sub tunning

perpetual · 20th June 2005, 02:28 AM

Is it bad to tune your sub below the driver's fs?

What are the possible consequences?

Collo · 20th June 2005, 10:21 AM

Not at all!

In fact that's exactly how a bass reflex box gets its extension.

The main thing to watch is cone excursion below the tuning frequency. Use a good modelling program. I suggest WinISD which is free from Linearterm at http://www.linearteam.dk/

richie00boy · 20th June 2005, 11:06 AM

Actually a normally aligned vented box will never tune below Fs. Tuning below Fs can result in increased distortion, but with a high quality driver with linear (surround) travel this is not so much of an issue.

Mikey p · 20th June 2005, 11:07 AM

Tuning a subwoofer below its fs protects the sub from "unloading" at any frequency above the tuning point, but at the exspense of output.

20th June 2005, 02:28 AM	#1
perpetual diyAudio Member Join Date: Mar 2005 Location: NY	sub tunning Is it bad to tune your sub below the driver's fs? What are the possible consequences? __________________ My DIY projects

20th June 2005, 10:21 AM	#2
Collo diyAudio Member Join Date: Nov 2004 Location: Newcastle, Australia	Not at all! In fact that's exactly how a bass reflex box gets its extension. The main thing to watch is cone excursion below the tuning frequency. Use a good modelling program. I suggest WinISD which is free from Linearterm at http://www.linearteam.dk/ __________________ Ports rule!

20th June 2005, 11:06 AM	#3
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Actually a normally aligned vented box will never tune below Fs. Tuning below Fs can result in increased distortion, but with a high quality driver with linear (surround) travel this is not so much of an issue. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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20th June 2005, 11:07 AM	#4
Mikey p diyAudio Member Join Date: Feb 2004 Location: Sask. Canada	Tuning a subwoofer below its fs protects the sub from "unloading" at any frequency above the tuning point, but at the exspense of output.

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