Quote:
Originally Posted by NJSPEEDER
i was lookin at subs and there are a ton of things i don't understand.
what does the weight of the magnet have to do with how good the speaker actually is? i see a lot of information with companies bragging about heavier and heavier subs with seemingly ever increasing prices to match, does it make that much of a difference?
when building or bying an enclosure, is the volume of the box just a blind volume, or do i have to account for the air space offset by the speaker and mega magnet?
what is the difference in sound between sealed box, band pass, and ported? what is the diffeence between ported and band pass, are they both just a hole for air to move through?
that is all for now. tia
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weight of the magnet is how much power it can push on the speaker cone. The larger the magnet, the lower the frequency and how much amps or force it can move it.
The enclosure is typically (if done right) tuned so there are no resonant frequencies in the box or interfering with the sound waves coming from the cones. When building a box or buying one you have to take the physical presence of the magnet and cone into account to get actual air space volume inside the box. Wave interference is called 'standing waves' , or waves that resonate. Try and find a box that has no right angles. Front sloped slightly, sides and back too. That'll help a lot. You'll def notice a change in sound for the better. A lot of ppl just want that boomy bass that vibrates your car. If you do it right, you can get great bass response and still be able to hear the rest of the music. If you do it right like that, you'll also need a lot less power to move the magnets.
A sealed box calculates bass response in a closed enclosure and uses the air inside the box to boost bass frequencies. With low frequency sound waves, they are omni directional, or move in all directions when leaving the cone, but with very low frequencies, like with low bass sounds, they move in the opposite direction of the cone and want to wrap back around behind the speaker. With an enclosed box, you'll get a low and tight response, but they tend to be muffled and narrow in frequency. Band pass means that the box has been tuned to boost a specific frequency band, say like 60Hz. Great if you love that frequency, bad if you like to hear an accurate reproduction of whatever it is you're listening too. Ported is great if you put the box in the right place. Ported means that there are openings in the box to allow some of the air inside to move out. The ports are typically (if done right) tuned to the box to better allow the harmonic overtones to be heard. So if there is like a really cool bass solo in the song you're listening too, you'll hear it accurately as you would on normal speakers and not muffled like with a solid box.