Tweakjunkie - A serious upgrade coming to a pair of the most famous / popular speaker ever made, the JBL L-100. This upgrade absolutely transforms this speaker into something that is nothing
JBL 4311 Loudspeaker System Manual | HiFi Engine
JBL L100 Crossover Upgrade at Audio Nostalgia (With Measurments)
JBL 4311 Crossover Wiring & Foilcal Help Please | Audiokarma Home Audio Stereo Discussion Forums