Inputs and Outputs Notes
V12 AccuClass-D Mono Amplifier:
The V12 AccuClass-D amplifier design allows it to deliver massive power without
correspondingly huge current draw. Class D amplifiers are very efficient, and
generate very little heat.
Gain Factor: Gain Factor is a
unique and patent-pending digital processing technology that allows more audible
power to be delivered even when pushing the amplifier to its limit. Unlike all
analog compensation techniques, Gain Factor interpolates and modifies the signal
at the individual digital data level, enhancing smaller signals more and larger
signals less without driving the amplifier into hard clipping. The result is
more clean power, sooner on the volume knob.
Hood: The amplifier has a
hood that flips up to reveal the control panel and LCD display. The control panel consists of
five buttons: Display, Mode, Enter, <, and >. These buttons are used to
navigate the menu that includes all the adjustments on the amp (input level,
crossover, EQ, time correction, phase, etc). When closed, the LCD display is
visible through the smoked plastic window, allowing you to read the amp's
temperature, current draw or input voltage readout. Two Allen-head screws secure
the hood in the closed position.
End Cover/Terminal Cover: The
amplifier has a black end cover and a silver terminal cover that can be added to
improve appearance after the amplifier has been installed. Both the end cover
and terminal cover come with hardware to hold them in place. When installed, the
end cover and terminal cover add approximately 1-3/8" to the depth of the
In-Line Fuse Holder: This amp
comes with an in-line AGU fuse holder and an 80-amp AGU fuse. Since the
amplifier has no "built-in" fuse, this fuse should be placed in line
with the positive power lead at the amplifier. You should also place an
appropriate fuse on the main power lead at the battery.
Verification Certificate: The
amplifier comes with a certificate that informs you of the total RMS output of
the particular amplifier. It lists the model number, serial number, test date,
and the test conditions (voltage, impedance). The unit we reviewed measured
1,078 watts RMS into 2 ohms at 14.4 volts.
Display: The digital display
can be switched between input voltage, current draw, and internal temperature in
Celsius or Fahrenheit.
Bass Engine DSP: The MRD-M1000
uses digital signal processing to offer six sophisticated Bass Engine controls
without signal loss or sound degradation. The Bass Engine features include:
- Digital Time Correction: Time
correction allows you to time align this amp with others in the system. This is
particularly useful to maximize SPL if there are multiple subs and sub amps. The
adjustment range runs from 0-10ms in 0.1ms steps.
- Digital Parametric Equalizer: A fully
adjustable parametric EQ is built into this amp. The center frequency is
adjustable from 30 to 160Hz in 1/12 octave steps. The Q value of the EQ curve is
selectable between 0.5, 1, 2, 3, 4, and 5. The EQ level is adjustable from -12dB
to +12dB in 1dB steps.
- Built-in Variable Crossover: The built-in low-pass crossover is adjustable from 30 to 200Hz in
1/12 octave steps with a slope of 24dB/octave.
- Sub-sonic Filter: The sub-sonic
filter is used to filter out low frequencies that you cannot hear but can
"rob" power from the amplifier. The crossover point is variable
between 15Hz and 50Hz in 5Hz steps.
- Bass Compensation: The Bass
Compensation circuit is used to enhance low-end bass definition. When engaged,
the Bass Compensation circuit provides bass with sharp auditory impact, even
with a small diameter woofer. Once turned on, you can select the Bass
Compensation level that best suits your desired results: Bass Comp 1, Bass
Comp 2 or Bass Comp 3.
- Phase Control: The phase is
selectable between 0 and 180 degrees.
Multi-Amp Installation: Because
the above adjustments are all digital and discrete, two of these amplifiers can
be used to power the two voice coils of a DVC woofer (technically this is true
of any amp, but with analog adjustments an oscilloscope is needed to ensure the
outputs are identical).
Amplifier ID: Alpine's RUX-4280
Remote Amplifier Control Center (RACC) will control up to eight V12
AccuClass-D amplifiers. For this reason each amp needs its own ID when more than
one amp and the RACC are used.
Remote Level Control: This
amplifier's level can be controlled remotely with the optional RUX-4180
Subwoofer Level Control. Note: The RUX-4180 can only control one
amplifier. For multiple amplifiers, the RUX-4280 Remote Amplifier Control Center
should be used.
Turn On Delay: The amp's turn-on
time is adjustable. This is useful for eliminating the loud "thump"
that occurs when multiple amplifiers are turned on simultaneously.
Output Disable Mode: The Output
Disable Mode turns
off the power output of the amp while leaving the control functions active. This
should be used when adjusting the DSP function. Only the power of the DSP
circuit is on and in the current saving state. After making adjustments, the
output disable mode should be turned off.
Memory: All the settings on the
amp can be stored in memory for easy return to your preferred values.
amplifier has a 3-way protection
circuitry to guard against accidents and undesired operations. It includes
protection for Short
circuit, Over-voltage, and Thermal overload. When the amplifier goes into
protection mode, the LCD display will show a Error code explaining the cause of
Inputs and Outputs
Battery (+12 V)/Ground (GND): The
Battery and Ground terminals are gold-plated
set-screw terminals (approximately 3/8" diameter) that will accept up to 4 gauge wire.
A 4mm Allen wrench is included to tighten/loosen the set screws. An 80-amp AGU
fuse and an in-line fuse holder is supplied for protecting the amp. The fuse
holder should be placed in line with the positive power wire at the amplifier.
In addition, you should always protect the main power lead for the amplifier
system with an appropriate fuse at the battery.
Remote (turn-on): The remote
terminal is gold-plated set-screw terminal that will accept up to 10 gauge wire
(approx. 3/16" diameter). A 2.5mm Allen wrench is included to
tighten/loosen the set screw.
Speaker Output: The speaker
terminals are gold-plated screw terminals that will accept a spade or ring
connector up to 1/2" wide. You can convert the terminal to a set-screw
terminal by substituting the installed Phillips-head screw with the supplied
gold-plated 2.5mm Allen-head set screw. As a set-screw terminal, it will
directly accept up to 8-gauge speaker wire.
RCA Input/Output: The amplifier
includes gold-plated RCA
line input jacks (there is no speaker-level input) and gold-plated RCA
Controller: The amp has a 7-pin
female DIN jack for
connection to the RUX-4280 Remote Amplifier Control Center (RACC) or the
RUX-4180 Subwoofer Level Control.
RMS Power Rating
(measured at 14.4V):
- Into a
4-Ohm Load: 500 watts x 1
- Into a 2-Ohm Load: 1000 watts
RMS Power Rating
(measured at 12.0V):
- Into a
4-Ohm Load: 350
watts x 1
- Into a 2-Ohm Load: 700 watts
Note: Minimum impedance is 2