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Sub Woofer
Here are a few tips on how to reproduce low frequencies efficiently. To reproduce low frequencies you need a big enough diagram which can move large amounts of air. Today the sub woofer will give you the advantage to experience the feeling of sound, a sub woofer reproduce low frequencies which can be felt when played loud enough.
With a speaker not mounted in an enclosure or box, you will hear no low frequencies. The high frequencies will still be there, high frequencies are very directional. The reason for this is acoustic phase cancellation at bass is the front of the speaker is one hundred and eighty degrees out of phase with the back of the speaker. If you place the speaker in a baffle you will be able to stop some of the phase cancellation from happening. The bigger the baffle the lower the frequency will be prevented from phase cancellation.
The next step is the enclosure. The reason for the enclosure is you can enforce the low frequencies. We do this by placing a port in the enclosure. The Port is a pipe like devise attached inside the sub woofer's enclosure, leaving a whole on the front of the enclosure. They use the port as a flute, but tune the sub woofer frequencies ether to improve the bass or to even out the frequencies responds to represent a flat frequencies responds. The bigger the speaker box the better the sound will sound. You can improve the enclosure so that it will be able to reproduce frequencies you will be able to feel more than you hear.
DD 8 inch sub in my danger ranger, loudest 8 ever!!!4 sale!!
Can I use large floor speakers (8 inch woofers) sub woofer?
Floorspeakers have 8 inch woofers. will sub woofer reduce bass from larger speakers
You don't say anything about your main L&R speakers other than woofer size but I am going to assume here that they have a good low frequency response.
The sub will only lessen the bass output from your mains in one of two ways:
1) If you send the signal to the sub speaker level and then to the mains from the speaker level outputs on the sub. There is likely a crossover in the sub that will take low level bass away from the sub.
2) If you designate all of the low level bass to be sent to the sub in the receiver's menu. Be sure you set your speakers to large in the receiver's menu. Also tell the receiver to send LFE to both the sub and the mains in the menu.
Go ahead and expirament with the crossover on the sub. If you set it kust below the low frequency response of the mains you will find that the sub will not see much use and the 8" just won't do the job satisfactorily in the rest of the omnidirectional range. There is nothing wrong with some overlap with the mains since bass below 100 hz or so is omnidirectional anyway. I would probably set the sub's crossover between 80-90 hz.
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