This legendary bass subwoofer equipped behind the legendary JBL E155 Relve a study and design 100% JBL the late 70's.
This is actually Mr. DON KEELE Ingnieur consultant with JBL in these times (he also worked for Electro Voice) with his team that developed.
This box is an evolution of the basic concept created in 1954 to 1955 under the reference number C435 and C450 respectively in 4530 became 4520 and 1976 to 1977.
Regarding the company Stage Accompany this assembler actually manufactured under license JBL and Harman agreement of 4818 cases that were definitely the best "copies" that are still in service.
Following the establishment of the factory JBL / HARMAN Denmark SA broke all relations with JBL ...
It is obvious that the best banks were the original JBL 4818 factories in California.
I possdais 2 pairs of which I regret to spar renewed.Moreover our sound system, in recent n'tant more factories.
For over 20 years they "turned" with the 18 'JBL E155 food respectively by ALTEC LANSING 9440 (excellent and very powerful) a Amcron DC300 then a QSC PLX3002.
El sound n'tait happiness.