forsellb

Id say just build a box that matches Fi's site enclosure recc's..

does it have great SQ? I mean I understand its a massive amp but yea.. So you think the original plan for the 4500D is still the best idea? And if I run it at 1O for 2 12 BTLs it should be fine?

Yea, I didnt think it was either, but all the amps I posted do rated power, then some. and the sundown has a 'supposedly horrible' eff ratio.. Im so confused now.. I was just gonna get the 4500D plus the BTLs but then my friend told me about that eff thing now Im lost lol

Also Id be running the sub at 2 ohms most likely, depending on if I get one or two amps

Also what about the Alpine MRP M2000?

What if it was a bigger difference, like 2cuft and 5 cuft? lol Im just lookin for the physics? behind this.. I wanna know as much as I can and this site is helping a TON Easiest way to eplain this is to go to http://www.linearteam.dk/default.aspx?pageid=isdonline type in your speakers T/S parameters and look at the graph and compare the frequency curves. If you have to convert metric to inch their is a conversion table also on the site. k thanks

Ok whats the difference in one box tuned to 35hz with 2.5cuft and another box tuned to 35hz with 3cuft? also whats the best material to build a box out of?

What if it was a bigger difference, like 2cuft and 5 cuft? lol Im just lookin for the physics? behind this.. I wanna know as much as I can and this site is helping a TON

Nice, thanks. What about the cuft difference? Would it make the notes sounds deeper or make the bass more accurate?

Probably just gonna stick with the Sundown 4500d, and when you measure the length * width for the port size, what about height? Height x width Lenght will give you your tuning frequencey AHH there we go, THATs why I got confused lol so when I figure Ill need the port to be tuned to a certain freq is that the wall inside the box? And thanks for answering my retarded 'n00b' questions, I just wanna learn how to do this all on my own.

Ok question 1 : Im planning on building my own box but when they say have 12-16 sq in of port space what does that mean? Which part of the port do you measure to get that figure. 2 : would a T-line be a better choice for 2 BTL 12s with a 2.5cuft box? or a regular L-port?

so if I made a box 16in wide, 16in tall and 24in long, with material being 1in thick. Id need a port the same height as the box and just as long, and 2.5in wide? so the overall width would be 18.5?

Probably just gonna stick with the Sundown 4500d, and when you measure the length * width for the port size, what about height?

awesome thank

Ok if I build a box that has a port that 'folds' would that be just as good as a regualr port?

Whoa, so I should probably stick to an L-shape port then is what your telling me. Also are Hifonics amps any good? just a random question.

so if I was looking to tune the box to a certian Hz and I made a port like that instead of a straight out port it would sound the same?

Yes its very crudely drawn but I just wanna know. Also is there a name or terminology for that type of port?

Awesome, great info, thanks guys.. And I agree complete shizzzon

Suppose it would help to know which kinda, 2 Audioque 2200D. Stats and stuff <a href="http://www.audioque.com/aq/AQamps2200D.htm">here</a>.

Im gonna get 2 12in BTLs and I was wondering if they could handle 3,000RMS or higher and not have to worry about it, and the sub would be a daily sub but fully loaded otherwise.

First off Im gonna get either a BTL or Kicker, cant make up my mind. Either a Kicker SoloX 15(2) or Fi BTL 15(2), the kicker can handle 2500RMS @DVC 2 ohms and the BTL can handle 2000RMS @DVC 2 ohms.. So would the BTL 15 be able to handle 2500RMS or higher with the P Chamfer, Cooling, HiXmCoil, Daily, I Heat Ring, and not universal options? Also Im gonna try to put these in a lincoln LS, and I cant determine if I want BTL15s or BTL12s, which would you guys suggest? p.s. the amp I will probably be using is a SPL FX1-5500D with 2500RMS @ 2ohm, 3200RMS @ 1 ohm, is that a good idea or anyone got any other suggestions? Thanks a lot, an obvious newbie

Ok, so basically a gain is this : the voltage from the RCA wires is say 250mV, and the amp takes that and does its thing which would amplify it by say 90dB, which means the subs would be receiving 250mV * 90dB, whatever that is.. and then introducing the gain just increases the voltage from the RCA to the amp so the amp would perceive the RCA to be sending a higher voltage, say 250mV * 10dB of gain, which the amp would then amplify the 250mV * 10dBof gain * 90dB which would then hit the speakers.. Is that correct? All the numbers are just random, just tryin to see if I got the idea..

ok so this is my plan, 2 Fi BTL 12" subs [Ohm: Dual 2, P Chamfer: no(it comes with cooling package), Cooling:Yes, HiXmCoil: yes, Daily or SPL: Daily, I Heat Ring: Yes Universal: no] with a 2.75~3cu ft ported box, tuned to around 35-38hz, depending on how I build the box, 2 Powermaster D3100s, a 220A HO alt(couldnt find the 250A I seen earlier ), 2 Audioque 2200D which will have a 1 ohm load at 14.4V so 2200RMS, and tons of 0 gauge wire lol.. plus a new head unit, might as well.. Does that sound like a good setup? Any changes? Also would anyone recommend an EQ, I know someone who can tune it for me if I need but Im just asking for now.