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ASUS Xonar Essence ST (or STX) + Subwoofer - Can this be done via the card?

post #1 of 7
Thread Starter 
I have an ASUS Xonar Essence ST in one computer and an STX in another computer. I run a Klipsch Pro 2.1 on one computer. Thus it has a subwoofer (not the best in my opinion, but it works). And on the other I am running M-Audio AV40 speakers with bass boost. While they have good mids and highs, the bass is obviously lacking. Looking at the back of the sound card I see limited output options. Are there any output options that would allow a bass to be hooked up? I know you can try and run the rca analog audio (red & white cables) to a subwoofer that would accept them and then run that out to a pair of accepting speakers, but is that really the only option?

I suppose a person who listens to largely headphones would have a better appreciation for this sound card, but what is the reason for not supporting 2.1? When buying and running an expensive sound card, one might expect it to be able to support a subwoofer. Now it seems the only option for a sub + speakers is going to be a receiver. And at that point do I really need the sound card?
post #2 of 7
I'm not sure if this answers your question, but i'll give it ago.
You won't be able to run just a subwoofer from a sound card. This is because they (soundcards) are not an amplifier. Only a source.
Most speaker systems including the Klipsch Pro 2.1, will have their own amplifier circuit built into one of the enclosures. (also is one built into whichever M-Audio AV40 speaker is the heavier). There isn't a sub output from the AV40, so that ends that.
You would need a receiver/amplifier to do what your asking.
Not really a flawed sound card design, just not what your speakers were designed or intended to be used.
post #3 of 7
If you can't change the speaker configuration to have one of the outputs support the subwoofer/LFE channel (and I would be extremely surprised if this was the case), you should still be able to set multiple, duplicate outputs, and just connect any powered sub (including the Klipsch sub/amp with no satellites attached) to the rear one.

If it supports 4.1 or 5.1, it supports 2.1.
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post #4 of 7
Thread Starter 
I guess I just need to go with a receiver. Now the only trick is making sure I can throw my audio into the receiver when using hdmi to my second monitor being my TV. Also, making sure I can change audio channels on the receiver so I can use the speakers for music while on my PC or whatever it is I am doing.
post #5 of 7
You don't need a receiver, just split the RCA connections from the soundcard.

Some nicer quality splitters
http://www.amazon.com/AudioQuest-splitter-female-15-24cm-cable/dp/B000GUSQJG

Otherwise get cheapos from monoprice, but order 3 or 4 because some of them don't fit quite right. Their premium RCA cables are good quality though, and also very cheap.
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by DrGroove View Post

You don't need a receiver, just split the RCA connections from the soundcard.

Some nicer quality splitters
http://www.amazon.com/AudioQuest-splitter-female-15-24cm-cable/dp/B000GUSQJG

Otherwise get cheapos from monoprice, but order 3 or 4 because some of them don't fit quite right. Their premium RCA cables are good quality though, and also very cheap.

That's a good idea. Two questions.

Does this effect audio quality?

Will the sub strictly pick up on the lower frequencies? I assume for the most part that a sound card will simply throw the audio down the line if and then the appropriate sound devices output their specified range from the audio file.
post #7 of 7
Quote:
Originally Posted by RoddimusPrime View Post

That's a good idea. Two questions.

Does this effect audio quality?

Will the sub strictly pick up on the lower frequencies? I assume for the most part that a sound card will simply throw the audio down the line if and then the appropriate sound devices output their specified range from the audio file.

No it shouldn't affect audio quality. What will happen is you'll have two sets of full frequency output from the sound card, so the AV40 will get a full range but they can only output down to 85Hz. Your sub will very likely have a crossover built in that you can adjust to either 85Hz so it only produces the lowest freq that your AV40 can't, or you can set it a little higher and have some freq overlap. You may have a personal preference one way or the other.
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