went to down load and it ask for Qtc. Manual dosen't list it. just Qts.
Fs-32Hz
Qts-0.72
Qes-0.83
Qms-5.397
Vas (Cu.Ft.)-2.26
Vas (Liters)-63.99
Re-1.5ohms
Le-0.43mH
Mmd-126.5 grams
Xmax- +/-8mm
RMS-400 watts
Sd-480 sqcm
Freq. Resp.-20Hz-500Hz
Efficiency (2.8V)-92.7
EBP-39
Displacement- 0.23Cu.Ft.
can someone please run this and let me know what size box I need to build for these subs. Thanks, I hate to be so stupid.
Fs-32Hz
Qts-0.72
Qes-0.83
Qms-5.397
Vas (Cu.Ft.)-2.26
Vas (Liters)-63.99
Re-1.5ohms
Le-0.43mH
Mmd-126.5 grams
Xmax- +/-8mm
RMS-400 watts
Sd-480 sqcm
Freq. Resp.-20Hz-500Hz
Efficiency (2.8V)-92.7
EBP-39
Displacement- 0.23Cu.Ft.
can someone please run this and let me know what size box I need to build for these subs. Thanks, I hate to be so stupid.
No matter, your enclosure makes much more difference.how many subs and what kind of car?
ported:
just make the box between 2.25-2.75 cuft
with 14"-16" of port area per cubic foot.
start the port length at around 22" and keep cutting off 1 " at a time until its loudest. 16"-18" port length is just about right for most subs.
this is the way competitors do it.
ported:
just make the box between 2.25-2.75 cuft
with 14"-16" of port area per cubic foot.
start the port length at around 22" and keep cutting off 1 " at a time until its loudest. 16"-18" port length is just about right for most subs.
this is the way competitors do it.
Skooter asked:
Qtc is the resulting system Q of speaker+box combined.
Therefore, you have to specify what Qtc you want before box size can be determined.
Smaller box = higher Qtc
And Skooter said:
Obviously my post is moot at this point. But just for reference, from the parameters you posted:
Subtracting 0.23 cu ft per speaker from the 2.7 leaves 1.12 ft per speaker.
In that size box, your Qtc (theoretically) will be 1.25. This is a little high for some folks, but works well for rock and metal IME. What it means is that you will have a couple of dB rise in frequency response around the system resonant frequency. In this case that will be about 55Hz.
Your -3dB cutoff (in free space) would be about 40 Hz.
The confined space of the car will add quite a bit of low end boost, and you should be happy with the results.
Good luck and have fun building!
Tim
Qtc is the resulting system Q of speaker+box combined.
Therefore, you have to specify what Qtc you want before box size can be determined.
Smaller box = higher Qtc
And Skooter said:
Obviously my post is moot at this point. But just for reference, from the parameters you posted:
Subtracting 0.23 cu ft per speaker from the 2.7 leaves 1.12 ft per speaker.
In that size box, your Qtc (theoretically) will be 1.25. This is a little high for some folks, but works well for rock and metal IME. What it means is that you will have a couple of dB rise in frequency response around the system resonant frequency. In this case that will be about 55Hz.
Your -3dB cutoff (in free space) would be about 40 Hz.
The confined space of the car will add quite a bit of low end boost, and you should be happy with the results.
Good luck and have fun building!
Tim
Good to hear a positive reply! My music normally consists of rock and roll, steve miller, motley crue, don henley, corn, metalica, cure, billy squire, 75% of the time. then I have some of the newer r&b stuff that is out. and I like to listen to instimental stuff like kraftwerk and some pink floyd too! but thanks for the input!!
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