Amplifier connection doubts

Very wenas I have a radius Blaupunkt and Kisiera co -enter it to a amplifier of the same brand but I kE my radius cd does not have a rca output and I like to know if when putting the adapter I would lose that exit for the speaker or could it do the 2 things ????

It is possible to continue using them only if you connect the converter from the inside of the stereo, that is, directly in the circuit tablet but this is a bit complicated to do if you do not have knowledge and the tools, can you still connect the horn although it could be heated too much the stereo, what model is your stereo and your amplifier? Maybe your amplifier has high input.
I imagine K you want to continue using the Estero outputs because the amplifier is only for the bass, isn't it? luck.

It is all Blaukpunt and has an impedance of 4 ohms per clear if when the cable of a speaker is carried to the amplifier with the adapter and and lost a speaker and the amplifier only has 2 channels and it would use it for a subwoofer and 2 speakers in trunk plus logo keria ke the radius cd alimnetara to the 4 speakers of the interior of the interior of the coxe

Put out output multipliers, and only allows the connected amplifier and from this draw the connection for the Sub, in the audio houses you can ask for more information you tell you I want this for this and already, anyway you can multiply without losing power.

Muxas thanks if I have more doubts, I'll tell you thanks Bs