Bass Horn Question

lpd · 5th February 2006, 06:09 AM

I have a pair of Bass Horns I picked up for free from a lady who wanted them removed from her home. They seem to be decent build quality, but need to be cosmetically refreshed. Drivers used in them are Philips 12" drivers with foam surrounds, and one of them is acting problematic in the horn as the foam surround is rotting and the cone pushes too far forward thus vibrating on the baffle. I am looking for ideas on replacement drivers, but have little experience with cabiney specs ect.

Here are some measurements:

Internal measurements are 16" deep 24" high and 11" deep
Horn flare is 17.5" wide and 18" high and 11" deep
Inside measurement of horn flare is 12" high and 6" wide
The port on the top is 8" wide 2.5" high and 11.5" deep (it port from either side of the horn inside the cab.

Any ideas for a decent 12' speaker for sub bass?

AndrewT · 5th February 2006, 07:39 AM

Hi,
I think you have a mid horn, judging by the length and flare rate of the front horn.
Compare this to a Tannoy Westminster. http://www.tannoy.com/WestminsterRoyal
The front horn looks a little similar and Tannoy claim it cuts off at about 200Hz. The rear horn then takes over all the way down to 18Hz but needs an enormous 530litre cabinet to achieve this.
No ideas about a replacement.

lpd · 5th February 2006, 04:06 PM

The Westminster uses a 15" driver. Mine uses a 12" one. I wonder what effect the difference in driver size will have on the cabinet size? They do look similiar in design, but not cosmetics thats for sure

Cal Weldon · 6th February 2006, 07:18 PM

Something like this Selenium might just drop in. Can you measure the centre to centre on the mounting holes?

http://www.partsexpress.com/pe/pshow...=264-343&DID=7

5th February 2006, 07:39 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I think you have a mid horn, judging by the length and flare rate of the front horn. Compare this to a Tannoy Westminster. http://www.tannoy.com/WestminsterRoyal The front horn looks a little similar and Tannoy claim it cuts off at about 200Hz. The rear horn then takes over all the way down to 18Hz but needs an enormous 530litre cabinet to achieve this. No ideas about a replacement. __________________ regards Andrew T.

6th February 2006, 07:18 PM	#4
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Something like this Selenium might just drop in. Can you measure the centre to centre on the mounting holes? http://www.partsexpress.com/pe/pshow...=264-343&DID=7 __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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5th February 2006, 04:06 PM	#3
lpd diyAudio Member Join Date: Nov 2003 Location: BC	The Westminster uses a 15" driver. Mine uses a 12" one. I wonder what effect the difference in driver size will have on the cabinet size? They do look similiar in design, but not cosmetics thats for sure

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