ctrrap
08-31-2007, 01:19 PM
New to forum hope Im doing this right and in the right spot
These were said to have been kit built by a University of Iowa physics professor in 1956 they were a course project. The d130 is unmistakable through the cloth but also has a tweeter and mid horn. I have not had them open but the grandson has pictures of the build and he too swears he has never opened them. It has a jbl crossover 2way on the rear but also has hand spun internal crossover with an external 8-position switch to activate the various options. He said he course goal was to reproduce orig. sound of a symphony to stage music hence the various crossover options. The cases weigh about 95lbs and appear to be burled walnut with a degreed oak face panel. I have a link to a small clip but my camera is very cheap so keep that in mind. Sound levels on a single ended 6bq5 amp are incredible. I bought them very cheap by running a wanted ad on our local Craigslist. They are bottom vented and the foot matches the curve of the lower cabinet. Dont know if they will stay as my wife is already complaining about thier size and lack of corners to put them in.
here is a clip of them working:
http://www.trrap.com/downloads/jbl.MOV
These were said to have been kit built by a University of Iowa physics professor in 1956 they were a course project. The d130 is unmistakable through the cloth but also has a tweeter and mid horn. I have not had them open but the grandson has pictures of the build and he too swears he has never opened them. It has a jbl crossover 2way on the rear but also has hand spun internal crossover with an external 8-position switch to activate the various options. He said he course goal was to reproduce orig. sound of a symphony to stage music hence the various crossover options. The cases weigh about 95lbs and appear to be burled walnut with a degreed oak face panel. I have a link to a small clip but my camera is very cheap so keep that in mind. Sound levels on a single ended 6bq5 amp are incredible. I bought them very cheap by running a wanted ad on our local Craigslist. They are bottom vented and the foot matches the curve of the lower cabinet. Dont know if they will stay as my wife is already complaining about thier size and lack of corners to put them in.
here is a clip of them working:
http://www.trrap.com/downloads/jbl.MOV