JBL Marine Amplifiers

SKU: BLA-117390

Total RMS Power: 400W
Sale price$449.91 Regular price$499.90


New weather-resistant & high-performance JBL Marine amplifiers deliver impressive power from a compact chassis designed to withstand outdoor environments. Available with 4-channel and 5-channel outputs.

JBL Marine amplifiers incorporate our latest amplifier topology that includes selectable all-, high-, or low-pass crossovers with variable electronic frequency adjustment for precision system tuning. Engineered for harsh marine conditions, with power and performance to meet the needs of any outdoor audio system, JBL Marine amplifiers are the perfect match for all of your JBL marine products.


  • Compact size
  • High- and low-level inputs
  • Selectable output and variable
  • Adjustment crossovers
  • Product value
  • Cosmetic appeal
  • Conformal-coated PCB
  • Variable crossovers
  • Big dynamic power
BLA Code 117390 117392
Description MA704 MA4505
Total peak power 1000W 1800W
RMS power @ 4 ohms 70W x 4 45W x 4 320W x 1
RMS power @ 2 ohms 100W x 4 65W x 4 500W x 1
RMS bridged power @ 4 ohms 200W x 2 130W x 2
Frequency response 10Hz-40kHz 10Hz-40kHz (full range)
10Hz-320Hz (sub)
Maximum signal input 20V 20V
Maximum sensitivity 200mV 200mV
Line in signal-to-noise ratio (reference to 1 watt) ≥85dB Full:≥85dB
THD+N at rated power (@2k Hz-20k Hz) ≤1% ≤1%

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