Well then Im looking at a "4th order" is that still a bad Idea?īack in the old days, we had to work the math by hand which was not too difficult if we had the driver parameters. Doesn't matter what variation it is, any mass-produced genetic ported box is going to make the driver sound like shit. I've seen tests that show Best Buy's generic ported boxes sitting at 50-62hz as the tuned frequency. Irregardless of the ported box design - whether it be slot ported, 4th or 6th order bandpass, or ABC - the sub is not going to sound good if it's put in a box that is not designed around the t/s specs of the driver, which is what he's asking. The speaker cabinet, or box, must be matched to the driver, and vice versa.
#Winisd abc box drivers
Unless you are expert in speaker design, I would not suggest you buy separate drivers and cabs and put them together yourself. If all of the sound comes from a port, it is a 6th order (thumping type) cab.
The port may be on the front or back of the speaker cab. For part of the freq range the speaker is producing most of the sound, and the bass end is extended by the port. These you see both the woofer and the port. The more common (in stereo gear) ported cabinet is "4th order". In these the woofer is completely enclosed in the cabinet. Yes.same as I said at the beginning of the thread. Ok so I sould stay away from any mass produced ported boxes and go with the seal since the boxes are not built for a alpine driver in general. They are mainly used for hip-hop/rap or "urban contemporary". Walking bass lines do not walk, just thump. They resonate on one note only and produce a one note bass that is rather useless except to make thumps. You can tell these because you see no woofer, just a port. Now, Isobaric, "6th order bandpass", and a few other common subwoofer designs are basically "Johnny One Note" thumpers. So it is not simply a matter of "port the box to get deeper bass", nor is it true that "a ported speaker is 6 db more efficient than an unported speaker".ĭo not make the choice based on ported, vs unported, but rather how they sound. ( * Aside: Woofer cone movement is actually at a minimum when port radiation is maximum.) 30 hz is a good subsonic filter frequency. For this reason, especially with ported boxes, a subsonic filter is often used ahead of the bass amp to limit power being pumped into the woofer below the safe range of the woofer and the music. But below the resonant frequency of the port* (which should integrate smoothly with the resonant freq of the box and woofer itself, extending the bass smoothly) the cone will become uncontrolled and there may be excessive cone movement that can severely damage the woofer. Remember, anything outside of the desired bass range is just noise.Ī ported box may or may not go lower.
It all depends on the characteristics of the woofer.įor a subwoofer a sealed box gives a sort of mechanical low end filter that limits excessive cone excursion below the desired pass band. (OK, guys, stand back, don't try this at home, leave it to the professionals.
0 kommentar(er)
