Jensen Ultraflex redux

A few updates to the Jensen Ultraflex

Revised crossover + EQ/HF boost 

 The fixed resistor attenuator was inspired by the Jensen Duette crossover + recent knowledge gained in boosting frequencies above 7khz using an EQ network in my Altec 2-way XO experiments. Try it on your Heathkit SS1 or Eico HFS1 which AFAIK, used only a 2uf beeswax paper cap + L-pad.

Damping removed
paper in oil caps for
crossover and EQ

Happy Listening!

JE Labs Open Baffle redux

Original article

November 2008 Hi Fi Show

G. A. Briggs

Wharfedale SFB3

Stereo Sound "Tube Kingdom"
1996 Volume 3

JE Labs (cheap 😉) DIY version inspired by Stereo Sound
as featured
in Sound Practices issue 17 "JE Homebrewer"

JEL OB for Altec 755 built from
3/4" Birch plywood ca. 1997

Built using Tanguile 'tongue in groove'
 flooring planks for an Altec 605B 
November 2008 Hi-Fi Show

Mondrian 2011 edition
for a 12" driver 

Have fun and happy listening!