i'm putting together an all altec system and so far i have a pair of 604b's ( i need 1 crossover ) , a pair 440b preamps , and a pair of 871 enclosures and a 306 am/fm tuner, all cabinets are the blonde finish (enclosures , preamps and tuner)....i would really love to find a pair of a340a power amps to complete the deal .........any help regarding the amps or crossover would be much appreciated !.......thanks , rocket