BLAM RELAX RA 754D User manual
USER MANUAL
NOTICE D’UTILISATION
MADE IN FRANCE
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 /15 V
• RMS Power (4 Ω): 4 × 50 Watts RMS
• RMS Power (2 Ω): 4 × 75 Watts RMS
• Bridged Power (4 Ω): 2 × 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 (L x W x H) : 188 × 91.4 × 36 mm – 7.4’’ × 3.6’’× 1.4’’
Recommended Fuse rating: 25 A.
GB
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POWER CONNECTIONS
Connect an empty fuse holder within 18’’ (45cm) 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’’ (1m) 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.
GB
LOW LEVEL INPUT WIRING
Low-level (RCA) input wiring is preferred for best audio performance.
Always use a high-quality cable.
NOTE: do not connect BOTH the high level and low-level inputs from
your receiver to your amplifier at the same time!
4
HIGH LEVEL INPUT WIRING
The high-level input(s) should only be use if the RCA output are
not present, connect the speaker outputs from the receiver to
the high-level input connector of the amplifier. Be sure to observe
polarity to avoid audio phase problems.
NOTE: do not connect BOTH the high-level signal and low-level inputs
from your receiver to your amplifier at the same time!
5
GB
2-4 OHM SPEAKERS WIRING CONFIGURATION
4 OHM BRIDGED SPEAKERS WIRING CONFIGURATION
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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 fuse(s), 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.
• Check 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.
• Check 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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MISE EN GARDE
Merci d’utiliser l’amplificateur BLAM RA754D. Afin de garantir
les meilleures performances de votre amplificateur, nous
vous recommandons de lire ce manuel avant d’utiliser
l’amplificateur.
CARACTÉRISTIQUES TECHNIQUES
Compatible avec les autoradios d’origine
• Mise en route automatique
• Entrées RCA compatible bas niveau et haut-niveau : 0,5 V /15 V
• Puissance (4 Ω) : 4 × 50 Watts RMS
• Puissance (2 Ω) : 4 × 75 Watts RMS
• Puissance bridge (4 Ω) : 2 × 150 Watts RMS
• Filtre passe-bas : 120 Hz
• Filtre passe-haut : 100 Hz
• Rapport signal/bruit : > 90 dB
• Protections : court-circuit / impédance basse / inversion de polarité /
protection thermique
• Dimensions (L x l x H) : 188 × 91,4 × 36 mm – 7,4’’ × 3,6’’× 1,4’’
Fusible recommendé : 25 A.
F
8
CONNEXION DE L’ALIMENTATION
Connecter un câble de 8mm² minimum avec un porte-fusible
placé à moins de 45 cm de la batterie de la voiture et reliez-le à la
connexion ‘’+12V’’.
Connecter la masse (-) au châssis du véhicule au point le plus
proche. Garder ce fil de masse d’une longueur inférieur à un mètre.
S’assurer que la surface de contact est exempte de peinture et
de rouille afin que la connexion entre la cosse et le châssis soit
efficace.
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AUTORADIO
MASSE
BATTERIE
F
CÂBLAGE DES ENTRÉES BAS NIVEAU
Les entrées bas niveau (RCA) sont préférables pour de meilleures
performances audios, si votre autoradio est équipé de sorties RCA.
Il est recommandé d’utiliser un câble de bonne qualité.
REMARQUES : Ne connectez jamais les entrées haut niveau et bas
niveau en même temps.
.
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AUTORADIO
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