Looking for stand-alone amp to drive subwoofer - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 25th November 2009, 08:36 PM   #1
Banned
 
Join Date: May 2008
Location: Switzerland
Default Looking for stand-alone amp to drive subwoofer

Hi guys

I'm looking for an amp to drive a Shiva-X subwoofer (65l sealed). Searched high and low but couldn't find a model meeting my requirements:

- 250W@4Ohm minimum
- adjustable gain
- fanless
- balanced (XLR) and unbalanced (RCA) inputs
- 115V@60Hz/230V@50Hz compatible
- rack-mountable
- 1RU

Any help would be highly appreciated.

Best, Markus
  Reply With Quote
Old 25th November 2009, 10:05 PM   #2
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
Closest I can't find is an ART SLA2. It isn't fanless, but the spec does say "Stable into 4 Ohms" for bridge mono operation.

4 Ohm operation with just natural convection cooled (no fan at all) is a sizable heatsink. I got one here for Class A/B amp design of my own and it weighs probably four pounds. Actually, it is 3.5 inches of this extrusion.

A different class of amplification such as H or D ought to get the heat issue out of the way, thus the size, so 1 RU is possible. The 1 RU spec is really pushing it. Have you considered a plate amp built into the cabinet?
__________________
Think out of the box
  Reply With Quote
Old 25th November 2009, 10:10 PM   #3
Banned
 
Join Date: May 2008
Location: Switzerland
Thanks davygrvy, but the ART's all have fans. 2RU would be an option if there's really no 1RU that suits my needs.
A plate amp is not an option because I don't want to run an unbalanced line cable several meters through the room.

Best, Markus
  Reply With Quote
Old 25th November 2009, 10:32 PM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
See if you can pick up a Hill Chameleon in good used condition.

edit: I thought they were fanless but not sure now.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.

Last edited by richie00boy; 25th November 2009 at 10:41 PM.
  Reply With Quote
Old 26th November 2009, 02:36 AM   #5
diyAudio Member
 
Join Date: Oct 2008
TOA electronics makes 2 and 4 channel class D amps that will do 250W at 4 ohms and fit in a single space - I'm not sure whether or not they have fans or balanced inputs though (and they are not exactly cheap). I think I have seen some others like that, but can't remember where.

- Doug
  Reply With Quote
Old 26th November 2009, 03:25 AM   #6
Banned
 
Join Date: May 2008
Location: Switzerland
richie00boy, don't feel comfortable with buying used amps from a company that is out of business.

Doug, they too have fans and are pretty pricey at $800...


I was always under the impression that there are tons of amps out there for each and every need - far from it.

Best, Markus
  Reply With Quote
Old 26th November 2009, 07:39 AM   #7
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Two options - one, find a PA amp, with a fan, with some kind of system that means it only comes on when it gets warm.

To quote my grandad, "Why do you want to buy one when you can make one at home?"

I'd agree with the suggestions for class D, or even tripath (www.41Hz.com)

Chris
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 26th November 2009, 12:04 PM   #8
diyAudio Member
 
Join Date: Oct 2008
I'm currently putting together a dual 2x250 amp form these guys: Class D Audio Home page

That's 4 channels for ~$325, including power supply - however, I also spent about ~$150 for an enclosure + connectors). No fan required, but they do require 2U height because of the power transformer. One of their amps has balanced inputs. I'd be happy to let you know how it works when I get it up and running.

- Doug
  Reply With Quote
Old 26th November 2009, 01:38 PM   #9
Banned
 
Join Date: May 2008
Location: Switzerland
Thanks guys but I think I'll get a BEHRINGER: A500

Best, Markus
  Reply With Quote
Old 26th November 2009, 06:07 PM   #10
Pallas is offline Pallas  Pakistan
diyAudio Member
 
Join Date: Aug 2004
Location: ATL
The Behringer is a tiny bit below your requested power level, but otherwise seems to fit the bill pretty well. See http://theaudiocritic.com/plog/index...Id=22&blogId=1 if you haven't already.
  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
Infinite Baffle Subwoofer Speaker Stand hulkss Subwoofers 11 24th November 2009 01:43 AM
subwoofer integrated into stand utjay2008 Subwoofers 3 25th June 2008 11:28 PM
Plans for BIG 2x Ascendant Avalanche 15 subwoofer/TV stand BHTX Subwoofers 5 30th October 2006 12:42 PM
Subwoofer stand audiobomber Subwoofers 10 25th September 2005 01:25 PM
MTM stand mount or floor stand garfieldcat Multi-Way 5 7th July 2004 12:45 AM


New To Site? Need Help?

All times are GMT. The time now is 10:00 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