MB QUART RAl-150.2 Channel Amplifier Installation Guide

June 5, 2024
MB QUART

MB QUART RAl 150.2 Channel Amplifier

MB QUART RAl-150.2 Channel Amplifier PRODUCT

CAUTION
Many new and factory radios require a reset code when disconnected from battery power. This is an anti-theft feature. Before unplugging power, you must determine if your radio/source unit requires a reset code. Check the operation manual for your vehicle or contact the dealer.

Power cable size

It is critical to use the proper power and ground cable. Select the size listed here for your amplifier model. Always use high quality copper cable.

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Power cable size and fuse size based on a 17ft power (B+) (OFC) cable length and 18-inch ground (OFC) oxygen free cable. Anv other lenaths used please consult a certified professional installer.

Installation

Disconnect Negative Battery Terminal

Place terminal in a secure position so that it won’t accidentally contact the negative battery post.

Run Cables

Properly route power, speaker and RCA cables through the vehicle.

Mount Amplifier

Choose a mounting location that will provide adequate air ventilation. Mount the amplifier to a secure surface. Do not mount the amplifier upside down.

Chassis Ground

The chassis ground connection is critical to the performance of the amplifier. Choose a location that is close to the amplifier. Completely scrape away the paint and use a nut and bolt if possible. DO NOT USE AN EXISTING FACTORY BOLT.

Negative Power

Connection Attach the chassis ground cable to the amplifier negative terminal. It is important to make sure this connection is very tight.

Remote Turn on Connection

Attach the remote turn on wire to the amplifier remote output of the source unit.

Positive Power Connection

Attach the main power cable to the amplifier+12V. The cable must run directly to the battery and be properly fused and be very tight.

Signal Input Connection

Connect the RCA cables to the INPUT connectors.

Level Control

Turn the LEVEL control completely counter-clockwise to minimum.

Positive Battery Connection

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Connect the power cable to the positive battery terminal. The power cable must be fused within 18 inches of the battery terminal. Be prepared to disarm your vehicle’s alarm and to enter your radio/ source unit code.

Reconnect Negative Battery Terminal

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Reconnect the negative battery terminal making sure it is securely tightened.

Common System Setup

2ch Full Range

CROSSOVER MODE

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4ch Full Range

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Set INPUT MODE switch to 4C. Set CH3&4 LOW PASS MODE.

4ch Mixed

MonoSet INPUT MODE switch to 4CH. Set CH3&4 LOW PASS MODE.

Mono
5 ch

Setup

To gain access to the RA1 amplifier series top mount setting.

Open control panel

Open Controlthe four screws and lift the face Panel plate up. When you’re finished with the control panel mindfully put the face plate back together with the four screws. Make sure not to over tighten.

Settings
LEVEL Adjustment

The level control purpose is to match the output of your source signal to the amplifier.

X OVER Switch

This switch will set the amplifier to have a full frequency output or to filter out high or low frequencies.

Frequencies Adjustment

The Low Pass Filter will cut off the frequencies above the setting. The High Pass Filter will cut off the frequencies below the setting.

SUBSONIC SWitch

The Subsonic Switch will cut off the frequencies below the setting.

BASS BOOST

A The Bass EQ control will increase the power output at 45Hz for more pronounced bass. Exercise caution when using this control. Increase the level in small amounts until distortion is noticed, then back off a little.

RA1-300.1 / RA1-750.1

RA1-300.1 / RA1-750.1

RA 1-280.4

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RA1-710.5

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LEVEL SETTING

This is a critical step to insure your amplifier is properly adjusted to match the signal output level of your source unit.

THIS IS NOT A VOLUME CONTROL

  1. If possible, with the source unit off, confirm that the primary volume control is turned down (counter clockwise).
  2. Turn on the source unit CD, or MP3 player.
  3. Reconfirm that the volume is turned down.
  4. Make sure the source unit controls; balance, fader, bass and treble are all set to center or O adjustment.
  5. Make sure that the green LED on the end of the amplifier is illuminated.
  6. Play a clean musical selection of which you are very familiar. CD is preferred.
  7. Do not use radio signals for level setting. Hit play and start turning the volume of the source unit up.
  8. Stop increasing the source unit volume when you reach 3/4 about 75% or until you hear speakers begin to slightly start producing distortion.
  9. Increase the amplifier gain (clockwise) until distortion is heard, then back the level down counter clockwise until the distortion is eliminated.
  10. Small adjustments may need to be made to balance the levels of multiple amplifiers.

Remote Level Control

Some models include a bass remote. Avoid adjusting the bass remote while operating vehicle.

Turn on Mode

REM turn on SIGNAL SENSE ON, High level input DC turn on.

REM TURN ON/ DC SENSE ON SWITCH

There are two methods of switching the amplifier on and off. Select the appropriate position suited for your application.

REM TURN ON

This will turn on the amplifier when a +12v switched power typically from a source unit, is connected to the Amp Turn on. BLUE wire on the main power connection harness.

DC SENSE

The DC SENSE is for use with the source units that do not offer RCA outputs.

NOTE
If the RCA’s are plugged into the amplifier and the TURN ON MODE is in the DC ON position, the amplifier will NOT turn on. Please read this document or hire a professional installer.

References

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