Class-D Amplifier Anti-Pop Speaker Delay Module

Professional speaker delay module designed to eliminate turn-on and turn-off pops in audio amplifiers. The circuit delays speaker connection after power-up and instantly disconnects the speakers when power is removed, preventing unwanted transients from reaching your speakers.

Two power supply versions are available: 12 V DC and 24 V DC. Please select the required voltage version when ordering.

The module is fully compatible with Class D amplifiers based on TPA3116, TPA3255, and similar ICs, as well as most Class AB amplifiers.

Features

• Supply voltage: 12 V DC or 24 V DC
• Delayed speaker connection after power-up
• Instant speaker disconnection when power is removed

• Independent switching of all four speaker lines:

  • L+
  • L−
  • R+
  • R−

• Complete speaker isolation from the amplifier

• Compatible with BTL (Bridge-Tied Load) amplifiers

• Compatible with Class D amplifiers such as TPA3116, TPA3255 and similar

• Suitable for Class AB amplifiers

• High-quality RELPOL relays

• Continuous current: up to 5 A

• Peak current: up to 7 A

Complete Speaker Isolation

Each speaker line is switched independently. The module disconnects both the positive and negative speaker lines (L+, L−, R+, L−), providing complete isolation between the amplifier and the speakers.

This makes the module fully compatible with BTL amplifiers, where neither speaker terminal may be connected directly to ground.

Why Choose This Module?

High-quality RELPOL relays provide reliable switching and long service life.

The module switches all four speaker lines, providing complete isolation between the amplifier and speakers. With support for up to 5 A continuous current and 7 A peak current, it is suitable for a wide range of DIY and commercial amplifier projects.

The compact PCB makes the module easy to integrate into custom amplifier builds.

Important

The module must be powered on and off using the same DC power switch as the amplifier.

Both the amplifier and the speaker protection module should be switched simultaneously. This ensures that when power is removed, the module immediately disconnects the speakers, effectively preventing turn-off pops and unwanted output transients.

Available Versions

12 V DC version – designed for amplifiers and systems powered from 12 V DC.

24 V DC version – designed for amplifiers and systems powered from 24 V DC.

Please select the correct voltage version when placing your order.