Another nested basshorn design

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   This design has a large front cavity to eliminate the dip above Fc for a small horn mouth. 

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_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Topic: Another nested basshorn design Posted: 30 October 2007 at 1:48am
	This design has a large front cavity to eliminate the dip above Fc for a small horn mouth.
	djk

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 30 October 2007 at 1:50am
	By sectioning the cabinet at the line, and adding a hinge where shown, the cabinets will nest for hauling eight in a standard cargo van (4'x4'x8'). Edited by _djk_ - 30 October 2007 at 8:10am
	djk

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 30 October 2007 at 1:51am
	Fold out the wedge, and this is how they would set-up. Edited by _djk_ - 30 October 2007 at 1:52am
	djk

hifiger Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 17 October 2006 Location: Canada Status: Offline Points: 82	Post Options Post Reply Quote hifiger Report Post Thanks(0) Quote Reply Posted: 30 October 2007 at 5:03am
	looks like a really space efficient design!

tommysb Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 24 April 2006 Location: Finland Status: Offline Points: 1036	Post Options Post Reply Quote tommysb Report Post Thanks(0) Quote Reply Posted: 30 October 2007 at 8:49am
	that setup negates the need for a large rear chamber to compensate for the small mouth, the mouth looks decidedly large!

Disco Stu Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 March 2005 Location: United Kingdom Status: Offline Points: 2487	Post Options Post Reply Quote Disco Stu Report Post Thanks(0) Quote Reply Posted: 30 October 2007 at 12:07pm
	My kind of horn - so thats a 40Hz horn length? Only problem is the requirement for a plate over the mouth area Stu
	All you need to know is: Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches

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: 31 October 2007 at 4:00pm
	Just stack enough that it no longer really matters :)

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 01 November 2007 at 1:49am
	A 2x2 stack is about 8' tall, you won't get much more output with a top plate.
	djk

mykey Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680	Post Options Post Reply Quote mykey Report Post Thanks(0) Quote Reply Posted: 01 November 2007 at 4:42am
	Your gonna have to put a guard rail up to stop bass heads standing in them I'd like to hear these when they're done its getting exiting now what with your design and Levs etc, bout time too. Edited by mykey - 01 November 2007 at 5:57am

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 01 November 2007 at 9:53am
	The basic design and drawings are by Bill Woods, a commercial horn designer with 30+ years experience. My contribution is the nesting scheme.
	djk

pgolde Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 06 September 2006 Location: United States Status: Offline Points: 17	Post Options Post Reply Quote pgolde Report Post Thanks(0) Quote Reply Posted: 10 November 2007 at 8:33pm
	What driver was this horn designed for?
	pg

_djk_ Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002	Post Options Post Reply Quote _djk_ Report Post Thanks(0) Quote Reply Posted: 11 November 2007 at 1:26am
	Kind of a 15" version of the Lab 12 driver. Fs in the low 20s, Vas over 10 cu ft, Qts 0.30~0.40, high x-max. The original driver was only about 92dB as a direct radiator, and came up to 100dB in the horn. One pair stacked would be about 105dB/2.83V/1M below 50hz. Four stacked as in the drawing ought to be close to 110dB/2.83V/1M. The reason for posting it here was mainly conceptual. In practice I would adjust the back chamber and throat cavity for the driver under consideration, and probably simplify the corner reflectors.
	djk