MB QUART RAl-150.2 Amplifier Installation Guide
- June 4, 2024
- MB QUART
Table of Contents
Quick Start
Installation Guide 
R-150.2 RAl-280.4
RAl-300.1
R-750.1 RAl-710.5
Before you start
CAUTION
Many new and factory radios require a reset code when disconnected from
battery power. This is an anti-theft feature. Before unplugging the power, you
must determine if your radio/source unit requires a reset code. Check the
operation manual for your vehicle or contact the dealer.
Congratulations on your choice of an MBQuart amplifier. This “Quick Start
Installation” guide is meant to help you “hook up” and play music. For more
detailed information, on system settings, speaker and subwoofer configuration,
and full specifications by model please visit our website at www.MBQuart.com
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.
| Model | Fuse Size | Cable Size |
|---|---|---|
| RA1-150.2 | 20a External | 4ga |
| RA1-280.4 | 40a External | |
| RA1-300.1 | 40a External | |
| RA1-750.1 | 80a External | |
| RA1-710.5 | 80a External |
Power cable size and fuse size based on a 17ft power (B+) (OFC) cable length
and 18-inch ground (OFC) oxygen-free cable.
For any other lengths used please consult a certified professional installer.
Installation
-
Disconnect Negative Battery Terminal
Place the 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.
-
Lavel control
Turn the LEVEL control completely counter-clockwise to minimum. -
Positive Battery Connection
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. -
Re-connect negative Battery Terminal
Re-connect the negative battery terminal making sure it is securely tightened.
-
Common System Setup
2ch-Full Range
4ch-Full RangeSet
INPUT MODE switch to 4CH.
Set CH3&4 LOW PASS MODE.
4ch-Mixed Mono
Set INPUT MODE switch to 4CH.
Set CH3&4 LOW PASS MODE.
Mono
5ch
Set INPUT MODE to SCH.
Set CH1 &2 and CH3&4 CROSSOVER switch to HP.C
Setup
Open Control Panel
To gain access to the RA 1 amplifier series top mount setting control panel
carefully remove the four screws and lift the face 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.
Settinge
The illustrations below describe the various controls. Refer to the illustration that matches your amplifier.
-
LEVEL Adjustment
The level control purpose is to match the output of your source signal to the amplifier. Refer to the section C for detailed instructions. -
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.
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!
- If possible, with the source unit off, confirm that the primary volume control is turned down (counter clockwise).
- Turn on the source unit (CD, or MP3 player). Re-confirm that the volume is turned down. Make sure the source unit controls; balance, fader, bass and treble are all set to center or “O” adjustment. Make sure that the green LED on the end of the amplifier is illuminated.
- Play a clean musical selection of which you are very familiar. CD is preferred. Do not use radio signals for level setting. Hit play and start turning the volume of the source unit up.
- Stop increasing the source unit volume when you reach 3/4 (about 75%) or until you hear speakers begin to slightly start producing distortion.
- Increase the amplifier gain (clockwise) until distortion is heard, then back the level down (counter clockwise) until the distortion is eliminated. 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.
Turu 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 re-read this
document or hire a professional installer.
**MUSIC DEFINED**
WARRANTY
Maxxsonics USA Inc. warrants this product, to the original consumer purchaser,
to be free from defects in material and workmanship for a period of one (1)
year from the date of purchase. Maxxsonics USA Inc. will, at it’s discretion,
repair or replace defective products during the warranty period. Components
that prove to be defective in materials and workmanship under proper
installation and use must be returned to the original authorized Maxxsonics
USA Inc. retailer from where it was purchased. A photocopy of the original
receipt must accompany the product being returned. The costs associated with
removal, re-installation and freight are not the responsibility of Maxxsonics
USA Inc. This warranty is limited to defective parts and specifically excludes
any incidental or consequential damages connected therewith. To view the full
warranty, please visit the website.
MBQuart products are designed and engineered in the USA by
MAXXSDNICg
www.maxxsonlcs.com
MBQ RA1 QSG 01 – rev1
BO2820
Reference RAl-150.2
150 Watt 2-Channel Amplifier
Model l-Ohm
2-0hm 4-0hm
Mono Bridged@ 4-0hms
Frequency Response
Signal to Noise Ratio
THO%
Variable Hi-Pass
Bass Boost
Specifications Subject To Change Without Notice
WARNING: Cancer and Reproductive Harm –
www.P65Warnings.ca.gov
ADVERTENCIA: Cancer y Daiio Reproductive –
www.P65Warnings.ca.gov
AVERTISSEMENT: Cancer et Troubles de l’appareil reproducteur –
www.P65Warnings.ca.gov