Finnally, found 1, Alpine type x - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 22 Old 08-22-10, 09:54 PM Thread Starter
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Finnally, found 1, Alpine type x

So i've been puttzin around on here for a bit with different threads on which subs to use for a small sealed box. Well i want to use the Alpine type x 12". WINISD for some reason doesn't work on my laptop and was hopeing someone could model it for me, the sub is a dual 4ohm (all i know about it now) that will reside in a 14x18x8ft room. If it will play better in a small ported box then i'll go that route but would really like to stay sealed (or at least small). I'll be throwing around 1200 watts at it. Thanks in advance if anyone comes up with somthing. I'm out for the night so talk to ya all afterwork tomorrow.
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post #2 of 22 Old 08-22-10, 10:36 PM
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Re: Finnally, found 1, Alpine type x


The 2nd Row is for the 12" Hope this helps.
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post #3 of 22 Old 08-22-10, 10:48 PM Thread Starter
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Re: Finnally, found 1, Alpine type x

Beautiful! Thanks man that is awesome. Now if i could only get the WinIsd to cooperate on the laptop i'd be set.
Thanks again, Bambino.
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post #4 of 22 Old 08-22-10, 11:10 PM
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Re: Finnally, found 1, Alpine type x

Is this for music, HT, or both? As for 1200 watts, is that into 2 ohms or 8 ohms?




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post #5 of 22 Old 08-22-10, 11:21 PM Thread Starter
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Re: Finnally, found 1, Alpine type x

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Is this for music, HT, or both? As for 1200 watts, is that into 2 ohms or 8 ohms?
Ahh, the guy i was waiting for. The sub will be for both i want it to play low loud and clean, as for power i'm going to put one of my HPSA's on each coil so i guess it would be 4ohms.

Thanks Mike.
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post #6 of 22 Old 08-22-10, 11:36 PM
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Re: Finnally, found 1, Alpine type x

Low loud and clean would mean ported as long as your definition of a small ported box is 4 cu.ft. net volume. 4 cu.ft. is optimum for this sub, it can be smaller at the expense of output. The HPSA's would be perfect with the HPF at 18 hz.

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post #7 of 22 Old 08-23-10, 06:23 AM Thread Starter
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Re: Finnally, found 1, Alpine type x

Ouch! 4cu.ft. is about 1.5cu.ft. bigger then i was hoping to go, guess somwhere you have to make comprimises. Would the 10" fit the bill or would i be best off with the 12"?
Thanks for your help mike.
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post #8 of 22 Old 08-23-10, 06:49 AM
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Re: Finnally, found 1, Alpine type x

Small, low, loud, pick 2...

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post #9 of 22 Old 08-23-10, 08:33 AM
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Re: Finnally, found 1, Alpine type x

Orange is the best you can do in 2.5 cu.ft. The modeling is with a pair of CSS 12" Passive radiators.

Finnally, found 1, Alpine type x-type-x-pr.jpg




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post #10 of 22 Old 08-23-10, 09:18 AM
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Re: Finnally, found 1, Alpine type x

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Ouch! 4cu.ft. is about 1.5cu.ft. bigger then i was hoping to go, guess somwhere you have to make comprimises. Would the 10" fit the bill or would i be best off with the 12"?
Thanks for your help mike.
IMO, a sealed sub need a couple drivers (or you need two of them) to get good usable deep output from them. At the very least you need a large driver (think 15") if you want something with real authority, but even a single 15" driver would have its limits, and more so in larger rooms.

Is budget an issue, because the only way to get a small sealed sub to give high performance is to put more cash into it. Other wise, as mike says, a pr design is probably what will fit your bill the best. FWIW, there are 15" drivers on the market that will work in only 40 litres (1.5 cu ft) and give decent results, but even then I would use 2. I had a play with it in a dual PR box (2.5 cu ft) and got the below result, so I would make sure you've chose the right drivers for your goals before settling on which ones would be best for you. The below wont really be that much louder but it will go deeper, and using a larger driver will also make it sound deeper.
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