BLAM Relax RA 754D User Manual

BLAM Relax RA 754D User Manual

CAUTION

Thank you for using the BLAM RA 754D amplifier, to ensure the best performance from your amplifier, please read the
Operating Manual before using the amplifier.

TECHNICAL FEATURE

Compatible with OEM head units

•  Auto-turn on
• RCA low level and high-level inputs: 0.5 V /75 V
• RMS Power 14 n): 4 x 50 Watts RMS
• RMS Power 12 n) 4 x 75 Watts RMS
• Bridged Power 14 n) 2 x 150 Watts RMS
•  Low pass crossover : 120 Hz
• High pass crossover: 100 Hz
• Signal/noise ratio:, 90 dB
• Protections: short circuit/ low impedance/ reversal polarity/ heat protection
• Dimensions IL x W x H): 188 x 91.4 x 36 mm – 7.4″ x 3.6″x 1.4″ Recommended Fuse rating: 25 A.

INTERNATIONAL GUARANTEE

Conditions of guarantee

All BLAM loudspeakers are covered by guarantee drawn up by the official BLAM distributor in your country. Your distributor can provideall details concerning the conditions of guarantee. Guarantee cover
extends at least to that granted by the legal guarantee in force in the country where the original purchase invoice was issued.

POWER CONNECTIONS

RRConnect

an empty fuse holder within 18″ l45cml of the car battery and run 8 gauges cable from this fuse to the amplifier location.
Then connect the fuse holder to the battery+ 12 Volts. Connect the ground terminal to the closest point on the chassis of the vehicle. Keep this ground wire to less than 39″ 11ml in length
Ensure that the contact surface is free of paint or rust so that the connection between the terminal and the chassis is effective.

LOW LEVEL INPUT WIRING

Low-level !RCA) input wiring is preferred for best audio performance Always use a high-quality coble.
NOTE: do not connect BOTH the high level and low-level inputs from your receiver to your amplifier at the some time!

2-4 OHM SPEAKERS WIRING CONFIGURATION

4 OHM BRIDGED SPEAKERS WIRING CONFIGURATION

TROUBLE SHOOTING

This amplifier has multi-layer protection features to prevent damage from misuse or faulty conditions to ensure long lasting life of your investment.
If the unit senses excessive heat, short circuited speakers, overload, or voltage fluctuation outside of the working range the protection indicator light will turn red and the unit will turn off. In order to solve this problem, you should turn all levels down, power off the unit, then carefully check
the installation for wiring mistakes or shorts. If the amplifier is excessively warm the protection light will not turn on as the unit will turn off to protect itself from overheating Let the unit cool down for 30 minutes and try again. If the unit work, try moving the amplifier or make sure nothing is
covering it so it can vent heat off of the heatsink. Before you remove or uninstall the amplifier, refer to the list below for suggested solutions. Amplifier doesn’t turn on or not output:

• Check the fuseisl. not just visually, but with a continuity meter and all 12+ volt and ground connection. Make sure you have 13+ volts. It is possible for a fuse to have poor internal connections. take the fuse out of the holder for the testing.
•  Check the input signal from the source unit using an AC voltmeter to measure the voltage while it’s being played. The voltage should be from 0.5 to 15 volts from the RCA cables.
• Check the output of the amplifier, test for output at the speaker output of the amplifier
• heck to ensure that the speaker wires are making a good connection to the amplifier and the subwoofers. Amplifier goes into protection:
• Check shorts on speaker wires or open coil.
• Check input voltage from RCA, if DC signal is over 4 volts. the amplifier will go into protection
•  Remove and reset the power of the unit to check if it will turn on.
• Check impedance to make sure it’s over the minimum load. Have a working impedance of 2 Ohms strapped.
•  Check input voltage. BLAM RA754D have a working range of 10 to 16 volts.
• Check the chassis ground connections. Distorted / Attenuated / Noise sound:
• Check the chassis – ground connection of all audio equipment
• Check amplifier controls for errors. input level or crossover setting.
• heck the speaker wires for a possible short, either between the positive and negative leads or between a speaker lead and the vehicle’s chassis ground.
• Check the nominal load impedance to verify that the amplifier is driving a load equal or greater than 2 Ohms.
• Check the input signal cables to make sure signal is present at the amplifier inputs and the cables are not pinched or loose. It may be helpful to try a different set of cables/ or a different signal source to be sure.
•  Check speaker wiring for reverse polarity.

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