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Original Message

Early Avantgarde Unos and Duos - Ditching the Scaffolding

Posted by cawson@onetel.com on June 4, 2019 at 08:55:58:

I've never liked the 3-upright pole method used by Avantgarde to support the horns on my Unos - it is positively ugly and looks somewhat Heath Robinson in appearance - so many years ago I bought from AG a set of 8 curved shims that they use on Trios to fix the tweeter horns to 2 uprights. These allowed me to ditch the round upright and clamp both tubes directly to the remaining 2 square uprights. A big improvement in appearance, although the horns were not dead centre above the subs.
Recently I've been working on a scheme to get rid of all the scaffolding and the result is shown here. Although the new brackets were designed for my Unos, the keen-eyed will notice these photos are of Duos. The brackets did not require any modification and now support the horns of my recently acquired Duos.
I've been careful to maintain (and in fact improve) vibration absorbsion using rubber bobbins (as AG use) and by supporting the horn tubes on Sorbothane pads. Apart from the new F-shaped brackets, most of the fittings come from the left-over box of bits saved from dismantling the Duos.
The horns are in identical positions in terms of height (middle holes in the old uprights) and the distance from the listener compared with the subs. They are rotated 90 degrees but that won't affect the sound, and they are restored to dead centre above the subs. Unlike the standard supports, I can easily adjust the angle of the horn tubes a degree or two up or down. The frame acts as a cable tidy too, so both the incoming cables and jumpers can be completely hidden from the listening position.
Rather than use spikes which are only 9" apart on SUB217s and SUB225s, I've added stability with nice angled brackets fixed to the bottom of the subs and I've fitted these with Iso Acoustic Gaia feet. Small black plastic caps on order to plug the redundant threaded holes in the sub cabinets.
What do other Uno / Duo owners think? I'm quite chuffed with the results - these old speakers now look much younger and have taken on a new lease of life.