Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 24th January 2012, 08:20 AM   #1
diyAudio Member
 
Join Date: Sep 2009
Location: Pretoria
Default Subwoofer amp

Hi.
Anyone have a nice design for a 100Watt subwoofer amp?
I've alreadt built a nice active low pass with adj freq. My power supply will be about +/- 39V when fully loaded with a 4ohm speaker. My heatsink that I have already "ready-ed up" will be able to take 4x T0-3P style cases.
Just wanna build something thats gonna last! must be simple to build. discrete would be nice.
P.s there is no space for a fan!!
  Reply With Quote
Old 24th January 2012, 09:22 AM   #2
diyAudio Member
 
Join Date: Nov 2009
Location: Pune
if you are looking for subwoofer, would you be happy to use Class-D amp ?
__________________
There is always a first time....
  Reply With Quote
Old 24th January 2012, 11:32 AM   #3
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
There must be at least hundreds of built and tested 100W into 4r0 amplifiers on this Forum.
Join a thread and get a feel for how that particular choice works out. If the feedback is not to your liking, choose another.
__________________
regards Andrew T.
  Reply With Quote
Old 24th January 2012, 12:51 PM   #4
diyAudio Member
 
Join Date: Apr 2011
Location: Pretoria
A 100W into 4ohm? The world is your oyster!

This thread might help:
"ST151" 100W amplifier

However, your requirements to use an existing power supply and heatsink does narrow down things a bit.

Regarding the OPS, the first thing that comes to mind in a TO3 case is the MJ15003/MJ15004.

The 39V PSU rails are good for 190W into 4 ohm. In theory at least. What is the VA rating of your transformer? Will the speaker unit(s) that you have in mind handle it?
  Reply With Quote
Old 24th January 2012, 03:10 PM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by ingenieus View Post
The 39V PSU rails are good for 190W into 4 ohm. In theory at least.
No it won't. Not in theory, nor in practice.

You can expect 100W to 120W into 4r0 from your +-39Vdc PSU.
__________________
regards Andrew T.
  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
3 way active speaker system + Subwoofer based on Lm 3886 & 4780 kuldeep Chip Amps 13 19th April 2012 09:33 PM
LM3885 BPA200 200W Mono Subwoofer or Stereo Amp ASSEMBLED & TESTED w/heatsink! MartyM Swap Meet 8 21st November 2010 04:52 PM
DIY computer subwoofer & amp. GiveMeBoost Subwoofers 7 10th February 2005 01:51 PM
12"Pioneer 400W subwoofer with a RF Punch 360.2 amp? bigwig Car Audio 1 11th January 2005 05:42 PM
Subwoofer cabinet filling & net volume increase dis Subwoofers 0 4th July 2004 03:51 PM


New To Site? Need Help?

All times are GMT. The time now is 12:13 AM.


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