Triticum Agricolam Posted September 4, 2014 Report Posted September 4, 2014 I was asked to explain, so I did. I never said it was easy or that you had to use a trapezoidal design. I used that as an example of one of the best designs out there. And the JL HO box that was in the first post is a semi-trapezoid design with fewer parallel surfaces than a standard box. It is a fact though that there are many factors that play a role in just how a sub sounds in a given box volume. I get where you are coming from, and I don't want you to think I'm trying to bust your balls over this stuff. I'm only trying to make the point that just because something is better in theory doesn't always make it better in practice. Trapezoidal boxes and standing waves are a perfect example of this. Sure, standing waves are a bad thing to have and trapezoidal boxes are one way to reduce/eliminate them, but they just aren't an issue with car audio sub enclosures, so building a trapezoidal box doesn't gain you anything. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
philrab Posted September 4, 2014 Report Posted September 4, 2014 so building a trapezoidal box doesn't gain you anything. Unless you're in the case I'm in, where building a trapezoidal box allows me to fit more enclosure/airspace in my hatch since the back seats have about 20 degrees of recline. Huge difference, no, but it keeps my enclosure from eating up any more of my hatch than necessary. I was just curious if the box being trapezoidal had a drastic effect on anything, if there was a compelling reason not to or to build one, or if it's splitting hairs. 2015 Toyota Tacoma Build Thread 2007 Mazda 3; 5000K HID's, Kenwood Excelon KDC-X997, Infinity Reference 6.5 comps in front and coaxials in the rear doors, JL 320.4 four channel, Rab Designs built ported enclosure with an SA12, Kenwood monoblock, Redline Leater shift boot/e-brake boot/center console cover, JBR short shifter/shifter bushings/rear motor mount. Build Thread 1996 Mazda Miata: Kenwood Excelon HU, Alpine speaker in the doors, Clearwater (miata specific) headrest speakers. 1994 Mazda Protege: Kenwood Excelon HU, Infinity Reference 2 ways all around, 2x RF Punch 10's in ported boxes.
Triticum Agricolam Posted September 4, 2014 Report Posted September 4, 2014 Unless you're in the case I'm in, where building a trapezoidal box allows me to fit more enclosure/airspace in my hatch since the back seats have about 20 degrees of recline. Huge difference, no, but it keeps my enclosure from eating up any more of my hatch than necessary. I was just curious if the box being trapezoidal had a drastic effect on anything, if there was a compelling reason not to or to build one, or if it's splitting hairs. My bad, I should have said building a trapezoidal box doesn't gain you anything from a performance perspective. When it comes to making the box fit better obviously you build it whatever shape you have to. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds:
hispls Posted September 4, 2014 Report Posted September 4, 2014 Flaring the port like that should help, but I'm not in love with the idea of having the port and the cone so close to each-other. That may give some undesirable results. Looks like a wanna-be tapped horn.
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