Harman JBL Marine A754 Manual De Propietario página 5

SPECIFICATIONS
Marine A754
Power output @
75 watts RMS x 4
4 ohms (14.4V)
Power output @
55 watts RMS x 4
4 ohms (12V)
Power output @
100 watts RMS x 4
2 ohms (14.4V)
Power output @
80 watts RMS x 4
2 ohms (12V)
Power output in 200 watts RMS x
bridged mode (14.4V) 2 at 4 ohms
Power output in 160 watts RMS x
bridged mode (12V) 2 at 4 ohms
Frequency response 10-40 KHz
32-320 Hz variable,
Crossover frequencies
12 dB/octave
Line-level input 200 mVrms –
sensitivity
High-level input
1 – 22 Vrms
sensitivity
Signal-to-noise ratio
THD+N @ rated power
Fuse rating
12-5/8" x 2-1/16" x
Dimensions
7-1/8" (320mm x
(W x H x D)
51.3mm x 180mm)
Weight
Recommended wire
gauge
Maximum operation
temperature
Marine A5055
50 watts RMS x 4,
320 watts x 1
40 watts RMS x 4,
255 watts x 1
75 watts RMS x 4,
500 watts x 1
65 watts RMS x 4,
390 watts x 1
150 watts RMS x
2 at 4 ohms
130 watts RMS x
2 at 4 ohms
10-40 KHz/
25-320 Hz
32-320 Hz variable
high- and low-pass
(front and rear);
32-320 Hz low-
pass (subwoofer);
12 dB/octave
200 mVrms –
4 Vrms 4 Vrms
1 – 22 Vrms
>80 dB >80 dB
<1% <1%
30 A x 2 30 A x 3
14-3/16" x 2-1/16" x
7-1/8" (360mm x
51.3mm x 180mm)
3.08 kg 3.98 kg
8 4
45°C 45°C
TROUBLESHOOTING
No audio and POWER INDICATOR is off.
• No voltage at BATT+ and/or REM terminals, or bad or no
ground connection. Check voltages at amplifier terminals with
VOM.
No audio and PROTECT INDICATOR flashes every
4 seconds.
• DC voltage on amplifier output. Amplifier may need service; see
enclosed warranty card for service information.
No audio and PROTECT and POWER INDICATORS flash.
• Voltage less than 9V on BATT+ connection. Check boat
charging system.
No audio and PROTECT INDICATOR is on.
• Amplifier is overheated. Make sure amplifier cooling is not
blocked at mounting location. Or, there may be voltage greater
than 16V (or less than 8.5V) on BATT+ connection. Check boat
charging system.
Amplifier fuse keeps blowing.
• The wiring is connected incorrectly or there is a short circuit.
Check wiring connections.
Distorted audio.
• Gain is not set properly. Check setting. Check wires for shorts
or grounds. Amplifier or source unit may be defective.
Distorted audio and PROTECT INDICATOR flashes.
• Short circuit in speaker or wire. Remove speaker leads one at
a time to locate shorted speaker or wire, and repair.
Music lacks dynamics or "punch".
• Speakers are not connected properly. Check speaker
connections for proper polarity.
Engine noise—whining or clicking—in system when the
engine is on.
• Amplifier is picking up alternator noise. First, check ground
connection on the amplifier – a loose or improper ground is
one of the main causes for noise. Turn down gain. Move RCA
audio cables away from power wires. Installing an alternator
noise filter on power line between battery and alternator might
also be necessary.
EN