A VSEL cab, late 1968.

Made by the Gla-Rev company, perhaps originally for an AC100, but fitted out for a Supreme at the end of the Vox Sound Equipment Ltd era.




The cab when it first arrived. There were no back boards, and the AC100 wiring loom - yellow and green twisted wires - had been mangled. The capacitors fixed to the inside of the baffle by metal brackets are old work, but not original.



Details showing the stamped "G R" (Gla-Rev) on the shelf, the gold string round the cab, and the double pin corners.



The drivers are Celestion alnico T1096s - 15ohm versions of the T1088, approximately 20W handling. All are marked "JA" on the magnet. Three have gold-coloured frames, one silver. The silver-framed unit (first three pics above) was blown and needed reconing. The date on its gasket is: 11JM, which should mean 11th September 1967. The other three speakers have codes stamped on the frame: "T1096, 12JA", which should mean 12th September 1968. A cab in Denmark also has T1096s.



In order to get the cab working three or so years ago, red and black twisted wire was worked in as a stop-gap, and new back boards made.


It seemed best recently, however, to rewire the cab in its entirety (and set the original sections of the loom aside).



Above, rewiring in progress. The capacitors are new-old-stock Aerovox oil-filled units, 2uf, 600v. The fixing lugs lined up perfectly with the holes drilled for the original capacitor blocks. Straight runs of green and yellow wire seemed the best way to proceed.


Note the blind aluminium rivet nuts added for the back board screws. Many of the original T-nuts (on the inside of the runners and still covered over with original wooden strips) had been cross-threaded. It seems likely that at some point a new (solid) closed back had been made for the cab.




The wire is 18AWG (made by Alpha), and fixed in with 3/8" Challenge insulated staples (as used in AC100 cabs).



Click for a larger downloadable image


The wiring scheme is the standard one adopted for the larger Vox cabs (AC100, 7120) from 1966. The circuit is relatively straightforward: a series/parallel arrangement for the speakers, with the Midax horns over the top. The 2uf capacitors filter out the low frequencies, protecting the horns from excesses of bass.


The arrangement is clever. If either or both of the horns fail, all four speakers remain in circuit. In addition, if one pair of speakers fails, the other remains active, though the impedance of the cab in this instance rises to 32ohms.




The backboards screwed in, and little logos (photo printed) loosely attached to the upper pair of speakers just for show. Note the position of the XLR connector. I have no clue, three years on, why I put it there.




The cab is now mounted in a Super Beatle trolley, which arrived with an ancient "Consolidated Airlines" sticker attached to one of the top bars, perhaps indicating it had once belonged to a touring band. The Supreme amp in the picture is serial no. 1094.




The cab sounds pretty darn good, and perhaps better in the trolley than on the floor - some unquantifiable "decoupling" effect, or maybe just a subjective feeling. But Celestion T1096s, whatever one says about "trolley" or "no-trolley", are great speakers and so much easier to drive than their ceramic counterparts.