Monday, December 16, 2013

What is the best soundcard on the market?

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 on Elegant Home Designs: Best Tips on How to Place Home Theater Speakers
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Stephen J


I've been using onboard sound for the last year or 2 for my comp. & I've been saving up for a soundcard. So with that in mind what soundcard would you recommend for my computer? Keep in mind I value quality of sound vs. distintion between speakers (since I only have a 2.1 speaker system. I mainly play Halo 2 & listen to MP3's and watch videos on my comp.
Thanks for answering.



Answer
On board sound are good enough if you have only 2.1 Speakers. But if you must, Sound Blaster X-FI Series is a good choice. They are range from around $70 to $179, depends on which model you pick.

Would i be able to do this to my speakers?




Joshua


I have a speaker system, and it comes with two speakers and a subwoofer. would i be able to add additional speakers just by stripping the wires off the other ones and attaching it? would i need an adapter? if so, what adapter?


Answer
To the amplifier the speaker is called a "load". How much of a load it is depends on the impedance of the speaker. For example the speaker might be 8 ohms. If you put two 8 ohm speakers on the same amplifier in parallel the load becomes 4 ohms. You might think this is half the load but it's actually double. The reason it's double instead of half is because we are talking about impedance as opposed to conductance. Conductance is how easily electrical current flows through the load and it is the inverse of impedance.

You probably have heard the term "short circuit" and realize it's a bad thing. A short circuit is when the load impedance approaches zero ohms. The more speakers you add in parallel the more your amplifier sees the load as a short circuit. You're amplifier doesn't have enough current capacity to handle load impedances lower than the speakers it was designed for. (you are current limited with speakers in parallel)

You could put additional speakers in series but this has problems too. One issue is the speaker impedance is not a constant value relative to frequency. If the speakers are not identical they will have an affect on each others frequency response. Also with two 8 ohm speakers in series your problem becomes insufficient voltage. As an example, you need 2.83 volts across an 8 ohm load to produce 1 watt. The same 2.83 volts across 16 ohms produces 1/2 watt which is divided between the two speakers leaving each with just 1/4 watt. With speakers in series your amplifier is voltage limited. Internally power supplies called DC rails sets maximum voltage capability of the amplifier.

So there is no good way to do this. If you need louder bigger sound you could try replacing the existing speakers with bigger more efficient ones. Speakers have a sensitivity rating which defines how loud they will play with a given power input. If you find speakers with +3 dB higher sensitivity it is the equivalent of doubling power. Because our ears work on a Log scale however you need + 10 dB to seem as though the loudness has doubled. So you would need much bigger more efficient speakers and or a complete replacement of your system with a bigger more powerful one.

mk




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Title Post: What is the best soundcard on the market?
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