Aleromod.com - View Single Post

AleroB888 · 07-25-2014, 04:22 PM

The thing is, if in fact the peak bass output is around 40 hz and drops off below that with an f3 of about 28hz, this project result does appear to closely follow a known alignment. (I know the O/P used a higher box volume, but that can work better in practice).

If you compare the manufacturer's specs with the data in the chart, it tracks well with the predicted ratios for a No. 7 C4 vented box.

Total Speaker Q Value (Qts): .489
Free Air Resonance (Fs): 37.9 Hz
Equivalent Compliance (Vas): 27.38 liters
Suggested Box Volume (VB): 1.50³ ft

NO. 7. Type .....C4
Ripple.... 0.13 dB
f3/Fs........ 0.729
fB/Fs.......0.829
VB/Vas......1.372
Qt..............0.466

Not only that, I think for normal music input, around 40 hz is a good place to have strong output. I'll bet that system rocks! Anyway, the O/P built a solid vented system that has to be considered a success.

07-25-2014, 04:22 PM	#115
AleroB888 GLS member Join Date: Nov 2007 Location: Fort Knox area, KY Posts: 2,120	The thing is, if in fact the peak bass output is around 40 hz and drops off below that with an f3 of about 28hz, this project result does appear to closely follow a known alignment. (I know the O/P used a higher box volume, but that can work better in practice). If you compare the manufacturer's specs with the data in the chart, it tracks well with the predicted ratios for a No. 7 C4 vented box. Total Speaker Q Value (Qts): .489 Free Air Resonance (Fs): 37.9 Hz Equivalent Compliance (Vas): 27.38 liters Suggested Box Volume (VB): 1.50³ ft NO. 7. Type .....C4 Ripple.... 0.13 dB f3/Fs........ 0.729 fB/Fs.......0.829 VB/Vas......1.372 Qt..............0.466 Not only that, I think for normal music input, around 40 hz is a good place to have strong output. I'll bet that system rocks! Anyway, the O/P built a solid vented system that has to be considered a success. __________________ 2003 GL MP62 supercharged / 2004 GLS stock http://www.youtube.com/watch?v=hpVYZPbpPzk Last edited by AleroB888 : 07-25-2014 at 04:56 PM.