Hey!

I've got an amp from the 80s-90s something.
The input is just simply draw the cables that normaly go into a speaker to the amp

My question is if i split it up so one of the speaker connections ive got on my stereo goes to both a speaker and the amp,
will the amp and the speaker split to use 25w eatch or does the amp use less?

i'm not really sure what you are saying.

are you asking if you can wire the head units wires and the amps wires to a single speaker?

Ill try to explain it better,
On the picture you can see the inputs RR, RF, LR, LF, battery, ground, remote
The RR - LF inputs are as we call them in Sweden Highlevel inputs.
My question is if i use a 50w speaker connection to all 4 of the inputs + 1 speaker
Then there are 5inputs total for the current to go my question is how will it split up between these 5inputs

so you're asking how the output will be split up if you put 5 speakers on a 4 channel amp?

also is that a blaupunkt quadro bqa 107?

That is a blaupunkt BQA 107 ive got 2 want one ^^

Im extremly sorry for my bad explaining.
Ill just post a paint of what im considering doing
If you dont understand it now, I'll do my best using a pen & paper ^^

so you're wanting to use the head units power for 3 of the speakers and the blaupunkt amp for one of them?

also that wiring on the amps output won't work. at most you can tie 2 of the channels together per speaker.

IMO, spend 100-125... Get a small amp for the 2 8" subs, then get a smaller one for the speakers.

I know that's not what you are asking, but it may cause more relief than stress in the long run.