I've got a 05 sedan w/Bose and I want to keep the stock HU. I'm planning to get Focal K2P because of all the great reviews I've been reading about them. I'm just wondering if the stock HU signal(pre Bose amp) is good enough or will it be a waste to use them with the Focal K2P? I will be using an Alpine PDX-5 to keep it all simple. Thanks.

 

IMO, the Bose HU output signal is good enough to use with the Focals. But your definition of good enough may be different.