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Winisd Alpine Type R Box

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=105602
Printed Date: March 29, 2024 at 1:39 AM


Topic: Winisd Alpine Type R Box

Posted By: mcben789
Subject: Winisd Alpine Type R Box
Date Posted: June 21, 2008 at 5:45 PM

Driver            : Alpine Type R 12"
     Vas : 45.0
     Qts : 0.47
     Fs : 29.00
     SPL : 85.00
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Project by        : Owner
Project for       : you
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Number of drivers : 1
Box type          : Vented
Box size          : 70.8 l
Tuning frequency : 28.16 Hz
Vent              : 1 vent(s)
     0.351 m length for each
     0.102 m round


             Relative       
Freq        Gain        Phase        SPL   
[Hz]        [dB]        [deg]        [dB]
20.00        -10.55       254.96       101.44
25.00        -2.70        211.80       109.29
30.00        0.93        163.62       112.92
35.00        1.48        128.78       113.47
40.00        1.28        106.84       113.27
45.00        1.04        91.99        113.03
50.00        0.85        81.12        112.84
55.00        0.70        72.72        112.69
60.00        0.59        65.99        112.58
65.00        0.51        60.45        112.50
70.00        0.44        55.79        112.43
75.00        0.38        51.83        112.37
80.00        0.34        48.40        112.33
85.00        0.30        45.41        112.29
90.00        0.27        42.77        112.26
95.00        0.24        40.43        112.23
100.00       0.22        38.34        112.21
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Generated with WinISD[0.44] freeware (C) Juha Hartikainen
You can download your own copy from : https://www.linearteam.org

GAIN
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GROUP DELAY
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PHASE PLOT
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SPL
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This Alpine Type R dual 4 ohm subwoofer will be powered by an Alpine 500 watt amp (@ 2 ohms). I was just wondering if this box would suffice.

Opinions?

-------------
Sasquatch...
We know your legend's real...



Replies:

Posted By: aznboi3644
Date Posted: June 21, 2008 at 7:58 PM
that should sound pretty good...I always like type R's in ported enclosures between 2.5 - 3 cu ft




Posted By: mcben789
Date Posted: June 22, 2008 at 12:45 PM
Alright thanks man...

Should I really expect around 110 db's out of that one 12"?

-------------
Sasquatch...
We know your legend's real...




Posted By: stevdart
Date Posted: June 22, 2008 at 2:22 PM
Likely to be more than that due to cabin gain (if you set the system up to achieve such a goal, that is...).

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: mcben789
Date Posted: June 23, 2008 at 8:32 PM
Is setting your cabin gain when you get an o-scope and the whole nine yards to get super SQ?

If it has to do with that I wasn't really going for that. I was just trying to design a box to make the woofer be really dynamic.

-------------
Sasquatch...
We know your legend's real...




Posted By: stevdart
Date Posted: June 23, 2008 at 8:42 PM

I meant that you were referring to SPL, not SQ, in asking about decibel level.  All the little details of the system work together to maximize SPL.

The modelling program doesn't account for cabin gain and doesn't know what frequency it will boost;  therefore the cabin gain isn't detailed on the SPL chart.  If the program shows 110 db at an attainable power level, the real-life level will surpass that because of the gain in decibels created by the (relatively small) car environment.



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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.




Posted By: mcben789
Date Posted: June 23, 2008 at 9:13 PM
Oh okay. Well I was going for more of a sound quality box but would like it to be loud. From the look of those charts do you think it'll sound good?

-------------
Sasquatch...
We know your legend's real...





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