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

Solid State Talk all about solid state amplification.

Safe wolume control add-on
Safe wolume control add-on
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 30th May 2004, 11:02 PM   #1
rigadig is offline rigadig  United Kingdom
diyAudio Member
Join Date: May 2004
Location: Lincolnshire or Newcastle
Default Safe wolume control add-on

Hello, as well as my problem with the nad 3020 in my previous post, i also have another request for help. Basically, I have a set of speakers for my PC which consists of 2 satelites and a sub (the sub houses the amp and one of the satelites has a volume control) I quite like the speakers on the whole, however there is no way of turning the bass down, which makes them bad in some circumstances.
I considered building a high pass filter to go in between the output of the soundcard, and the input of the speaker set, but I don't think this is really what i want, since really i just want to adjust the volume of the sub separately to the satelites.

I opend the sub up and have looked at the amplifier inside, but it is very compact, and I can't see where it separates the sub signal and since they are pc speakers, there is no schematic available online. I don't really want to start taking the amp apart either, as this would invalidate the warrantee. The wires to the sub driver (4 ohm impedance) are connected to the amp by a small plug (not soldiered) so I was wondering if I could dissconnect that plug, and then essentially fit a variable resistor/pot in series with the sub driver, between the plug and the amp, as a means of controlling the sub volume.

Could you tell me if this will actuallly work, and will it be safe (I mean is changing the load on the amp safe?). If so, can you suggest some reasonable values for the variable resistor (I was thinking about 0-100 ohm range).

Thanks in advance for any help.
  Reply With Quote
Old 18th June 2004, 12:58 AM   #2
rigadig is offline rigadig  United Kingdom
diyAudio Member
Join Date: May 2004
Location: Lincolnshire or Newcastle
I am sorry to pester you good people, but I really need to know if this is safe or not, the bass from the sub drives everyone else in the house insane even. Please can someone help.
  Reply With Quote
Old 18th June 2004, 07:36 AM   #3
goobz is offline goobz  Australia
diyAudio Member
Join Date: Jun 2004
Location: Sydney
trying to attenuate at speaker level is probably a bad idea, becuase the variable resistor would need to dissipate a fair bit of power. you'd be better off finding the line level input to the sub amp and attenuating there with a variable resistor
  Reply With Quote
Old 18th June 2004, 04:42 PM   #4
Jan Dupont is offline Jan Dupont  Denmark
diyAudio Member
Jan Dupont's Avatar
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
If your sound card driver software on your PC has a equalizer or a sound selector (rock, classic etc.) try use that...
Or depending of the output of your PC system amplifier, you can use a 10W power resistor (or L-Pad pot) in series with the bass driver
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
  Reply With Quote


Safe wolume control add-onHide 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
Is it safe???? mikee55 Solid State 4 31st August 2006 10:17 AM
[Newbie] Using 50V cap with 30-0-30. safe? nina Chip Amps 19 31st August 2005 05:34 PM
Hakko 936 - ESD safe vs. non-ESD safe KT Parts 2 20th June 2004 03:58 AM
is it safe for the caps... Thomas Giz Parts 10 9th April 2004 04:29 AM
Is this safe for OPA2134? Thunau Solid State 6 13th February 2004 08:53 AM

New To Site? Need Help?

All times are GMT. The time now is 07:40 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio