If I understand what you are asking. The subs do not need both channels. Send the left channel to the left sub and the right channel to the right sub. If each sub needs both inputs to have signal than use a Y cord at the input (its been a long time since I have seen a sub that needs both inputs with signal.)
Use the corresponding high freq output to continue to the amp for that channel.
As far as sound quality I can only speak to my results with my 300b based SET amp. So far I have not been able to find a crossover that is step back when feeding my 300b. I've tried the internal crossover of the sub, which is very poor sound quality. A seperate discrete SS unit, definitley better but than it sounds like a good SS amp instead of a SET amp. Lastly an integrated circuit based unit, which is suprisingly a little better then the discrete SS unit but still leaves me without the midrange magic and top to bottom cohesiveness of the SET amp.
Ofcourse YMMV.
I'm currently trying to find a SET based tube crossover that will get the job done in my system.
Use the corresponding high freq output to continue to the amp for that channel.
As far as sound quality I can only speak to my results with my 300b based SET amp. So far I have not been able to find a crossover that is step back when feeding my 300b. I've tried the internal crossover of the sub, which is very poor sound quality. A seperate discrete SS unit, definitley better but than it sounds like a good SS amp instead of a SET amp. Lastly an integrated circuit based unit, which is suprisingly a little better then the discrete SS unit but still leaves me without the midrange magic and top to bottom cohesiveness of the SET amp.
Ofcourse YMMV.
I'm currently trying to find a SET based tube crossover that will get the job done in my system.