Came across some old Arcam speakers (cut open) and using the parts to build a bluetooth speaker box. Only problem is I can't figure out the wiring on the crossover/filter. The original speakers are pretty old so Google didn't help much.

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Image of component side enter image description here

Have a 2-channel audio amp board and trying to split the signal to one tweeter and one mid on each side.This is what I'm trying to achieve: enter image description here

So question is: does anybody know what the cables are, and how can I cut/solder to achieve my goal?

  • \$\begingroup\$ Any idea where the various wires previously connected? \$\endgroup\$
    – mike65535
    Commented Nov 19, 2018 at 18:52
  • \$\begingroup\$ @mike65535 Sorry, have no idea where the cables went. All I know is that the speaker case had 4 inputs, so 4 cables went from the input to the crossover \$\endgroup\$
    – ChrVik
    Commented Nov 19, 2018 at 19:05

1 Answer 1


I'd say that connections 1 and 5 ("I") are inputs. There's a notation on the board that the input is "bi-wire" (presumably to support a bi-amp configuration).

All of the connections labeled "E" are common connections.

The connection labeled "T" goes to the tweeter. This half of the board is configured as an LC high-pass filter — capacitor in series, inductor in parallel with the load.

The connection labeled "B" goes to the bass driver. This half of the board is configured as an LC low-pass filter — inductor in series, capacitor(s) in parallel with the load.


  • 1 and 3 are the input from the amplifier for the tweeter
  • 2 and 4 go to the tweeter itself.
  • 5 and 6 are the input for the woofer (bass)
  • 7 and 8 go to the woofer itself.

If you are single-amping this, then you can connect 1 and 5 together, as well as 3 and 6.


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