06-08-09: PrcinkaNow *that* is a good horn-based speaker. The isolation of the horn from the woofer cabinet may have helped some. Scan of brochure (pics & specs) here. I prefer a lower crossover point from a 15" speaker, but if it works, it works.
Altec model 19 are the best horn speakers for home use I have had. Better than Klipsch and JBL(unless you want to go for 4344 and multi amp...)With good tube amps the Altec 19 is un-beatable...
Altec made a sealed woofer version of the VOTT for home use called the 878B Santiago. They also made an unfinished birch version of this speaker (or similar) at a lower cost.
The VOTT-based home speakers were generally good to excellent. The 890C is not in that category, in design, components, or performance.