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Old 7th May 2012, 02:06 PM   #1
Hakimi is offline Hakimi  Malaysia
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Talking 5.1 ch using TDA1558Q

Hi,
I saw output of my computer is, Front LR, Rear LR, and CenterSub.
my Creative usb sound card
Click the image to open in full size.
Is it possible i built 3 set of TDA1558Q (2ch each) and connected to computer. and drive the 5.1ch home theatre speaker ?

and using this potentiometer as volume control
Panel Mount PCB 6xStepx50k Linear 50k Pots Rotary Volume Tone Potentiometer,P001 | eBay
Any one does this?
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Old 7th May 2012, 02:54 PM   #2
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its no problem. but i guess i will need a sub filter too.
and use a Log pot insted of Lin pot.
i'm building a 5.1ch plate amp with LM3886 and a UcD400 now.
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Old 7th May 2012, 03:04 PM   #3
Hakimi is offline Hakimi  Malaysia
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does SUB output from card is CLEAN bass ? doesn't need filter..?
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Old 7th May 2012, 03:09 PM   #4
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i doubt the sub out has a filter.
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Old 7th May 2012, 05:11 PM   #5
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it is based on software. Some do have the "bass redirect" ability (if i remember 1st gen audigy called it like this), and most do not have this option.

Better to have that filter.
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Old 7th May 2012, 05:39 PM   #6
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or find a x-over plugin for the sound card. don't know if it exist. but one can check
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Old 7th May 2012, 09:47 PM   #7
hurtz is offline hurtz  Germany
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Join Date: Jun 2010
To consider:

-If the subwoofer isn't DIY it will most likely be an active subwoofer.
-Usually if playing 5.1 content the lfe channel is already filtered.
-Many Subwoofers have a crossover included, sometimes with adjustable cutoff.
-If the subwoofer is used to enhance the lower spectrum of your other speakers it is desireable to adjust cutoff frequency manually, either by the subwoofer or in software on the soundcard or my preferred method in the media player directly (mplayer).

cheers,
hurtz
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Old 7th May 2012, 11:51 PM   #8
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ONE thing to consider.

Is it possible i built 3 set of TDA1558Q (2ch each) and connected to computer. and drive the 5.1ch home theatre speaker ?

so not a finnished product.
LFE has NO X-over.
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