Digital Signal Processor
Overview: The AudioControl D-6.1200 is a 6-channel amplifier, featuring AudioControl's powerful Matrix DSP
sound processing. The amplifier accepts speaker-level or line-level inputs, and can be
configured for 3-, 4-, 5-, or 6-channel operation. The D-6.1200 features a black brushed
aluminum chassis, with black powder-coated cast alloy heat sinks and a one piece
bottom panel. A black brushed-aluminum cover is provided to protect the amp
controls from tampering. A 2.5mm Allen wrench (supplied) is needed to remove the
Maximum Input Level Control (MILC): The amplifier analyzes
the input signal to detect any clipping. If the signal reaches the level of
clipping, the MILC Source Clip LED glows red, prompting you to turn down the
gain level. When the gain level is maximized, a green Maximized LED will glow to
indicate the gain, for that set of channels, is set to the optimum level.
GTO (Great Turn On) Signal Sense: If you are connecting the
amplifier to a factory stereo, or an aftermarket unit without preamp outputs and
a remote turn-on lead, the GTO Signal Sense circuitry can turn on the amplifier
when an audio signal is detected on either the line-level or speaker-level
inputs. After a period of time with no signal input, the amp will turn itself
ACR-3 Remote: The optional AudioControl
ACR-3 wired remote is a dual-function remote that lets you adjust both the
level of the main and line outputs, as well as recalling memory presets, all
from the driver's seat. The ACR-3 has two LED indicators and a rotary/push-knob.
When the blue LED is on, the remote knob raises and lowers the output level.
When the knob is pushed in, the red LED will light, allowing the knob to recall
memory presets when turned. You can further configure the operation of the ACR-3
in the Digital Signal Processor software.
Top Panel: The D-6.1200 has a removable top panel that
allows you to view numerous LED indicators during setup, and the on/off switch
for the GTO (Great Turn-On) Signal Sense function. The LED indicators include:
- Power: The Power LED illuminates in green when the
amplifier is powered on and is operating normally. In addition, blue LEDs
inside the unit will glow in a particular pattern during power up, reset
boot, or if protection is activated.
- Protection: The Protection LED will flash in the event
of a short circuit (one time or repeated), Under Voltage, Over Voltage, DC
Offset, or Thermal Overload in the heatsink or at the transformer. The amp has built-in diagnostic codes
indicated by a particular flashing pattern, telling you exactly where the problem
has occurred. A chart of the protection diagnostic codes is provided in the
Quick Start Guide.
- Communications LED: This LED lights when there is USB
activity between the amp and your computer during set up.
- MILC Source Clip LED: The MILC (Maximum Input Level
Control) level-setting circuit prevents clipping and distortion. It
calculates when the waveform of an incoming signal on input 1 or 2 is
clipping and lights this LED. The level of the incoming signal should be set
just prior to MILC LED coming on.
- Maximized Input LEDs: These LEDs illuminate when a
maximum audio signal is present on any of the analog audio inputs. Signal
levels should be lowered if these LEDs are on a lot. Three LEDs are provided,
labeled Front, Rear, and Sub.
- Maximized Output LEDs: These LEDs illuminate when there
is maximum signal present on any of the audio outputs. Signal levels should
be lowered if these LEDs are on a lot. Four LEDs are provided: Outputs 1/2, 3/4,
5/6, and Line Out.
Connections: The D-6.1200's connections are aligned along the
front of the amplifier for ease of installation. The amp's connections include:
- Fuses: Three 40A ATO blade-type fuses are installed in
- Power: Set-screw terminals are provided for connecting
+12V Power, Ground, and Remote In. The Power and Ground
terminals will accept up to 1/0-gauge wire, however, the recommended wire
size is between 4 and 1/0 AWG. The Remote In terminal accepts
up to 8-gauge. A 120A fuse should be placed on the power wire, no
more than 18" from the battery.
- Line Level Inputs: Three pairs of RCA jacks are provided
for connecting the amp to the source unit via RCA cables.
- Line Level Output: One pair of RCA jacks for feeding
the signal to another amplifier.
The maximum output is 8.5V RMS.
- Speaker Level Inputs: Four sets of removable Phoenix
(or Euroblock) connectors are provided for connecting the source unit via
The connectors are labeled 1-2, 3-4, 5-6, and Front High (for tweeters).
