Acoustic 201 cab...where does the horn connect??

[acorkos]

The darker brown wires are coming from the input jack. the other lighter brown pair are going to the 2x15" speakers. Where should the horn/tweeter connect?
The caps are 22uF, joined at their "-" leads. The resistor is 5 ohms. the 2 lugs on the left are connected (15" speaker and jack [+] ), as are the 2nd, 3rd and 4th from the right (15" speaker and jack [-] ). Thanks!

[The Dude]

Ok, this is an "educated guess". I'm thinking the two series caps are to make a non polarized cap. So, you effectively have an 11uf non polarized crossover cap for the horn. I can't see the other side of the terminal strip and I'm thinking there are some jumpers we're not seeing, so this is a bit of a guess. The + lead of the jack and 15" speakers goes through the two caps and then through the resistor to knock down the level of the high frequency. You can trace this out and see if my theory is correct. If it is, the - horn will share ground with the other grounds and the + horn connection will go on the end of the resistor that is not connected to anything.

[acorkos]

...If it is, the - horn will share ground with the other grounds and the + horn connection will go on the end of the resistor that is not connected to anything.

it is, your guess sounds good....I will try it when the horn is repaired and returned. thx!

[olddawg]

Interesting... Whenever I have seen a hi pass filter made like this, the two caps are usually "back to back" in parallel to form a nonplarized cap. 22uf is usually good for midrange and above. Old cheap 3 way stereo speakers were made that way with a 22uf nonplarized to the mid range driver and a 4.7 or 2.2uf to the tweeter. I've had to do this on the fly at live sound situations when there was a problem with an electronic crossover or a dead amp. I just paralleled a horn off of a bass bin with a couple of 22uf caps back to back.

[The Dude]

... Whenever I have seen a hi pass filter made like this, the two caps are usually "back to back" in parallel to form a nonplarized cap.

Not trying to be a "Richard Noggin", but you can't make an NP cap putting caps in parallel. The caps are in series.

[Enzo]

yes, in parallel, nothing prevents reverse polarity on one of the caps during each cycle. In series they block for each other.

[olddawg]

Truthfully, it's been years since I thought about the theory of it., that's why I found it interesting.....But that was the way it was always done. Electrolytic caps in parallel back to back. Positive to negative and negative to positive. Always seemed to work fine. I never bothered to look it up. I can tell you it does work. And like I said, it was how all the cheap stereo speakers were set up in the 70s and 80s that didn't have proper crossovers.