I bought a used PF410 Ameg 4 x 10 cab. I like the cab and the sound but noticed that it came to me with the 1" horn not functioning. It is an 800 watt - 8 ohm cab. How can you tell if the crossover is fried or if the horn is fried. I have seen both happen over the years. I try to be a DIY guy when I can. Thank You.
You could remove the horn and run a very low-level signal into it, perhaps from your stereo, to see if it is working. Or you could remove the horn and connect a different diver to the wires coming from the crossover board, to see if the signal is getting that far.
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