4’ x 12"concrete sewer line for bass

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   I heard years ago that someone had used 12 inch concrete sewer line ( NEW obviously) and mounted a 12" driver in it, for exceptional bass. It was only a rumor, of course. These lines come in 5 foot sections, so the cubic feet volume would be about right. Has anyone ever heard of this?

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ebg51 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 October 2005 Location: United States Status: Offline Points: 1	Post Options Post Reply Quote ebg51 Report Post Thanks(0) Quote Reply Topic: 4’ x 12"concrete sewer line for bass Posted: 27 October 2005 at 12:54pm
	I heard years ago that someone had used 12 inch concrete sewer line ( NEW obviously) and mounted a 12" driver in it, for exceptional bass. It was only a rumor, of course. These lines come in 5 foot sections, so the cubic feet volume would be about right. Has anyone ever heard of this?

Timber_MG Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 March 2004 Location: South Africa Status: Offline Points: 1454	Post Options Post Reply Quote Timber_MG Report Post Thanks(0) Quote Reply Posted: 27 October 2005 at 1:14pm
	look up nelson Pass's El pipeo (passlabs.com or summin, google is your friend). They use sono-tube used for casting concrete pillars.

ceharden Members Profile Send Private Message Find Members Posts Add to Buddy List The 10,000 Points Club Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851	Post Options Post Reply Quote ceharden Report Post Thanks(0) Quote Reply Posted: 27 October 2005 at 3:20pm
	I've often thought of recessing bits of concrete pipe into walls/floors for subs. Would have to watch for resonances tho, being a very regular shape.

Timber_MG Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 27 March 2004 Location: South Africa Status: Offline Points: 1454	Post Options Post Reply Quote Timber_MG Report Post Thanks(0) Quote Reply Posted: 27 October 2005 at 6:34pm
	dampen it and remember tha in a house there are other resonances too....often worse that the cabs'.

Tony Wilkes Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 02 August 2004 Location: West Midlands Status: Offline Points: 4835	Post Options Post Reply Quote Tony Wilkes Report Post Thanks(0) Quote Reply Posted: 28 October 2005 at 4:10am
	Back in the early days of Hi-Fi there were many designs based around the use of concrete pipes for enclosures. One of the most popular was for the Wharfedale Super 8" driver that was mounted with the pipe standing vertical and a reflector mounted so that the mid and treble from the whizzer cone was deflected horizontally. It would be pretty easy to put a baffle inside to breakup the standing waves if they proved to be a problem. Tony Edited by wilkee - 28 October 2005 at 4:11am

tb_mike Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 01 October 2004 Location: New Zealand Status: Offline Points: 2744	Post Options Post Reply Quote tb_mike Report Post Thanks(0) Quote Reply Posted: 29 October 2005 at 11:27pm
	The thing with a cylinder is it has one or two major resonance-they might just be out of band if you filter sharply.