Waldorf related

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Gave my drafts to a Lansing forum member. Here's currently building a pair of 18" Waldorf.

http://www.audioheritage.org/vbulletin/showthread.php?31407-Richard-Long-s-Waldorf-restoration&p=329067&viewfull=1#post329067

Edited by Lee In Montreal - 20 February 2012 at 7:08pm

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Lee In Montreal Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345	Post Options Post Reply Quote Lee In Montreal Report Post Thanks(0) Quote Reply Topic: Waldorf related Posted: 20 February 2012 at 7:01pm
	Gave my drafts to a Lansing forum member. Here's currently building a pair of 18" Waldorf. http://www.audioheritage.org/vbulletin/showthread.php?31407-Richard-Long-s-Waldorf-restoration&p=329067&viewfull=1#post329067 Edited by Lee In Montreal - 20 February 2012 at 7:08pm

burningbush Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897	Post Options Post Reply Quote burningbush Report Post Thanks(0) Quote Reply Posted: 21 February 2012 at 4:32pm
	Watching closely.
	music is the message

JR.junior Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789	Post Options Post Reply Quote JR.junior Report Post Thanks(0) Quote Reply Posted: 21 February 2012 at 4:37pm
	+1
	Support the scoop technology, larger mouth plays louder!

Lee In Montreal Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345	Post Options Post Reply Quote Lee In Montreal Report Post Thanks(0) Quote Reply Posted: 23 February 2012 at 1:01pm
	I can't wait to take measurements. I expect the same kick as a JBL 4530, a much lesser dip at 120Hz as well as more bass from 30-80Hz than even JBL's 4520 because of the much larger rear chamber and larger mouth at almost 75% bigger (41" x 38" versus 33" x 27" = 1558sq.inch versus 891sq.inch) Sure it will be big. ;-)

JR.junior Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789	Post Options Post Reply Quote JR.junior Report Post Thanks(0) Quote Reply Posted: 23 February 2012 at 1:44pm
	'cos of bigger chamber, you had to put more energy into drivers, to get decent compression at the horn thorat.
	Support the scoop technology, larger mouth plays louder!

infrasound Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 13 May 2011 Location: Brizzle Status: Offline Points: 2276	Post Options Post Reply Quote infrasound Report Post Thanks(0) Quote Reply Posted: 23 February 2012 at 2:04pm
	Where is it crossed over? you know you want to smooth the first 90deg bend more

Lee In Montreal Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345	Post Options Post Reply Quote Lee In Montreal Report Post Thanks(0) Quote Reply Posted: 23 February 2012 at 10:36pm
	That's an old draft. The latest version has a very smooth bend. Also, the newer version has an hyperbolic progression, while the one shown on top is exponentiel. Lee Edited by Lee In Montreal - 23 February 2012 at 11:23pm

JR.junior Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 14 December 2009 Location: Slovenija Status: Offline Points: 1789	Post Options Post Reply Quote JR.junior Report Post Thanks(0) Quote Reply Posted: 24 February 2012 at 6:37am

	Support the scoop technology, larger mouth plays louder!

Lee In Montreal Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345	Post Options Post Reply Quote Lee In Montreal Report Post Thanks(0) Quote Reply Posted: 28 February 2012 at 9:16pm
	Some progress. The scoop portion will be laminated in place with the proper shape. Edited by Lee In Montreal - 28 February 2012 at 9:17pm

mykey- Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 03 March 2010 Location: ID/UK Status: Offline Points: 6114	Post Options Post Reply Quote mykey- Report Post Thanks(0) Quote Reply Posted: 29 February 2012 at 2:22am
	Nice Lee

rich, ind.st Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 14 January 2005 Location: United Kingdom Status: Offline Points: 1096	Post Options Post Reply Quote rich, ind.st Report Post Thanks(0) Quote Reply Posted: 29 February 2012 at 3:00am
	whoever's building these is going to be grinning like a ... for the foreseeable. got a driver out of the half decware versions i built so will take some photo's tomorrow of as much of the internals as you can see, this version definitely has more care taken on the corner reflectors/general expansion. looks to be about half the chamber volume on these which would make sense with them being used as a kick bin above the berthas i suppose.
	music is god

Lee In Montreal Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 March 2011 Location: Montreal Status: Offline Points: 345	Post Options Post Reply Quote Lee In Montreal Report Post Thanks(0) Quote Reply Posted: 29 February 2012 at 5:55pm
	There's a lost volume under the rear chamber, even in the original Waldorf. It is sealed and not used. And it has been built yet. But I suggested my friend to make removable separators just to test the difference between a regular and an extended rear chamber. BTW Even with the regular (smaller) rear chamber, volume is perhaps three times as what it is for a JBL 4520 The lower scoop is built using four members with the proper exit shape, on which kerfed plywood will be glued and nailed. Exemple of what kerfing can produce in term of shaping... Edited by Lee In Montreal - 29 February 2012 at 5:55pm