Make Amp PSU From Salvaged Parts - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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
Reply
 
Thread Tools Search this Thread
Old 17th March 2010, 03:56 AM   #1
diyAudio Member
 
Join Date: Mar 2010
Default Make Amp PSU From Salvaged Parts

I want to make a PSU for a car sub amp to use on a home sub from parts salvaged from second hand store stuff.

I don't want to use PSUs from PCs I want to use a transformer as I am lead to beleive that it's better.

I vaguely know what I am doing but I can follow a schematic and I have completed a year electronics & PC repair course in 1987. I can completely wire a house or a car and build a PC.

So far I know that the amp requires 14.4 volts, have two 30amp fuses, outputs 400watts rms. I checked the specs in the back of the owners manual but no other input specs.

Where can I find a schematic for a project like that? How do I determine the output specifications of the amp? I know I can use the 14.4v but I know that I need at lease on more spec. can I use the 60amps from the combined fuses or can I use the 400watts output?

I don't want to spend a lot on a new plate amp because I have other hardware wants that gets more drool from me but if I can make this quality Alpine car D sub amp work for me cheaply, cool. I already have a 2.21cu. in. 250 watt amp sub woofer
  Reply With Quote
Old 17th March 2010, 08:06 AM   #2
wwenze is offline wwenze  Singapore
diyAudio Member
 
Join Date: Mar 2008
The 14.4V input from the car alternator is stepped up to higher voltages by the built-in power supply inside the amplifier, most likely switch-mode.

i.e. I would just give it a power supply with enough amperes and rather modify the built-in power supply instead, if you're looking for better/cleaner power.

If it uses 30 amp fuses 14.4V x 30A x 2 = 864W before the fuse blows 400W RMS output power is probably quite truthful.
  Reply With Quote
Old 17th March 2010, 12:24 PM   #3
diyAudio Member
 
Join Date: Mar 2010
I am not looking to modify the amp in anyway as i plan on putting it in my next car I want to make a power supply that plugs into a 120 outlet and connect to the amp as I connect power from the alternator.
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
salvaged plate amp - can I use here? Dave R Solid State 0 12th September 2009 06:45 PM
Can i use 2 of these PSU to make +- 24V? neutron7 Parts 16 24th April 2009 01:23 PM
Bass amp from salvaged parts? LastInLine Solid State 16 30th May 2007 03:25 AM
salvaged velodyne spl-1200 amp ginsner Subwoofers 1 8th August 2006 10:44 PM


New To Site? Need Help?

All times are GMT. The time now is 05:31 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2