JVC KS-DR2104DBT 4-Channel Compact Digital Amplifier featuring Bluetooth for Compact Car, Marine, UTV and Motorcycle / Max Power 600W / 50W RMS x 4 @ 4 ohms

Features:
IP67/IP66 Waterproof & Dustproof
ASTM B117 Rustproof
Vibration-proof
Increased Power Flow
High Quality Capacitors
Magnetic Shielding
Easy-to-Use Waterproof Bluetooth Remote Control
Qualcomm Bluetooth 5.0
Versatile Installation

Specifications
Audio unit
Max Power Output: 600W
Rated Power Output:
Stereo (4Ω) 50W x 4 (20Hz–20kHz, ≤1.0% THD)
Stereo (2Ω) 75W x 4 (1kHz, ≤1.0% THD)
Bridged (4Ω) 150W x 2 (1kHz, ≤1.0% THD)
Speaker Impedance: 4Ω (2Ω to 8Ω allowable)
(Bridged connection: 4Ω to 8Ω allowable)
Frequency response (+0, –3dB): 10Hz–20kHz
Signal to noise ratio: 89dB
Low pass filter frequency (–12dB/oct.): 50Hz–200Hz (variable)
High pass filter frequency (–12dB/oct.): 50Hz–200Hz (variable)
Preout: 5V (Max)

Bluetooth
Version Bluetooth: Ver.5.0
Frequency range: 2,402GHz–2,480GHz
RF output power (E.I.R.P.): +4 dBm (Max.), Power Class 2
Profile: A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile)

General
Operating voltage: 12V DC car battery
Current consumption: 26A
Operational temperature range: –10°C – 60°C
Dimensions (W × H × D): 7-13/16" x 1-15/16" x 4-1/8"
Weight: 1.6kg (3.5lbs)
Waterproof & Dustproof: IP66, IP67