Port Size: Please help

[v10_viper]

Ok, my box contains two Rockford Fosgate Punch Z's that are 10 inches, on the back it says 1.5" voice coil and 400 watt peak, so I assumed that it was 200 rms but some sites say only 150 rms but that's ok. I have a box that is made out of 3/4 inch thick board, and is 12.5" high in back, 7.5"deep on bottom, 5.5"deep on top, and the face is 12.85 inches tall. So the insides measure 11" x 6.00" x 4.75" x 11.35" x 16.375", which equals about 2.8 cubic feet per section because the box is seperated on the inside in the middle, I drew a picture, I hope it works for you, but I want to know how big I should make those primary ports, I put the board down about an inch because I dont want stuff falling from the top, I'll do it no matter what but I might put screen over the top port, I figured like 2" x 4"But I'm sure that I did the math right so each box is 2.8 cu. ft.

Then, I forget the name of the kid on here, he's the 15 year old one or w/e, I'm typing this on a word processor becasue AF is down at the moment, but in his sig he has like, "Just a 15 yr old kid wasting his money on car audio", so here for you is a list of amps, I dont want anything special, just something that is pretty cheap and will work for now until I get a better one or a different vehicle, so if you can, look at all those amps and tell me what would be the best, I dont want to spend much, I only spend 100 bucks for both of those subs and a box but I have to resize the box. The help would be great, thanks!!!

Btw, I've never looked into it, but what's the advantage of MOSFET?



http://www.millionbuy.com/bosk580.html

http://www.millionbuy.com/jenjxp720.html

http://www.millionbuy.com/prfca800.html

http://www.millionbuy.com/prfcl800.html

http://att.dealtime.com/xPF-Power_Ac...Gothic_OV2_820

http://store.yahoo.com/millionbuy/kenkfcc6889.html -Door speakers I think I want, any good??

http://www.millionbuy.com/bosk680.html

http://www.millionbuy.com/prfca1200.html

http://att.dealtime.com/xPO-Power_Ac...othic_OV2_1200

http://att.dealtime.com/xPO-Lanzar_Vibe_250

[Haibane]

Originally Posted by v10_viper

Ok, my box contains two Rockford Fosgate Punch Z's that are 10 inches, on the back it says 1.5" voice coil and 400 watt peak, so I assumed that it was 200 rms but some sites say only 150 rms but that's ok. I have a box that is made out of 3/4 inch thick board, and is 12.5" high in back, 7.5"deep on bottom, 5.5"deep on top, and the face is 12.85 inches tall. So the insides measure 11" x 6.00" x 4.75" x 11.35" x 16.375", which equals about 2.8 cubic feet per section because the box is seperated on the inside in the middle, I drew a picture, I hope it works for you, but I want to know how big I should make those primary ports, I put the board down about an inch because I dont want stuff falling from the top, I'll do it no matter what but I might put screen over the top port, I figured like 2" x 4"But I'm sure that I did the math right so each box is 2.8 cu. ft.

Then, I forget the name of the kid on here, he's the 15 year old one or w/e, I'm typing this on a word processor becasue AF is down at the moment, but in his sig he has like, "Just a 15 yr old kid wasting his money on car audio", so here for you is a list of amps, I dont want anything special, just something that is pretty cheap and will work for now until I get a better one or a different vehicle, so if you can, look at all those amps and tell me what would be the best, I dont want to spend much, I only spend 100 bucks for both of those subs and a box but I have to resize the box. The help would be great, thanks!!!

