Mriganka Majumdar

INDIA • + Follow

Chad Ross

UNITED STATES OF AMERICA
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Description

Speaker Protection 4KW

Components

1. 3×10KΩ resistor 1/4W.

2. 1×39KΩ resistor 1/4W.

3. 2×1KΩ resistor 1/4W.

4. 5×1N4007 Diode.

5. 1×Transistor C9013.

6. 2×Transistor C945/ C1815.

7. 2×220uF capacitor 25V.

8. 1×Preset 100K-220K.

9. 1×2 pin XHB connector base 2.54 mm.

10. 4×Vertical PCB terminal 6.3 mm.

11. 2×3 mm LED (Red, Green).

12. 1×12V 30A Relay.

Hello Friends, In this post, I make a 30A speaker protector. You can use this speaker protector for up to 4000W amplifiers. This speaker protector has protection and an active LED, so you can easily understand whether your amplifier is in a fault condition or a normal condition. This circuit is powered by 12 volts. If this circuit is connected to the amplifier output, and if the transistor burns out, this circuit will not allow current to flow through the speaker.

Schematic and Layout

All Files

https://www.technicalmriganka.com/2025/10/speaker-protection-4000w.html

Download Gerbers Download BOM(Bill of materials)

Oct 25,2025

518 views

Speaker Protection 4KW

Speaker Protection

518

Published: Oct 25,2025

Standard PCB

Download Gerber file 25

BOM(Bill of materials)

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