The Down4Sound JP8 is an 800W+ RMS monoblock amplifier built for daily drivers, demo vehicles, and anyone who wants strong, clean bass from a compact footprint. Designed from the ground up with real-world car audio in mind, the JP8 blends old-school styling with modern Class D efficiency and control.

Independent third-party testing has confirmed that the JP8 delivers serious power at 4 OHM, 2 OHM, and 1 OHM, making it a flexible option for a wide range of subwoofer setups. A built-in cooling fan, solid internal components, and a plexi back plate all come together to create an amplifier that not only performs, but also looks the part in show builds.

Power Ratings (Manufacturer Worst-Case)

• 1 OHM: 700W x 1 @ 12V | 850W x 1 @ 14.4V
• 2 OHM: 500W x 1 @ 12V | 650W x 1 @ 14.4V
• 4 OHM: 490W x 1 @ 12V
• 2 OHM Linked: 2300W x 1 @ 14.4V

Verified Dyno Results (Approximate)

• 4 OHM: 511W RMS @ 14.4V
• 2 OHM: 892W RMS @ 14.4V
• 1 OHM: 1256W RMS @ 14.4V

Tuning & Controls

• Frequency Response: 10Hz – 270Hz
• Low Pass Filter: 35Hz – 250Hz
• Subsonic Filter: 10Hz – 50Hz
• Bass Boost: 0–9dB
• Input Sensitivity: 6V – 0.2V
• Signal-to-Noise Ratio: 97dB
• THD @ 4 OHM: <0.1%

Electrical & Build Details

• Single Unit Fuse Rating: 120A
• Strapped Fuse Rating: 220A
• Operating Voltage: 9V – 16V
• Damping Factor: 100
• Class: D Digital
• Power & Ground Inputs: 4 GA
• Speaker Outputs: up to 12 GA
• Dimensions (L x W x H): 11.81 x 7.4 x 2.24 inches

If you are looking for a compact amp that still hits hard, the Down4Sound JP8 delivers strong RMS power, flexible wiring options, and clean, controlled bass for your car audio system.