20-Pin Audio Amplifier Module Board Wire Harness Connector – Male & Female OEM

This 20-pin connector is used in automotive premium audio amplifier module harnesses. Factory-fitted premium audio systems — including Bose, Harman Kardon, JBL, Bang & Olufsen, and Burmester — use a dedicated amplifier module that requires a high-density connector to carry all audio input, output, power, and control circuits. The 20-pin configuration integrates audio input signals, speaker output circuits, power supply, ground, and CAN bus control circuits. Available in Male and Female variants, bare or with 15cm pre-wired leads.

Key Specifications

• Pin count: 20-pin
• Gender options: Male / Female
• Housing material: Nylon (PA66)
• Available as: Bare connector or 15cm pre-wired leads
• Application: Premium audio amplifier module harness

20-Pin Amplifier Circuit Breakdown

• Pins 1–4: Audio input signals from head unit (front L/R, rear L/R — pre-amplified RCA-level signals)
• Pins 5–6: Subwoofer input signal (L/R)
• Pins 7–10: Front speaker output (Left +/−, Right +/− — amplified output to speakers)
• Pins 11–14: Rear speaker output (Left +/−, Right +/−)
• Pins 15–16: Subwoofer output (+/−)
• Pin 17: Amplifier power supply (12V, ignition-switched)
• Pin 18: Amplifier constant power (battery backup)
• Pin 19: Ground (chassis earth)
• Pin 20: CAN bus or remote turn-on signal (amplifier enable)

Common Fault Symptoms

• No audio from all speakers (amplifier power/ground pins corroded)
• Audio from some speakers but not others (individual output pins corroded)
• Distorted audio or crackling (high-resistance contact on audio signal pins)
• Amplifier not turning on (remote turn-on or CAN bus pin affected)
• Subwoofer not working (subwoofer output pins corroded)

Frequently Asked Questions

Q: My premium audio system has no bass but other speakers work — is this the connector?
A: Yes. Corroded subwoofer output pins (pins 15–16) cause subwoofer failure while other speakers continue to work. This is a common symptom of partial connector corrosion on amplifier module connectors, especially in vehicles where the amplifier is mounted in the boot (trunk) area where moisture can accumulate.

Q: Can I use this connector for an aftermarket amplifier installation?
A: Yes. The 20-pin pre-wired version is commonly used for aftermarket amplifier installations where the installer needs to extend or repair the factory harness before connecting to an aftermarket amplifier.

Q: Are terminals included?
A: Yes, terminals are included with all variants.