The Down4Sound JP104 (JP 10.4) is a monster Class D 4-channel amplifier built for extreme output with full crossover control. With dual 0-gauge power/ground inputs, Tiffany RCA connections, and an included bass knob, it’s engineered for high-performance multi-speaker systems.

Power Ratings (RMS)

• 1300W x 4 @ 2 OHM
• 1000W x 4 @ 4 OHM
• 3300W bridged @ 4 OHM

Tuning & Specs

• Frequency Response: 10Hz – 21KHz
• High Pass: 20Hz – 800Hz (x1), 200Hz – 8KHz (x10)
• Low Pass: 50Hz – 800Hz (x1), 500Hz – 8KHz (x10)
• Input Sensitivity: 6V – 0.2V
• Signal-to-Noise Ratio: 90dB
• THD @ 4 OHM: 0.1%
• Fuse Rating: 550A total
• Working Voltage: 9V – 15.5V

Connections & Dimensions

• Dual 0-gauge power and ground inputs
• Speaker outputs support up to 4-gauge
• Dimensions: 19.68 inch × 9.37 inch × 2.71 inch
• Made in South Korea

Electrical upgrade required for warranty: Big 3, upgraded alternator, and reserve battery capacity are required for reliable high-output performance.