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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1 Introduction Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1 Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . ..Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3 Installation Equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Page 5 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8 Possible Equalization Curves. . . . .
INTRODUCTION Congratulations on your selection of the Hafler MAC-104 Octave Equalizer. You have acquired a product that will greatly enhance the performance of your auto sound system. 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.
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 configuration of the MAQ-104.
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 MAQ-104 > Consult a professional installer if necessary > Mount the unit securely in a clean, dry location using the four internal mounting holes.
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 1 2 0.5 1.0 2.0 4.0 ON ON OFF OFF ON OFF ON OFF 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.
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.
BE CAREFUL! PINK NOISE CAN HURT SPEAKERS AT EXCESSIVE VOLUME. MAKE SURE VOLUME ON PINK NOISE GENERATOR IS DOWN BEFORE TURNING ON. 6) Observe output response 7) Turn off pink noise and re-input source. Listen to system with a piece of music you are familiar with. (NACA disc) Does system sound like it looks? If not, reposition microphone until system response looks like it sounds. Major system problems, for instance large response “holes” or “peaks”, should be solved by correcting speaker or system problems.
response, and some microphone positions will obscure problems instead of showing them. > The audible effect of response problems is a product of both the magnitude of the error and its width. A 9-dB “hole” one/third octave wide is less audible than a 2-dB “dip” two octaves wide. Try for an average response equally above and below the desired response over each octave span. > The human ear averages the overall sound-field response by complex physiological and psychological processing.
APPLICATIONS 4 CHANNEL OPERATION 4 Channel operation is accomplished by using all 4 inputs and outputs. Figures 2-3 show typical hook up examples. 2 CHANNEL OPERATION 2 channel operation of the MAC-104 uses only 2 of the 4 inputs. Figures 4-5 show some typical examples. 2 CHANNEL X 2 OPERATION (DUAL CURVE) This is accomplished by feeding the source outputs into both inputs of the MAQ-104. Next tie both the MAQ-104 outputs together.
SPECIFICATIONS The MAQ-104 is deliberatdy restricted to 12 dB of boost or cut per band. This is meant to discourage attempts to correct large system response problemswith the equalizer. System response errors greater than about 6 dB over a span of an octave or more should be corrected elsewhere in the system, by correcting speaker or amplifier problems. Excessive use of equalization is likely to overdrive amplifiers, speakers, or other components.
WARRANTY From 1 year from the date of purchase (The Warranty Period), Hafler warrants that any unit which fails to function properly under normal use due to a MANUFACTURING DEFECT, when installed and operated according to the Owner’s Instruction Manual enclosed with this unit, will be repaired or replaced, at Hafler’s option, without charge to you for parts or labor for the actual repair work.
Dear Hafler Owner, The gloss black insert on the face-plate of your new Hafler equipment has been packaged with a removable protective coating. Please peel off this protective coating following installation. When cleaning the face plate, we advise a soft cotton cloth with a non-abrasive cleaner that is safe for Lexan and painted surfaces. DO NOT use paper towels or any coarse material to clean the face-plate as these materials may scratch the insert.
