Amplifier Design: Class-D amplifiers boast
higher efficiency, produce much less heat, and draw less current than
traditional Class-AB amps. The PDX series is Alpine's totally new
super-efficient power density design of full range class-D amps. They combine
MOSFET power supplies, MOSFET final outputs, and a
thermal management processor, along with a 4-Layer Glass Epoxy PC Board to
create a high-end sound quality without the bulky heat sinks required by most
amps with this much power.
Alpine's unique STAR (Signal Transit for Accurate Response) Circuit PCB design
provides a single common ground for all amp sub-blocks, preventing ground
interference and minimizing internal noise.
2 and 4-ohm Stable: The PDX mono amplifier
can be used with virtually any subwoofers because the PDX amplifier produces the
same amount of power into both 2-ohm and 4-ohm, so you will get the most from
your subwoofers in almost any application.
Speaker Control: The PDX mono amplifier's
groundbreaking damping factor precisely controls the linear movement of your
subwoofer giving your system less distortion and more clarity that exceeds other
Also called an
infrasonic filter, a subsonic filter cuts off extremely low bass (below the
range of human hearing) that many speakers cannot effectively reproduce,
thereby making the amp's power supply and output devices, and the speaker,
more efficient. The subsonic Filter can either be set to 30Hz, 15Hz or Off.
Low Pass Filter: The amplifier features a
built-in Low Pass Filter with a rotary, variable adjustment knob which
permits adjustment of the crossover frequency, by rotating the knob to
select any frequency between 50 to 200 Hz as the crossover point.
For wiring convenience all the inputs and outputs on the amp are on one
Verification Certificate: The amplifier comes with a certificate that lists
the RMS power output of the individual amplifier. It also lists the model
number, serial number, test date, and the test conditions (14.4 volts, 4 ohms).
CEA-2006 Compliant: CEA-2006 is
a new system of testing & measurement methods for mobile audio amplifiers. This
voluntary standard advocates a uniform method for determining an amplifier's RMS
power output and signal-to-noise ratio. The criteria for measuring power uses a
DC input voltage of 14.4 volts and the RMS power output is measured into a 4-ohm
load, with 1% or less Total Harmonic Distortion (THD) plus noise, and at a
frequency range of 20 Hz to 200 Hz when applicable. Signal-to-Noise ratio is
measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4
ohms. CEA-2006 allows consumers to compare car amplifiers and receivers on an
equal basis. The Alpine PDX-1.600 under CEA-2006 regulations is rated at 600
Watts RMS x 1 channel at 2ohm or 4ohm with a 80dBA signal to noise ratio.
The PDX series amps use a new Speaker Quick Connect plug to attach the speaker
wires to the amp. Bare speaker wire, up to 8 gauge, is held in place by a set
screw, the Quick Connect plug then plugs into the amp. Like an RCA jack, the
Quick Connect plug uses a center positive layout, so it fits two ways and both
maintain correct polarity.
Line Level Output: In addition to the line
inputs, the PDX-1.600 has non-fading left and right
female RCA outputs for extra system flexibility.
Stack Amps: Because the PDX series design
generates so little heat, up to three amps can be stacked and bolted together.
All three amps in the series, PDX-2.150, PDX-4.150, and PDX-1.1000 share the
same footprint, so they can be stacked together.
Notes: When stacking multiple amplifiers, do not install
vertically or at an incline. Any stack installation other than parallel to the
vehicle floor, invalidates the warranty.
The top mounted LED Power/Status indicator glows blue when operating
normally and red when one of the protection circuits engages.
Protection Circuits: This
amplifier includes protection circuits to prevent damage due to the following
- ambient temperature too high
supply current too high
short to ground
Controls (front of unit): The controls are
hidden and protected by a removable metal door. The door is removed by
unscrewing one hex-head screw with the supplied allen-wrench. The door is to be
secured back into place once the controls are set.
- Crossover Frequency:
rotary control to select the low pass crossover frequency, variable from 50 to
200Hz, 24 dB/octave
- Gain Control: rotary
control to set the amplifier's gain according the level of the incoming
signal, continuously variable from 0.1V to 8.0V depending on the Gain Range
- Gain Range: select 0.1-1.0 volt or
1.0-8.0 volt range for the rotary control depending on the output RCA level
of your head unit
- Subsonic Filter:
off, 15 Hz, or 30 Hz
Inputs and Outputs (rear of
unit): The amplifier comes supplied with two allen-wrenches to tighten the
amp's terminals and secure your wiring.
- Power and Ground terminals: power and ground terminals are
gold plated set screw terminals, will accept up to 4 gauge bare wire, Alpine
recommends using a 4 gauge wire but a 6 gauge wire minimum can be used
Remote Turn-on terminal: gold plated set screw terminal, will accept
12 gauge to 8 gauge bare wire
Speaker terminals: the
speaker output uses Alpine's Speaker Quick Connect plug
Line Level Input: Left and right
female RCA jacks, gold plated
- Line Level
Output: Left and right
female RCA jacks, gold plated