Btw, I've never looked into it, but what's the advantage of MOSFET?



http://www.millionbuy.com/bosk580.html

http://www.millionbuy.com/jenjxp720.html

http://www.millionbuy.com/prfca800.html

http://www.millionbuy.com/prfcl800.html

http://att.dealtime.com/xPF-Power_Ac...Gothic_OV2_820

http://store.yahoo.com/millionbuy/kenkfcc6889.html -Door speakers I think I want, any good??

http://www.millionbuy.com/bosk680.html

http://www.millionbuy.com/prfca1200.html

http://att.dealtime.com/xPO-Power_Ac...othic_OV2_1200

http://att.dealtime.com/xPO-Lanzar_Vibe_250

I am not quite sure what ohm rating your sub is but here, look at this http://cgi.ebay.com/ws/eBayISAPI.dll...category=18797

[v10_viper]

Originally Posted by Haibane

I am not quite sure what ohm rating your sub is but here, look at this http://cgi.ebay.com/ws/eBayISAPI.dll...category=18797

Yeah it'd work for one sub, but I have two of them, each 150 rms, and they are 4 ohms, but thanks anyways for taking the time, I really dont need a decent amp as this is just something that will work, also, should I just make it a sealed box?? A kid recommended it and he knows a lot of shit about car audio, has a truck like mine and one Kicker 10" CVR or something like that that is 300 rms, it's awesome in his truck.

[Haibane]

Originally Posted by v10_viper

Yeah it'd work for one sub, but I have two of them, each 150 rms, and they are 4 ohms, but thanks anyways for taking the time, I really dont need a decent amp as this is just something that will work, also, should I just make it a sealed box?? A kid recommended it and he knows a lot of shit about car audio, has a truck like mine and one Kicker 10" CVR or something like that that is 300 rms, it's awesome in his truck.

I am just wondering, but why do you not think that a 2 ohm load at 320 watts would work fine for 2 speakers... It seems you do not realize that Class D mono amps are highly used for more than one subwoofers. Subwooofers do not do anything different in stereo, since bass is all in one signal. you just run 2 wires to one channel at a parrallel wiring.
If these are 4 ohm SVC then that is a perfect match amplifier that I gave you giving 320 watts rms at 2ohms to 2 subwoofers.

[v10_viper]

Originally Posted by Haibane

I am just wondering, but why do you not think that a 2 ohm load at 320 watts would work fine for 2 speakers... It seems you do not realize that Class D mono amps are highly used for more than one subwoofers. Subwooofers do not do anything different in stereo, since bass is all in one signal. you just run 2 wires to one channel at a parrallel wiring.
If these are 4 ohm SVC then that is a perfect match amplifier that I gave you giving 320 watts rms at 2ohms to 2 subwoofers.

Yeah I see your point, I have considered all of what you just said in that post, but the reason I'd like to have two channels is because some songs that I listen to are different from left to right, one song by Nelly has it where it does a thing on the left, then right, then repeats that, and I think I'd like it to be seperate channels, because this box is 35" wide and the subs are seperated quite a bit. It's not that I dont like your suggestion, I like the idea very much and I might end up doing it, I guess it's just personal preference, but I'll definately be thinking about it. Thing is, I'm not working to have a necessarily loud truck or anything, I just want it to sound good I guess. I mean it's the first time I'll have subs in a vehicle, so I'm not really worried about having it be an awesome one or anything, just something that thumps.

[Haibane]

I am pretty sure that, setting up a set of subwoofers stereo will not change on that song, are you sure it is bass that goes left right?

[v10_viper]

Originally Posted by Haibane

I am pretty sure that, setting up a set of subwoofers stereo will not change on that song, are you sure it is bass that goes left right?

Well if you say I should go with a mono amp over a 2 channel amp then I suppose I will, but I think it still want the load at 4 ohms don't I?

Can anyone answer my other questions in the first post??

[Haibane]

If they are SVC and you have 2 of them 2 ohms is about your only bet, there is nothing wrong with running speakers at 2 ohms, most people have DVCs that run at 1 ohm, let alone 2 ohms, since you have 2 you and they are svc, you will want to wire both pluses from the speakers to the 1 plus on the amp and both negatives on the speakers to the one negative on the amp, if you choose to use 2 ohms, there is no downfalls in using a lower ohm power aside from more battery pull that I know of.