MCLaren Sound Systems MLQ-750 Programming manual
1/2 DIN + 7 BAND GRAPHIC
EQUALIZER/CROSSOVER
MLQ-750
Owner’s Manual
and
Installation Guide
CONTENTS:
1. FEATURES .......................................................................... 1
2. CONTROLS ......................................................................... 2
3. OPERATIONS
Setting system volume ......................................................... 3
Adjusting the controls ........................................................... 3
Setting the low-pass frequency ............................................ 3
Connecting an MP3 Player or video unit ............................. 3
Care and Maintenance ......................................................... 4
4. INSTALLATION AND WIRING
What is included in the box .................................................. 4
Before Starting ..................................................................... 4
Wiring Diagram .................................................................... 5
5. SPECIFICATIONS ............................................................... 6
1/2 DIN + 7 BAND GRAPHIC
EQUALIZER/CROSSOVER
MLQ-750
1. FEATURES
The MLQ-750 is a 7-band stereo equalizer/crossover specically created for the
mobile environment. The MLQ-750 provides powerful features in a compact size:
• Seven equalization bands (50Hz, 125Hz, 315Hz , 2.2KHz, 6KHz and 16 KHz)
• Each frequency adjustable from -12 to + 12Db (-15 to +15dB for subwoofer
frequencies ).
• Subwoofer output uses a built-in 18dB per octave electronic crossover xed at
60Hz or 90Hz.
• Three stereo RCA outputs to drive front rear, and subwoofer audio ampliers.
• An auxiliary stereo RCA input for use with portable devices, such as an MP3
player or DVD player .
• Separate controls for master volume, subwoofer volume (sub level), front/rear
fader, and selection of main or auxiliary inputs.
• Extended frequency response from 20Hz to 30KHz with exceptional 100dB
signal-to-noise performance.
• Gold-plated RCA connectors to ensure the best audio signal output.
• ISO mounting holes and removable trim ring for custom installation.
1
2. CONTROLS
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MLQ-750
MLQ-750
7 BAND GRAPHIC EQUALIZER
SUBWOOFERCROSSOVER& LEVELCONTROL
3. OPERATIONS
Setting system volume
1. Turn the master volume and subwoofer level controls to their minimum settings.
2. Turn the source unit on and increase the volume until you hear distortion.
3. Reduce the volume to just below the distortion point (approximately 80% of
full Volume).
This is the maximum usable musical signal for the source unit. Turning the
volume beyond this point increases noise and distortion without increasing the
musical signal.
Note: Once you set the source unit volume, do not change it. Always use the volume control on
the MLQ-750 as the master (main) volume control. The MLQ-750 has better electronics, a higher
sound to noise ratio, and is more linear than the volume settings on any source unit available.
Adjusting the controls
The MLQ-750 provides a graphic adjustment band for each of seven frequency
ranges: sub, low, mid, mid-high and high frequency. You can adjust the center of
each frequency band to ne tune the acoustical response to your vehicle’s interior.
1. Set all frequencies to the center position. The small dot on the control knob should
be set at 12 o’clock.
2. Play your favorite music track and adjust the individual controls to suit your taste.
Avoid extreme settings, which can distort musical peaks.
3. Increase or decrease the equalizer gain controls to suit your taste.
4. If your system includes a subwoofer, slowly increase the subwoofer level until you
hear a solid bass.
5. If your system includes rear speakers, adjust the fader control to add rear sound.
Set it so most of the music comes from the front and only lls the rear.
Setting the low-pass frequency
Set the low pass frequency switch on the top of the MLQ-750 to either 60Hz or 90Hz
depending on the subwoofer and subwoofer amplier requirements.
Connecting an MP3 player or video unit
1. Plug the MP3 player or video unit into the auxiliary RCA input on the back of the
MLQ-750 unit.
2. Make sure the auxiliary button on the front of the unit is out, ready to receive input
from the main RCA input (not the auxiliary RCA input).
3. Turn the MLQ-750 master volume to a normal listening level.
4. Press the play button on the auxiliary source.
5. Push in the AUX button to change to the auxiliary source.
6. Using a small athead screwdriver, adjust the AUX gain controls located on the
top of the unit so that the volume of the auxiliary source matches the volume of
the main source.
3
Care and Maintenance
• Cleaning the Cabinet
Use a soft, dry cloth to gently wipe dust and dirt from the unit.
Do not use benzene, thinner, car cleaner, or other cleaners. These substances
may damage the unit or cause the paint to peel.
• Servicing the equalizer/crossover unit
In the event that trouble arises, never open the case or disassemble the unit. The
internal parts are not serviceable by the user. Opening any components will void
the warranty.
CAUTION!
Changes or modications to this product that are not approved by
the manufacturer will void the warranty and will violate FCC approval.
4. INSTALLATION AND WIRING
Read these instructions and the following precautions carefully.
What is included in the box
In addition to this manual, the box contains:
MLQ-750 7-band graphic equalizer
2 mounting brackets
8 phillips-head screws
Before starting
Mounting precautions
The MLQ-750 can be mounted next to the source unit or under the dash using the
mounting brackets. The front panel controls should be easily accessible from the
driver’s seat. In addition:
This unit requires additional mobile audio components for proper operation. Always
use great care when attaching anything to a vehicle! Check clearances in front of,
behind, and on both sides of the planned installation before drilling any holes or
installing any screws.
Wiring precautions
Disconnect the ground (-) terminal on the vehicle’s battery.
WARNING!
To prevent short circuits during installation, always disconnect
the vehicle’s negative(-) battery lead before making any connections.
4
This unit is exclusively for vehicles with a negative ground, 12V battery system.
A good chassis ground connection is critical to minimize resistance and avoid noise
problems. Use the shortest wire possible and securely connect it to the car chassis
and the source unit ground.
When routing RCA cables, keep the cables away from the power cables and output
speaker wires.
If you are using a source unit without a remote turn-on lead, the MLQ-750 can be
turned on with a switched accessory lead. This accessory power source is located
in the factory harness at the back of the radio. This lead turns on and off with the
ignition key.
Do not open the case. There are no user-serviceable parts inside. If you require
assistance, consult your Mc Laren Sound Systems dealer or an authorized Mc Laren
Sound Systems service center.
5
5. SPECIFICATIONS
Note
The technical data and the design of the equipment may change
without prior notice for the sake of technical improvements .
Graphic center frequencies: 50 HZ , 125 HZ , 315 HZ , 750 HZ , 2.2 HZ ,
6 KHZ , 16 KHZ
Boost/cut: 12d B
S/N ratio: 100d B
Frequency response: 10Hz-50kHz +/- 1d B
Maximum output voltage: 7 v
THD: 0.005%
Input sensitivity: 50mv-3v
Head room: 20d B
Input impedance: 20kOhms
Output impedance: 2kOhms
Stereo separation: 82d B/1kHZ
Operating voltage: 11V-15V negative ground
Size: 7” wide by 4 1/8” deep by 1”high
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