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It is currently 12 May 2021, 12:20

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 Post subject: 3-way crossover
PostPosted: 27 Mar 2021, 06:52 

Joined: 22 Mar 2021, 11:42
Posts: 2
I have put together a 3-way crossover circuit: sub (300W max), mid low (200W max) and mid hi (120W max), to which I will then add a horn piezo tweeter to kick in at 2KHz. The circuit is in the image below.

I've tried the mid hi speaker only (right now the other two are not available), and what I have experienced is the following: as I raise the volume, the speaker starts clicking, especially when a low thumping frequency is hit.

But if I add a 2 or 4 Ohm 100W wirewound resistor at the very beginning of the circuit, before the signal goes to the different drivers, the quality of the sound is much better. The mid high speaker works really well and delivers pretty sharply. The resistor also gets really hot after a minute.

I have shorted the other drivers as well as left them open: same result.

Any ideas why? I have been told it's not a good idea to use a 4R at the beginning of the circuit because it uses up a lot of voltage, but now I see it could be actually very useful.

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