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| Date: |
February 13, 2008 at 02:40:04 |
| From: |
aaron , [c-67-190-125-205.hsd1.co.comcast.net] |
| Subject: |
Re: Why is this so hard? |
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When I started designing my sub I was looking at a Qtc of .7 but as I
put in more and more numbers into WinISD I started leaning towards a
higher QTC usually approaching 1.0. This does mean I have to settle a
less flat freq response curve because of a 1 dB hump, but it also drops
the low cutoff by about 10 Hz.
I am also planning on building a front box for the sub so that it can be
converted into a 4th order bandpass that would ideally cover 20-60Hz
or 25-70Hz, so the sealed box parameters also need to work well as
the rear box for the 4th order. The drivers that produced the results
that I was looking for were usually fairly high Qts, around between .6
and .8. One driver that was preset in WinISD that looks real good for
for both boxes is the Sound splinter RL-M12 which only has a Qts of
0.601. Unfortunately the front box is 26.06 with a vent length of 63
cm.
Currently the best results that I could generate with a driver that I
could find for sale were from the Sound Stream PWS. I'm looking at a
sealed box of 124L and a front box of 60L, but I think I'm willing the
sacrifice some living space.
I am no expert in sub design, so if there is anything that I should be
warned about with my current designs please let me know. I haven't
calculated the power response for any of these drivers yet. I hope that
doesn't turn the whole project on it's head.
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Posted with TalkShop version
2.76 BETA |
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