Help with 4 terminal speakers - what are they?

Thank you. Would that be something on the speaker itself? I'll have to take a look.

Can't see any small box near the speaker. Under dash there is a larger grey fused box along with a couple of other small black fused boxes.

Since I'm going to need to buy new speakers anyway are there any 5.25" that come with the 4 terminals on them? That would make for a simple plug n play repair? Any recommendations?

The head unit is an Alpine CDM 7274.

Thanks again for the help guys.

C

Ok so I spoke with a guy at a local electronics retailer and he says they really do not sell speakers anymore that have the bi-amp, 4 terminals on them. So I asked what do I do to replace speakers that have the bi-amp connections and he said just join the existing + with + and - with - and then connect to the two terminals on the new speaker.

Does that sound right?

C

Really weird. The head unit (Alpine CDM 7274) is using the standard plug in connector for the speakers which according to the diagram in the manual is just 'SPKR RF + and -' etc for 4 speakers. So from the connector off the head unit the wires run out a few inches and then there are 2 in-line crimp type connectors per speaker that continue on and run down and under the floor then back up on the Port side where they change to speaker wire. I cannot find any external crossovers etc that change this to a 4 wires per speaker application yet there are 4 wires at the speaker. Part of the wire run is down the side which is concealed and I can't see it. I'm thinking they would not be able to put any crossovers down there, that would be more of a typical wire fish application.

Perplexed.