Down4Sound JP43 v2 | 4300 WATT RMS Class D Amplifier

Down4Sound JP43 V2 Green 4300W RMS Monoblock Amplifier

The Down4Sound JP43 V2 Green 4300W RMS monoblock amplifier is engineered for powerful, controlled subwoofer performance. The V2 design adds a stronger power supply, thicker end plates, an aluminum wired bass knob, and built-in clip input and clip output detection while retaining the high-output performance that made the original JP43 a favorite for serious bass systems.

What Changed from the JP43 V1 to the JP43 V2?

• Stronger Power Supply: The V2 features an upgraded power supply for improved power delivery and stability.
• Thicker End Plates: The V2 features thicker end plates for increased strength and durability.
• Wired Bass Knob: The V2 includes a wired bass knob with voltage, temperature, and clipping information.
• Clip Input and Clip Output Detection: Clip input and clip output detection have been added directly to the amplifier.

Built for High-Power Subwoofer Systems

The JP43 V2 delivers up to 4300 watts RMS at 1 ohm, giving high-performance subwoofer systems the power needed to produce deep, forceful bass. Dual power and ground inputs help support the current demands of the amplifier, while its Korean-built design provides reliable output for daily systems and demanding high-power applications.

Enhanced Features for Maximum Performance

• Dual Power and Ground Inputs: Dual 0-gauge power and ground inputs help provide the current capacity required for stable high-power operation.
• High-Quality RCA Connections: True Tiffany-style RCA connectors provide a secure connection and excellent signal integrity.
• Active Cooling: The internal cooling fan activates when the amplifier powers on to help manage temperature during demanding use.
• Strappable Design: Two matching JP43 V2 amplifiers can be strapped together for applications requiring additional output.
• Advanced System Monitoring: The included aluminum wired bass knob displays voltage, temperature, and clipping information.

JP43 V2 Power Ratings

Tested at 14.4V and 1% THD:

• 1 Ohm: 4300W RMS
• 2 Ohms: 2300W RMS
• 4 Ohms: 1300W RMS

JP43 V2 Specifications

• Amplifier Type: Monoblock Class D
• Operating Voltage: 12V to 15.6V
• Frequency Response: 14 Hz–260 Hz
• Signal-to-Noise Ratio: 89 dB
• Damping Factor: <400
• Input Sensitivity: 6V–0.2V
• Subsonic Filter: 10 Hz–50 Hz
• Low-Pass Filter: 35 Hz–250 Hz
• Phase Control: 0–180 degrees
• Strappable Connection: Yes, with a matching JP43 V2 amplifier
• Minimum Speaker Impedance: Stable at 0.5 ohm with a properly upgraded electrical system
• Recommended Fusing: 400A total, 200A for each positive power input
• Clip Input Detection: Yes
• Clip Output Detection: Yes
• Bass Control: Aluminum wired bass knob with voltage, temperature, and clipping information
• Speaker Outputs: 4-gauge
• Power Inputs: Dual 0-gauge
• Dimensions: 15.75" L x 9.37" W x 2.64" H
• Country of Origin: Made in South Korea

The Down4Sound JP43 V2 Green 4300W RMS monoblock amplifier combines serious output with improved power delivery, thicker end plates, advanced system monitoring, active cooling, and onboard clipping detection. Whether it is powering a high-output daily system or a demanding bass build, the JP43 V2 provides the power and control needed to bring your subwoofers to life.

Electrical Upgrade Notice

When wiring the amplifier at lower impedances or playing extreme low-frequency bass, upgrading the vehicle’s electrical system is strongly recommended for stable performance. Recommended upgrades include:

• The Big 3 wiring upgrade
• Upgraded alternator
• Adequate reserve battery capacity