Amplifier Features
Amplifier Controls
Amplifier Connections
Subwoofer
Enclosure
Amplifier Features
Power Supply: The MRP-M500 amplifier's power supply uses
MOSFETs to convert DC battery voltage to the higher DC voltages needed for high
power. It supplies positive and negative voltages around 0V, rather than around
6V as with conventional single-polarity power supplies. The result is higher
power levels and a dynamic range wider by as much as 10dB.
Inputs: The amplifier offers both line-level and
speaker-level inputs for 2 channels. The supplied speaker-level input harness
allows you to connect this amplifier to a receiver without preamp outputs;
aftermarket or factory. The speaker level inputs will accept the output from a
high powered radio.
Terminal Covers: The amp comes with two plastic covers that
protect and insulate the RCA, power, and speaker connections. Four supplied
machine screws attach the covers to the amplifier.
Amplifier Controls
Low Pass Filter: The amp is equipped with a 50-200Hz
variable low-pass filter with a slope of 24dB/octave. This being a mono
subwoofer amp, the crossover is always engaged.
Subsonic Filter: This amp utilizes a subsonic filter at 15Hz
to eliminate super low frequencies that can rob power and damage speakers. The
subsonic filter operates at all times, and cannot be turned off.
Bass EQ: The Bass EQ circuit provides a variable boost
(0-12dB) at 50 Hz.
Amplifier Connections
Left Side Of Amplifier:
- GND (ground): gold-plated screw terminal, 0.33" wide
- Battery: gold-plated screw terminal, 0.33" wide
- Remote: gold-plated screw terminal, 0.33" wide
- Speaker Output: gold-plated screw terminal, 0.33" wide
Note: Alpine recommends 8 gauge power and ground wire
(minimum).
Right Side Of Amplifier:
- Line Inputs: 1 pair of gold-plated stereo RCA jacks
- Speaker Level Input: Molex plug input for supplied
4-pin harness
Subwoofer
Woven Fiber/Kevlar Reinforced Pulp Cone: This Alpine Type-E
subwoofer features a two-piece parabolic woven fiber and Kevlar reinforced pulp
cone. Kevlar adds strength and tear resistance to the woofer cone while
maintaining the benefits of a pulp cone design. The lightweight cotton fiber
design provides a faster and more dynamic response from the woofer.
Santoprene Rubber Surround: The high-excursion, tapered
half-roll, injection molded Santoprene rubber surround is durable and resistant
to the elements, resulting in a very reliable performance. The surround is
specially designed to resist deformation that is common in woofers with wide
surrounds. This design gives the surround more control over the woofer cone to
reduce distortion and possible driver failure.
Progressive Nomex Spiders: This subwoofer utilizes a
Progressive Nomex spider for stability and mechanical durability. The custom
progressive roll gives the woofer a longer, more linear stroke with maximum
centering and restoring force. Special edge control design and Nomex
construction provide excellent tear resistance, strength and long-term
reliability.
Voice Coil: The Alpine SWE-1243 features a 4-layer single
voice coil made from 180-degree high-temperature wire on an aluminum bobbin.
Airflow Optimized Extended/Vented Pole: This SWE-1243
features an extended pole piece which provides optimum airflow for the woofer.
Custom High Strength Steel Basket: The frame is custom
stamped from high strength steel.
Speaker Terminals: This Alpine Type-E subwoofer features a
pair of heavy duty push-terminals on one side of the woofer's basket that will
accommodate up to 8-gauge speaker wire.
Tinsel Leads: The Type-E subwoofer uses insulated 16-gauge
stranded tinsel leads.
Gasket Cover: Alpine uses a Concealed Mount Gasket System to
cover the mounting screws for a clean look. The black rubber gasket ring comes
already installed on the woofer and needs to be removed before drilling the
mounting screws (not supplied). The gasket ring then snaps back into place once
the woofer is mounted.
Protective Grille: The Alpine SWE-1243 Type-E subwoofer
comes supplied with a high impact protective grille. The black plastic grille
snaps onto the woofer without the need for any additional hardware. The rubber
gasket cover must be removed when using the grille. The grill also hides the
mounting screws, as well as protects the woofer. The grille adds 0.9425" to the
woofer's height (1.6875").
Enclosure
Materials: The Sound Ordnance BB122-100S Bass Bunker is an
unloaded, hatchback-style sealed enclosure for a dual 12" subwoofers. It is
constructed of 5/8" MDF (medium-density fiberboard), covered in black carpet.
Internal Box Volume: The enclosure has two separate
chambers, each with 1.035 cubic feet of airspace.
Terminals: The BB122-100S is equipped with two pairs of
spring-post speaker terminals, one for each chamber, mounted in the rear panel.
The spring terminals will accept bare wire, pin connectors, and single banana
plugs, but are spaced too far apart for dual banana plugs. Inside the enclosure,
each set of terminals has an attached 18" length of speaker wire for connecting
the subwoofer.
Brackets: Brackets for securing the enclosure to your
vehicle are recommended.
