21
Advanced Instrumentation Input . . . . . . . . . . . . . . . . . . . . . . . . .22
QBASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
QBASS/QBASS PLUS Specifications . . . . . . . . . . . . . . . . . . . . .23
QBASS PLUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
TC-X Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Crossover Detent Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Input Combine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Adjusting Input Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
High Mass Internal Heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
AP-IV Protection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
1
CONGRATULATIONS
Thank you for choosing
Precision Power
TM
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 Power
TM
product reflects our commitment
to offer you unparalleled performance and quality for years of
dependable service and listening enjoyment.
SERVICE
Do not attempt to service
Precision Power
TM
products yourself.
Performing maintenance on your audio equipment will void the
warranty. Many parts of the
Precision Power
TM
product are custom
built to our specifications. Our factory parts are not made
available to anyone else nor are they for sale. Our goal is to
make sure that your
Precision Power
TM
product will always sound as
good as the day it was purchased. Contact your
Authorized
Precision PowerTMDealer
about obtaining any warranty service
through
Precision Power
TM
. (See the Warranty on the outside of the
back cover).
CAUTION
Extended use of a high powered audio system may result in hearing
loss or damage. While
Precision Power
TM
systems are capable of
“Concert Level” volumes with incredible accuracy, they are also
designed for you to enjoy at more reasonable levels all of the sonic
subtleties created by musicians. Please observe all local sound
ordinances.
2
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
QBASS
TM
Bass Boost
(A600/4)
QBASS Plus
TM
Bass Boost
(A1200/4)
High Voltage Input Capability with -12dB Attenuation Switch
Gold Plated RCA Input and Output Connectors
PowerLock
TM
Speaker and Power Wire Connectors
Mixed Mono/Stereo Operation
WHAT’S INCLUDED
Amplifier (with speaker and power plugs mounted)
(4) Mounting screws and washers
2mm hex wrench
2.5mm hex wrench
3mm hex wrench
CEA SPECIFICATIONS
3
AA660000//44
Power Output: 50 Watts RMS x 4 at 4 ohms and <
1% THD+N
Signal to Noise Ratio: -87 dBA (reference 1 Watt into 4 ohms)
Additional Power Output: 80 Watts RMS x 4 at 2 ohm at 14.4 Supply<
1% THD+N
AA11220000//44
Power Output: 110 Watts RMS x 4 at 4 ohms and <
1% THD+N
Signal to Noise Ratio: -94 dBA (reference 1 Watt into 4 ohms)
Additional Power Output: 140 Watts RMS x 4 at 2 ohm at 14.4 Supply<
1% THD+N
SPECIFICATIONS
Nominal Power Ratings
MODEL
4ohm STEREO 2ohm STEREO 4ohm MONO
A600/4 4 X 50 4 X 75 2 X 150
A1200/4 4 X 100 4 X 150 2 X 300
General Specifications
Frequency Response 20Hz - 20kHz
Power Bandwidth 10Hz - 50 kHz
Total Harmonic Distortion + N <0.05%
Input Topology Instrumentation
Input Sensitivity 150mV - 12 Volts RMS
(with -12dB pad)
Input Impedance 40 kOhms
Load Impedance (stereo) 2 - 8 Ohms
Load Impedance (bridged) 4 - 8 Ohms
Supply Voltage 9 - 16 Volts
Damping Factor >150
Slew Rate >20V/µs
QBASS
TM
Up to +18dB @ 40Hz
QBASS PLUS
TM
Up to +18dB Boost
@30, 36, 44, or 60Hz
Crossovers 12dB/Octave
Crossover Frequency 30-4kHz
Idle Current: A600/4 1.0 Amps
A1200/4 1.8 Amps
Dimensions
Length Width Height
A600/4 21-½” 10-½” 2-¾”
A1200/4 24-¾” 10-½” 2-¾”
4
5
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. You may also want to add a power
distribution block near your amplifiers to distribute large gauge
power cable to multiple amplifiers.
Amplifier Fuse
A600/4 50A
A1200/4 70A
AMPLIFIER STATUS LEDS
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.
6
1
2
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. (or nut, bolt,
flat washer, star washer) (see details)
2 - Ring connectors (large enough to accommodate your method of
grounding)
In-line fuse or circuit breaker
Power and ground wire
Speaker wire - 12-16 gauge
Grommets (sized to work with the power wire you plan to use in your
installation)
Tube of silicone sealant
7
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.
When using 16 gauge wire or larger, run the speaker wires from the
amplifier location through the vehicle to the front and rear speakers.
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