- ACR-3 Control: This RJ-14 telephone-type connection
allows you to plug in the optional ACR-3 Remote. The ACR-3 is used to change
the output level and for recalling memory presets.
- USB: A micro-USB (Type-B) is used for connection to a
computer for DSP configuration. A 2-meter USB cable is provided.
- Speaker Output: Three removable Phoenix connectors are
provided for connecting speaker wire. The amplifier will accept a load
impedance of 2Ω or higher in stereo (4Ω or higher when bridged).
- Option Port: A multi-pin input is provided for
connecting a future optional AudioControl Bluetooth adapter for streaming
audio into channels 7 and 8 from your Bluetooth-enabled devices. No other
details are provided by the manufacturer.
Digital Signal Processor
DM Smart DSP: The D-6.1200 includes a micro USB (Type-B) port
to connect to a laptop (USB Type-A to micro-B cable included), allowing you to
use AudioControl's DM Smart DSP app. This is a fully-featured Matrix DSP
interface designed to give you control over every aspect of the processor. The
display has three main sections: Input View, Output View, and Dashboard View,
which is a combination of the Input and Output Views. The DSP has four memory
slots to save the settings for future use.
Input View: The DM Smart DSP lets you route any input to any output.
The inputs are grouped in pairs: Channels 1-2, Channels 3-4, Channels 5-6, and
Channels 7-8. The inputs are named Front, Rear, Sub, and Front High, however,
you can name each channel pair as you wish. In the input view, you can adjust
the gain (-20dB to +12.0dB in 0.1dB increments), polarity (0 or 180 degrees),
and the time delay (up to 21.3 ms in 0.1 ms increments). You can also sum
together the channels to mono.
Output View: The Output View allows you to set the signal
routing and channel summing, output levels, crossovers, EQ, and AccuBASS
settings. You can select any of the channel pairs one at a time: Channels 1-2,
3-4, 5-6, and the Line Output. You can also select the functions of the optional
ACR-3 remote to be used as a level control for all output channels, any of the
output channel pairs, or the line output. Digital Time Alignment can be applied
independently for the left and right sides of the selected output pair. You can
key in the distance (up to 288") for each speaker to the listening position, or
use the provided slider to select the distance.
Real Time Analyzer (RTA): The software provides a Real Time
Analyzer (RTA) for both inputs and outputs so you can see graphically the level
and frequency distribution of the signals. The sensitivity of the RTA can be set
between 50dB and 90dB (in 10dB increments), and the speed of the display set to
Fast, Medium, or Slow.
30-band Equalizer: The DM Smart DSP offers a 30-band EQ on
the Output View, allowing you to tweak the output of any of the channel pairs,
plus the Line Out. Each EQ band is adjustable from -12dB to +12dB. If you want a
simpler EQ, you can switch to a 10-band or 14-band EQ. The 30 bands cover
between 25Hz to 20kHz in 1/3-octave increments. The 10-band and 14-band EQs have
1 octave bands from 31.5Hz to 16kHz, however, the 14-band EQ adds extra center
frequencies at 40Hz, 50Hz, 80Hz, and 100Hz.
Crossovers: The DSP offers low-pass, high-pass, and
band-pass Linkwitz-Riley crossovers for any or all outputs. You can select the
cutoff frequencies from 25Hz to 20kHz by keying in the frequency value or using
the slider. You can also set the crossover slope at 12dB or 24dB per octave.
AccuBASS: The AccuBASS control can be applied to or bypass
any of the output channels. There are two slide controls: Threshold (at which
frequency to start boosting the bass) and Level (how much bass to apply).
Power Output: The D-6.1200 has the following power specs:
- 6 x 125 W RMS @ 4 Ohms
- 6 x 200 W RMS @ 2 Ohms
- 400 W RMS @ 4 Ohms bridged
Frequency Response: 10Hz - 30kHz
S/N Ratio: 102dBa (ref. 200 watts @ 2 ohms)
THD+N: < 0.1%
- Line Level: 250mV to 8V RMS
- Speaker Level: 3V to 40V
Dimensions: Width 11.893", Height 2.106", Depth 8.054"
Weight: 7.2 pounds