JDN1014

i play wayy under tunning quite often without blowing subs only time i blew a sub was from a bad glue joint. now.. if it was for pure SPL yes.. playing under tunning would blow them , daily not so much IMO

wasted911

iTrader: (2)

here are WAY too many factors in that equation. If you want to make it louder. Buy a louder car. Same excursion, same power.

but really there's things like cancellation between the port and sub as well as standing waves etc.

Lord Huggington

iTrader: (1)

Enough power to get the most out of it without it dying, so something like 3-5K. Who knows if it'll mechanically/thermally handle that. 250-350A alt + 3 batteries .

Is 3 cubes too much when they recommend 1.7-2.5? That box is asthetically perfect for my cabin-trunk opening - 2" spacing on 3 dimensions, and takes up the entire "throw-in-box" area. I was lucky that it came out as 3 @ 31. Wanna wall it off.

How are the leads on the 2010 BTL's?

When my XXX was working it was in 2.2 @ 36, one day I had forgotten that I had a 20 HZ tone as song #1 on a burned CD, and it was cranked. The sub looked like it was going to jump out of the box but holy cow was it ever a loud 20 HZ. With stock electrical my amp must have not been putting out anywhere near 1500W because 20HZ sounded louder (as in sounded AND actually) than 36-42 HZ tones. I guess that's when xmax > power?

MTA

iTrader: (1)

im not going to say it...
daily blows subs just as easily as SPL ... in SPL you are using only a few frequencies +/- your center frequency... chances of blowing your sub are much lower than daily where you need to reproduce a wide range of bass frequencies.( im not talking about SPL overpowering at this moment, where you play 3+ times the subwoofers power handling)


do some research on subwoofer enclosures . and read ALOT

JDN1014

im sure alot has to do with box design yes

Dukk

Increase your tuning to 35-38hz. How does your vent length look now? If it's still too long, roll back to 38-40 sqin and see how that looks.

Mach5

Actually is quite the opposite, further the coil is out the gap, lower the back-emf thus higher current and lower impedance, until you heat up the coil enough to increase the Re.

Lord Huggington

iTrader: (1)

What is "too long"? You can either have more port area or a shorter port - do I have to model them or is there a guideline to which is better?

Does the port lose force when it's long?

Lord Huggington

iTrader: (1)

3 cubes each

Port 3.5 W x 12.5 H x 27.25 D
34.66 HZ

Port width 3.25 W x 12.5 H x 27.375 D
33.44 HZ

Port width 3 W x 12.5 H x 27.5 D
32.16 HZ

I like my box moar.

Dukk

You were the one saying the port was really long. You tell me what's too long..

IMO 53 sqin looks like too much vent.