[Christof]

I'm building a pair of single driver full-range that has an optional LCR filter.  I would like to make the filter switchable but not exactly sure how to go about wiring it.  Is it simply a two position switch installed after the filter as shown below?  Further, what type of switch should I use for this application?


(-)---------------------------------------------------> (- speaker term)


                      ___filter______             ______
(+)-----------<                         (switch)           > (+ speaker term)
                     ----no filter------             --------


Thanks much
Chris

[whubbard]

I read the title and thought you were adding a switch to a network (as in Network Switch to a Computer Network) 

Thought I could be of help, but I guess not, sorry.

-West

[JoshK]

 Is the LCR network strictly in series?  No parrallel paths back to (-)?  If yes, you want a spst(on/on) switch for each speaker filter.  Switch the positive like you have shown.    I'd probably turn off the amp to before switching the filter in or out.

Another way you can do it even simpler is to use a SPST(on/off) switch to short out the filter or not.  [When the switch is "on" is parrallels a wire to the filter, the wire short circuits the filter so the filter is essentially not there.  When the switch is off, the wire is open and not shorting the filter out].

More like this

                      ___filter______________________
(+)-----------<                                                > (+ speaker term)
                     ----wire------ (switch) ----------

[Christof]

Josh

Thanks, here is the filter diagram:



Install a SPST before the filter on the (+) wire.  One wire coming into the switch and two going out.  One of the out wires goes to the filter and the other goes to the node after the filter thus bypassing the filter when the switch is thrown, correct?

[BillB]

You could also throw a 2nd positive binding post that went straight to the woofer...this might be a better "purist" approach as I am sure others will tell you switches sound like crap....whether you believe it is up to you...but if you want to compare two things a pure line would be best.

[JoshK]

You could also throw a 2nd positive binding post that went straight to the woofer...this might be a better "purist" approach as I am sure others will tell you switches sound like crap....whether you believe it is up to you...but if you want to compare two things a pure line would be best.

That would work equally well.