Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

Cerwin Vega Stealth SX440.4 Repair
Cerwin Vega Stealth SX440.4 Repair
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 11th May 2013, 06:35 PM   #1
WidowMakerSB is offline WidowMakerSB
diyAudio Member
Join Date: May 2013
Default Cerwin Vega Stealth SX440.4 Repair

Hey everyone,

I'm new to the forums here and have been browsing around a little bit.

I've been into car audio for a long time, but never really dealt much with amplifier repairs. I've only had one other amp fail, and at the time I just got rid of it.

Recently I had one of my CV SX440.4 amps fail. These amps are class D amps and operate at 65Wx4@4ohms.

One day the amplifier simply quit putting out sound. The LED light was on and not in protect mode. Several months later I checked it again and it would blow the fuses immediately on connecting the power wires.

Since then I've taken the amp apart and started investigating it. I am starting to learn about amplifier repair and was wondering if you guys have any tips for Class D amps?

I've inspected the board and replaced some transistors that I thought might have been bad from my continuity checks and the board no longer blew the fuses immediately. However, no sound was being delivered through the board, just as before. While attempting to investigate while the board was hooked up to the power supply, 2 capacitors blew up. I'm going to replace these caps, but was wondering if anyone had any other suggestions. I've looked the board over top and bottom and don't see any evidence of visual distress (burning, ash, swollen caps, etc.).

Any help is greatly appreciated! I'll get some pictures if it will help. Thanks in advance!
  Reply With Quote


Cerwin Vega Stealth SX440.4 RepairHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
cerwin vega at-15s tips on repair and remodel dulobast25 Construction Tips 6 30th December 2012 04:02 AM
Cerwin Vega aperrado Subwoofers 4 1st February 2008 05:52 PM
Cerwin Vega D-7 sorenj07 Multi-Way 2 3rd March 2007 07:16 PM
Cerwin Vega! jamerick Subwoofers 4 6th January 2005 01:35 AM
Anyone out there use cerwin vega...... Radik Multi-Way 4 6th February 2003 12:13 AM

New To Site? Need Help?

All times are GMT. The time now is 01:12 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio