This document is an owner's manual for a series of digital monoblock amplifiers: JP33, JP43, JP63, and JP83. It provides detailed information on their features, specifications, power connections, speaker connections, input connections, strappable configurations, Bluetooth remote control operation, and troubleshooting.

Function Description

These are strappable digital monoblock amplifiers designed for car audio systems, capable of stable operation into a 1-ohm mono load. They feature a high-speed MOSFET power supply and various adjustable filters and boosts to optimize audio output. The amplifiers are equipped with a Bluetooth remote control for convenient adjustments and monitoring.

Important Technical Specifications

The manual provides a comprehensive table of specifications for each model:

Rated Power Output:

JP33: 3300W x 1 (1ohm), 2300W x 1 (2ohms), 1200W x 1 (4ohms)
JP43: 4300W x 1 (1ohm), 2300W x 1 (2ohms), 1300W x 1 (4ohms)
JP63: 6300W x 1 (1ohm), 4300W x 1 (2ohms), 2300W x 1 (4ohms)
JP83: 8300W x 1 (1ohm), 6300W x 1 (2ohms), 3300W x 1 (4ohms)

RMS Power (Linked):

JP33: 7000W x 1 (2ohm Linked)
JP43: 9000W x 1 (2ohm Linked)
JP63: 13500W x 1 (2ohm Linked)
JP83: 20000W x 1 (2ohm Linked)

Frequency Response:

JP33, JP43: 14Hz - 260Hz
JP63: 14Hz - 269Hz
JP83: 14Hz - 271Hz

Filters:

Low Pass Filter: 35Hz - 250Hz (all models)
Subsonic Filter: 10Hz - 50Hz (all models)

Other Key Specifications:

Phase: 0° - 180° (all models)
Input Sensitivity: 6V - 0.2V (all models)
Signal to Noise Ratio: 96dB < (JP33), 89dB < (JP43), 91dB < (JP63), 92dB < (JP83)
T.H.D @ 4ohm: less than 0.1% (all models)
Working Voltage: 9V - 16V (all models)
Single Unit Fuse Rating: 350A (JP33), 400A (JP43), 700A (JP63), 900A (JP83)
Strapped Fuse Rating: 700A (JP33), 8400A (JP43), 1400A (JP63), 1800A (JP83)

Physical Dimensions (Width x Height for all models): 9.37 x 2.64 inches

Length: 13.78 inches (JP33), 15.75 inches (JP43), 19.68 inches (JP63), 23.62 inches (JP83)

Usage Features

Strappable Digital Monoblock Amplifier: Allows for linking two amplifiers for increased power output, with the MASTER amplifier having total control over the SLAVE amplifier. Minimum working impedance in strappable connection is 2 ohms.
Stable into 1ohm Mono Load: Designed for robust performance with low impedance loads.
High Speed MOSFET Power Supply: Ensures efficient and reliable power delivery.
Variable Low Pass Filter, Subsonic Filter, and Bass Boost: Provides extensive control over audio output to tailor sound to specific preferences and speaker requirements.
4-Way Protection Circuits: Includes thermal, high & low voltage, speaker short, and DC protection to safeguard the amplifier and connected components.
Bluetooth Remote Control: Features a remote bass knob with a voltmeter, amplifier temperature display, and clipping indicator. This allows for convenient adjustments and monitoring from a distance. The remote control has a 7-segment LED display for Volt / °F / °C / Volume Level, a switch to change display modes, a CLIP indicator that blinks when THD is over 3%, a PAIR (GREEN) LED for Bluetooth connection status, and a potentiometer for remote and amplifier turn on/off and level adjustment (0 to 100). It supports Sleep mode (default, 10-second display then sleep) and All mode (always on display).
High Purity Copper Printed Circuit Board: Contributes to reliable performance and signal integrity.
0 Gauge Power / Ground Terminals: Accommodates heavy gauge wiring for optimal power flow.
Power Connections: JP33 and JP43 have two power and ground inputs, while JP63 and JP83 have three. Users must install an in-line fuse holder (approximately 11-16 inches from the positive battery terminal) as the amplifiers are not supplied with internal fuses.
Ground Connection: Recommended to connect the GND terminal to the car's chassis, keeping the cable as short as possible (not longer than 20 inches) and ensuring a rust-free connection. For high-power amplifiers, connecting ground to the negative battery terminal is advised.
Remote Turn-On (REM): Connects to the power antenna terminal or dedicated remote turn-on using 12 or 16 gauge electrical wire. In a linked setup, the SLAVE REM should be connected from the MASTER REM for the Bluetooth bass knob remote turn on/off feature.

Maintenance Features

Troubleshooting Guide: The manual includes sections for diagnosing common issues such as "NO OUTPUT," "AMPLIFIER SHUT DOWN (PROTECTION)," "DISTORTION & NOISE," and "POOR BASS RESPONSE."
- No Output: Check remote turn-on voltage, fuses, and RCA input connections.
- Amplifier Shut Down: Verify power, ground, and remote wire connections. Check for DC voltage at RCA input (remove RCA cable if present). Ensure adequate ventilation to prevent thermal shutdown. Confirm minimum working impedance (1 ohm for single unit, 2 ohms for strappable) and operating voltage (9V-16V). Ensure chassis and remote use the same ground.
- Distortion & Noise: Readjust input gain level, ensure good ground connections for amplifier and headunit, use shielded RCA interconnects, and check all other audio equipment ground connections.
- Poor Bass Response: Check speaker wiring and polarity.
Protection Features: The amplifiers incorporate state-of-the-art protection against excessive heat, short-circuited speakers, DC voltage, and high/low voltage conditions. The protection indicator will light up, and the system will shut down if an issue is detected.
Cooling: If the amplifier overheats, it will shut down and resume operation once it cools. Installing the amplifier with better ventilation is recommended.

Down4Sound JP33 - Page 5

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