DIGIT-ARC read-only archive · snapshot: July 23, 2026

Converting 2x2.1 into 4.2

7 posts · originally from https://geek.digit.in/community/threads/converting-2x2-1-into-4-2.133327/

nbaztec
nbaztec Original post #1
Oct 27, 2010 at 9:45 AM
Ok, I know 4.2s don't officially exist.
So I was thinking is it possible to connect another 2.1, that will *produce* the bass response? to to say Centre/Left/Right. Line Out will be used by a working 2.1.
Else if I buy 2xRCA(F) to 3.5mm converter then can I connect these to Left & Right & produce 5.1 sans the Centre speaker?

Just a thought.
Gollum
Gollum #2
Oct 27, 2010 at 10:00 AM
Dude i have a 6.3speaker system.
For center i have two philips full range speakers. Sub is a custom made 8"sub 100w rms.
Creative inspire 2.1 for front speakers.
Another creative inspire 2.1 for rear speakers.
And there it is 6.3 speakers making a total of 9 speakers connected to the realtek onboard sound card of my computer.
There is no problem of common ground since the comp grounds them all.
nbaztec
nbaztec #3
Oct 27, 2010 at 10:15 AM
How does your rear sub heaves for low frequency responses?
Gollum
Gollum #4
Oct 27, 2010 at 10:28 AM
It depends on the audio being played on the rear channel. But if you have ac3 filter on windows xp platform you can direct the sub channel to all the subs. You will need ffdshow for 7. Also best if you have soundmax audio card. Its driver is the best for de-muxing 2 ch to 5.1. Realtek drivers are not that great.
nbaztec
nbaztec #5
Oct 27, 2010 at 10:35 AM
I have Realtek HD Audio AC892, 8 channel. Really didn't wanted to go bust for a sound card. Still don't have a GPU yet.
Gollum
Gollum #6
Oct 27, 2010 at 11:03 AM
It will work just fine. Just set the audio config to 4ch quadraphonic. Install ac3 codec or klm mega codec pack. In ac3 codec config. Enable the option, "use ac3 filter for pcm"
Also use custom matrix for mapping the audio channels.
Wish i had my pc, i would have posted a screen shot for your settings.
nbaztec
nbaztec #7
Oct 27, 2010 at 4:35 PM
Thanks for your help. :)