boring sound from computer speaker - diyAudio
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 16th April 2004, 08:41 PM   #1
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
Default boring sound from computer speaker

I'm experimenting with my Creative Labs computer speakers.
It consists of two satelites and a small sub. As they are they sound decent. The wall wart supplied with the system consists of a transformer rated at 45VA with a single 12V secondary, 2.9 A. The amp module consists of a chip amp (not sure what type). I'm wondering if I could use a toroid type rated at 100VA 12V secondary at 4.17A. With each satelite i have attached a makeshift crossover with a 4.7K and 0.5mH paralled together then connected in series with the + side, with this it sounds pretty good. I am assuming it will be ok, just concerned about the amperage.

JH
  Reply With Quote
Old 16th April 2004, 09:16 PM   #2
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
Are you saying that you have put a 4700 ohm resistor and a parallel .5mH inductor in series with the satellite speakers?

If you're not satisfied with the sound (and I gather from your posting that you are not), replace the speaker system rather than trying to change the design.

You can replace the Wall Wart with something that provides more current. You won't hear any difference.

JH, I'm not being nasty. I had the same speaker system at my office. I replaced it with something better because it really sucked.
__________________
Frank
  Reply With Quote
Old 16th April 2004, 09:30 PM   #3
diyAudio Member
 
MEGA_amp's Avatar
 
Join Date: Oct 2003
Location: CT
4.7K is a capacitor (label on it = 4.7K250). No worries, i got tough skin. It sounds ok, I was just playing around with it to see if I could modify it. It really is a piece of crap anyway. Its cheap and if it breaks who cares.

Any advice I get on this forum, i consider good advice.

Thanks

JH
  Reply With Quote
Old 17th April 2004, 12:28 AM   #4
lucpes is offline lucpes  Romania
diyAudio Member
 
Join Date: Dec 2003
Location: Iasi
Send a message via Yahoo to lucpes
That's a 4.7uf cap

You might try opening the unit and look for power filtering caps in there, add a some 2200uf on top of on what's in there at each amp (watch for polarity!) and bypass those with a polypropylene cap while you're at it.

As for the trafo, you can use w no prob up to 1000VA rated one - just kidding ) don't do it like that - extra amperage capability on the trafo side will do no harm, but why bother?

The VA rating on trafos is the maximum specced current, in practice they stay at much lower levels, very close to what you actually draw from it.

Now, seriously, there's no need to put more money in those 'speakers' but if you get the 'tinkering' itch and there's nothing better to tear apart or build from scratch so be it
  Reply With Quote
Old 18th April 2004, 02:51 PM   #5
jaycee is offline jaycee  United Kingdom
diyAudio Member
 
Join Date: Apr 2004
Location: Norwich, UK
To be honest if you really want to beef up a pair of computer speakers, a good cheap solution is to use a National Semiconductor "Overture" poweramp IC (yes, the same things used in GainClones). It may not be worth it though if the speakers are too cheap and nasty to put up with any kind of decent power.

A retailer over here called Richer Sounds sells a pair of speakers called Ariston MSX04 for 15, they are 50W and fairly decent for computers. The only catch is you have to keep em away from the monitor as they're not shielded. These, run from a National LM4732 50W per channel amplifier, sound far far better than any computer speakers you could buy for a similar price.
  Reply With Quote
Old 18th April 2004, 03:00 PM   #6
Account Disabled
 
Join Date: Apr 2003
Location: US
Quote:
Originally posted by jaycee
These, run from a National LM4732 50W per channel amplifier, sound far far better than any computer speakers you could buy for a similar price.
what if you just yank out the 4732 and use hardwire a pair of 3875s / 3886s in its place?
  Reply With Quote
Old 18th April 2004, 04:07 PM   #7
jaycee is offline jaycee  United Kingdom
diyAudio Member
 
Join Date: Apr 2004
Location: Norwich, UK
I meant as in, a seperate 4732.. i suppose you could use whatever chip you liked They're sold as "Hi fi" speakers, but to be honest I wouldn't give them that much credit, I certainly wouldn't hook em up to any kind of "Hi fi" amp!
  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
Sound card for computer audio/testing ted4412wilt Digital Line Level 1 9th February 2009 05:06 AM
Computer Sound bulgin Solid State 0 20th June 2008 01:35 PM
5.1 Surround Sound for Computer - ChipAmp DSchmidt Chip Amps 0 24th December 2005 05:22 PM
sound insulation cabinet for noisy computer mali_aber Everything Else 28 12th November 2005 07:02 AM
Optimum settings for Computer Sound levels downhere Solid State 5 20th December 2001 03:52 AM


New To Site? Need Help?

All times are GMT. The time now is 01:02 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