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RE Audio BT900.4M

480W RMS 4-Channel BT Series Bluetooth Marine Amplifier

RE Audio
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• Built-in professional Bluetooth® signal processor module
• Corrosion-resistant ABYC compliant connectors
• Meets or exceeds ASTM d4329 (UV exposure)
• Full MOSFET DC-DC PWM power supply
• Bluetooth Range: Up to 30 feet (10m)
• Bluetooth audio and remote turn on signals can be passed to other amplifiers

Learn more about the bt9004m

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Product Highlights


• Built-in professional Bluetooth® signal processor module
• Corrosion-resistant ABYC compliant connectors
• Meets or exceeds ASTM d4329 (UV exposure)
• Full MOSFET DC-DC PWM power supply
• Bluetooth Range: Up to 30 feet (10m)
• Bluetooth audio and remote turn on signals can be passed to other amplifiers

Description


RE Audio brand icon

Authorized dealer

General Features:

  • BT Series 4-Channel Bluetooth Marine Amplifier
  • RMS Power Rating:
    • 4 ohm: 80 watts x 4 chan.
    • 2 ohm: 120 watts x 4 chan.
    • Bridged, 4 ohm: 230 watts x 2 chan.
  • Built-in professional Bluetooth® signal processor module
    • Works with most Bluetooth enabled devices
    • Bluetooth Range: Up to 30 feet (10m)
    • Intelligent switching between Bluetooth and RCA signal
    • Automatic Bluetooth on and off
    • Bluetooth antenna included
  • Accepts Bluetooth audio signal and RCA input
  • Intelligent switching between Bluetooth and RCA signal
  • Bluetooth audio and remote turn on signals can be passed to other amplifiers
  • Overload, short circuit, overheat and under voltage protection
  • 4 or 2 channel operation
  • Corrosion-resistant ABYC compliant connectors
  • Meets or exceeds ASTM d4329 (UV exposure)
  • SMD dedicated audio chip device
  • Full MOSFET DC-DC PWM power supply
  • ROHS compliant production technique
  • Variable high-pass filter: 50 - 500 Hz
  • Variable low-pass filter: 50 - 500 Hz
  • Input Level : 0.2 V ~ 5 V
  • Frequency Response: 10 - 3,500 Hz
  • Sampling Frequency: 44.1 KHz
  • Radio Frequency: 2.4GHz
  • Total Harmonic Distortion: < 0.1%
  • Signal to Noise Ratio: > 90dB
  • Channel Separation: > 60dB
  • Bluetooth Receiver Sensitivity: < -80dBm
  • 12 gauge OFC speaker wired recommended for installation
  • 4 - 8 gauge OFC power and ground wiring is recommended for installation
    • Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier
  • Dimensions: 7.4"W x 12.6"L x 2.2"H
  • NON-marinised version available: RE Audio BT900.4
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty


Check out the RE Audio BT900.4M Owner's Manual


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Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
80 watts x 4 channel
RMS Power @ 2 ohms
120 watts x 4 channel
Bridged RMS Power
230 watts x 2 channel
Amplifier Specifications
Number of Channels
4-Channel
Total RMS Power Output
480 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
<0.1%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Signal-to-Noise Ratio
>90 dB
Channel Separation
>60 dB
Remote bass/level controller
No
Amp Bluetooth Connectivity
Yes
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

BT900.4M

Weight:

11.00lbs

Internal SKU:

bt9004m

Internal Product ID:

92709

Product and How-to Videos


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.