Compensate for magnet size in a TH?

screamersusa · 28th December 2011, 03:21 AM

This could be a very silly question..

It dawned on me that with the 3015lf in a TH, the magnet structure size was not much of an issue. Since we now have to switch to the Kappa 15lfa or other large ferrous magnet speaker, should we compensate for the lost volume and obstruction in the horn? And if so...how?

m R g S r · 28th December 2011, 04:13 AM

i think that the end of the driver (magnet) is close enough to the exit of the horn mouth that it really doesn't make a HUGE difference.

chris661 · 28th December 2011, 10:26 AM

You'd make S3 slightly bigger, which is a fair size re-do of the design.

The subwoofers in my signature were originally built with a driver of similar problem to what you describe. The measurements are a few pages into the thread, but they appear to correlate closely to what the simulations show.

Chris

28th December 2011, 03:21 AM	#1
screamersusa diyAudio Member Join Date: Jun 2005 Location: Florida	Compensate for magnet size in a TH? This could be a very silly question.. It dawned on me that with the 3015lf in a TH, the magnet structure size was not much of an issue. Since we now have to switch to the Kappa 15lfa or other large ferrous magnet speaker, should we compensate for the lost volume and obstruction in the horn? And if so...how?

28th December 2011, 10:26 AM	#3
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 7	You'd make S3 slightly bigger, which is a fair size re-do of the design. The subwoofers in my signature were originally built with a driver of similar problem to what you describe. The measurements are a few pages into the thread, but they appear to correlate closely to what the simulations show. Chris __________________ "Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo My setup: http://www.diyaudio.com/forums/multi...tang-band.html

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28th December 2011, 04:13 AM	#2
m R g S r diyAudio Member Join Date: Jan 2011	i think that the end of the driver (magnet) is close enough to the exit of the horn mouth that it really doesn't make a HUGE difference.

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