Yes, you need to double your cables.
In a non-biamped system, the same cable carries highs and lows. With the active crossovers, you have a separation of the highs and lows, with each being amplified separately. You need a separate cable for the highs and the lows.
K20 is for single wiring. You need to double it.
I would suggest one of two alternatives in terms of appropriate quality and cost effectiveness.
The first is to buy another set of K20s to go with what you have. So you would have two K20 cables going to each of the five speakers. (You said that you already have your rear Keilidhs biwired. So you may not need to buy another set for these.)
The second alternative is to sell the K20 and use K400 cable. it's basically two K20 cables put together in a single jacket. A little less clutter. With this, you would have one K400 cable going to each of the five speakers. K400 is pretty good cable at a reasonable price and is made to match with Linn.
I would be very happy to have your set-up.
In a non-biamped system, the same cable carries highs and lows. With the active crossovers, you have a separation of the highs and lows, with each being amplified separately. You need a separate cable for the highs and the lows.
K20 is for single wiring. You need to double it.
I would suggest one of two alternatives in terms of appropriate quality and cost effectiveness.
The first is to buy another set of K20s to go with what you have. So you would have two K20 cables going to each of the five speakers. (You said that you already have your rear Keilidhs biwired. So you may not need to buy another set for these.)
The second alternative is to sell the K20 and use K400 cable. it's basically two K20 cables put together in a single jacket. A little less clutter. With this, you would have one K400 cable going to each of the five speakers. K400 is pretty good cable at a reasonable price and is made to match with Linn.
I would be very happy to have your set-up.