Hafler MAQ-104 User Manual
OWNER’S MANUAL
OWNER’S MANUAL
MAQ-104 CAR AUDIO
OCTAVE EQUALIZER
A Division of Rockford Corporation
613 South Rockford Drive
Tempe, AZ 85281
602-967-3565
INDEX
Introduction ...........................
Features ..............................
Nomenclature ...........................
Installation
Equalization
Applications ............................
Possible Equalization Curves...................
Specifications ...........................
Possible System Configurations..................
Warranty .............................
.............................
............................
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Page 12-17
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INTRODUCTION
Congratulations on your selection of the Hafler MAC-104
Octave Equalizer. You have acquired a product that
greatly enhance the performance of your auto sound sys-
tem. Because of the sophistication of this advanced
electronic device, we recommend that you thoroughly
understand the contents of this manual before operation
and installation
FEATURES
Full 4 channel operation maintains ability to fade.
> Single chassis provides straight forward installation
10 Bands per channel for optimal adjustment.
> + 12 dB of boost and cut per band.
> Each channels flat position is located by a center click
Defeat switching front and rear.
> Perfect for trouble shooting.
> Aid in vehicle curve adjustment
> Can be used for 2 channel dual curve installation
Multi-Mode operation.
> 4 channel 4 way
> 2 channel 2 way
> 2 channel dual curve
Programmable remote turn-on delay circuitry.
> Switch selectable delay times from .5 to 4 seconds
> Remote in from source unit is delayed and then
passed on to the amplifiers.
> Provides a delay period for the stabilization of all
electronics prior to amplification.
> Eliminates turn on/off thump.
Gold plated RCA Connectors
will
in each potentiometer.
(See Figure 6)
1
Hinged top provides easy access to crossover modules.
>
Detailed owner’s manual located conveniently inside
hinged top.
>
Cosmetically "clean” look enhances any installation.
>
Mounting holes concealed internally.
Output sensitivity adjustment.
>
Insures compatibility with any radio or head piece.
>
Independent adjustment per channel.
NOMENCLATURE
Refer to figure 1 for the location of the inputs, outputs,
potentiometers, and various switches used in the con-
figuration of the MAQ-104.
Front/Rear defeat switch: These two switches will either
make the MAQ-104 circuitry active or bypass it completely.
See Figure 1 for active/defeat positions.
Delay switch: These dip switches are used to program the
remote turn-on delay period.
Frequency band boost and cut: Each adjustment potentiometers on the MAQ-104 will allow you to boost by turning
any potentiometer clockwise, and cut by turning counter
clockwise.
WARNINGS
To prevent possible system damage, please follow the
guidelines below.
>
Never connect or disconnect any component of the
sound system while power is applied to the system.
>
Prolonged exposure to high sound pressure levels
can cause hearing impairment - please use common
sense when listening to your auto sound system.
2
INSTALLATION
The MAQ-104 is a precision piece of electronic equipment
and with proper installation will provide years of trouble-free
operation. The following steps will help to reduce the
amount of time and effort required to install the
> Consult a professional installer if necessary
> Mount the unit securely in a clean, dry location using
> Make sure the installation does not interfere with the
POWER CONNECTOR
The four power wires on the MAQ-104 should be connected
as follows:
Yellow - connect to the + terminal of the
Red - Connect to the remote turn-on lead from the
source.
Black - Connect to the chassis of the vehicle The ground
point in the car should be a piece of chassis metal that
is welded to the main body of the car. Painted surfaces
should be scraped or sanded before the ground lug is
bolted down, (Cover the bare metal area with paint or
grease to prevent rust.)
Blue - Connect to the remote turn-on leads of the amps
MAQ-1
04
the four internal mounting holes. The four mounting
holes are located adjacent to the circuit board
normal operation of the vehicle
battery.
FUSES
The battery wire (yellow) is fused on the circuit board with
an AGC 1 amp fast blow fuse. The remote out wire (blue)
is also fused on the circuit board with an AGC 1/2 amp fast
blow fuse. In order to assure continued protection, replace
only with the proper fuse values. See Figure 1 for proper
fuse locations.
PROGRAMMABLE TURN-ON DELAY
The MAC-1 04 has the capability to delay the remote turn-on
voltage to the amplifiers by a period of up to 4 seconds.
This delay period is necessary in order to allow the signal
3
processing circuitry prior to the MAQ-104 sufficient time to
stabilize before power is applied to the amplifiers. This
results in minimum turn-on/turn-off thump.
To program the turn-on delay period, set the relay dip
switches as shown below:
.
TIME
0.5 ON ON
1.0
2.0 OFF
4.0 OFF OFF
1
ON OFF
2
ON
FRONT/REAR DEFEAT SWITCHES
The switches in figure 1 are shown in the active position
(in the up position with the power connector on your upper
left.) By pushing the toggle down this defeats each respec-
tive front and rear channel.
FREQUENCY BAND BOOST AND CUT
On the MAQ-104 there are 10 bands of center frequency
boost and cut. By selecting a frequency noted on the PC
board you can boost or cut any band. Boost is accomplished by tuning the potentiometer clockwise. Cut is
done in reverse fashion counter clockwise. The flat position is noted by a center detent on each potentiometer
INPUT LEVEL SENSITIVITY
The MAQ-104 is designed to be used at pre-amp and radio
output levels only (500 to 750 mVRMS). Higher input levels
to the MAQ-104 may overload the circuitry and must be
attenuated.
OUTPUT SENSITIVlTY ADJUSTMENT
There are four output gain adjustment potentiometers on
the MAQ-104. The output levels must be set in such a way
as to not overdrive the amplifiers.
A proper adjustment can be achieved by adjusting both the
source unit and MAQ-104 output levels. If you find that your
4
over driving the amplifiers turn down the output levels of
the source and then fine adjust the MAQ-104.
EQUALIZATION
Response problems created by the audio environment (the
car’s acoustics) usually can be corrected with a good
quality equalizer that has flexible and precise adjustment.
The MAQ-104 provides this flexibility and precision.
Response problems created by poor system design must
be corrected at the amp and speaker level.
EQUALIZING WITH A REAL TIME
ANALYZER
For best resolution, a
Analyzer (RTA) or a swept spectrum analyzer with
tave resolution should be used. A lo-band, 1-Octave
resolution RTA will give decent results, but is harder to use.
Either RTA method will require a pink noise generator.
STEP BY STEP
1) Extend MAQ-104 input/output cables and B + , turn-on
and ground to a convenient location outside the vehicle.
(A kit is available from your Hafler dealer.)
2) Test the system to ensure proper function
and check level by switching the defeat switch quickly.
3) Position microphone and stand in car seat, head height,
ear level (preferably inside ear) with microphone facing
forward. Microphone placement will have a significant
effect on frequency response, and moving the microphone
around in the driver’s area will give a good idea of overall
response.
4) Calibrate RTA.
5) Input pink noise to MAQ-104 on channel corresponding
with microphone placement. Set volume level to 90-100
dB.
30-band (1/3-Octave)
-
“zero” all pots
Real-time
1/3-Oc-
5
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