For sale is my Cactus Green Avantgarde Duo 3.1 with Nextel 225 subs, with custom solid brass stands, custom modified external crossover, and 11.5 ft of bi-wired Kondo copper speaker cable. The brass stands weigh approximately 200 lbs each and add stability/dampening relative to the stock stands. The external crossover, housed in birds-eye maple, has the same specs as factory, but with upgraded components. The Kondo copper is hard-wired to the midrange and tweeter drivers. The crossovers must be within approximately 2 ft of your amplifier. The Duos are 103 db efficient, so they are SET-amplifier friendly. This model does not have the Omega drivers. I am the second owner since mid-2005. Minor blemishes here and there as to be expected, but I have taken fastidious care of them (conservative 7, arguably an 8). Original stands, instruction manual, factory crossovers, Cardas jumpers, original shipping boxes will be provided. Local delivery strongly preferred. I will meet the purchaser within 150 miles of zip code 60045 to deliver, saving you $300 or more in shipping cost, and me the aggravation of packing/shipping.