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Winisd Alpine Type R Box


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mcben789 
Copper - Posts: 171
Copper spacespace
Joined: October 01, 2007
Location: Mississippi, United States
Posted: June 21, 2008 at 5:45 PM / IP Logged  
Driver            : Alpine Type R 12"
     Vas : 45.0
     Qts : 0.47
     Fs : 29.00
     SPL : 85.00
--
Project by        : Owner
Project for       : you
--
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
--
Generated with WinISD[0.44] freeware (C) Juha Hartikainen
You can download your own copy from : http://www.linearteam.org
GAIN
Winisd Alpine Type R Box -- posted image.
GROUP DELAY
Winisd Alpine Type R Box -- posted image.
PHASE PLOT
Winisd Alpine Type R Box -- posted image.
SPL
Winisd Alpine Type R Box -- posted image.
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...
aznboi3644 
Gold - Posts: 2,600
Gold spaceThis member consistently provides reliable informationspace
Joined: May 01, 2006
Location: United States
Posted: June 21, 2008 at 7:58 PM / IP Logged  
that should sound pretty good...I always like type R's in ported enclosures between 2.5 - 3 cu ft
mcben789 
Copper - Posts: 171
Copper spacespace
Joined: October 01, 2007
Location: Mississippi, United States
Posted: June 22, 2008 at 12:45 PM / IP Logged  
Alright thanks man...
Should I really expect around 110 db's out of that one 12"?
Sasquatch...
We know your legend's real...
stevdart 
Platinum - Posts: 5,816
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: June 22, 2008 at 2:22 PM / IP Logged  
Likely to be more than that due to cabin gain (if you set the system up to achieve such a goal, that is...).
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
mcben789 
Copper - Posts: 171
Copper spacespace
Joined: October 01, 2007
Location: Mississippi, United States
Posted: June 23, 2008 at 8:32 PM / IP Logged  
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...
stevdart 
Platinum - Posts: 5,816
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: June 23, 2008 at 8:42 PM / IP Logged  

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.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
mcben789 
Copper - Posts: 171
Copper spacespace
Joined: October 01, 2007
Location: Mississippi, United States
Posted: June 23, 2008 at 9:13 PM / IP Logged  
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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