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Crossover help?

Hi to all I'm hoping someone might be able to help.

I've tried to upgrade components within my crossover and now have no HF signal.

The tweeter checks out.

I've searched for bad joints , shorts etc but can find nothing obvious.

Today I've pulled the upgraded components from the Hf circuit but still have nothing.

Using a continuity test its all good up to the main cap and after back to the terminal.

I do get a bleep from both terminals so assume thats the parallel resistor.

I'm at a loss as to why its gone completely dead.

Anyone got ideas how to check the network front to back with only a basic multimeter?

 

Thanks in advance if someone has some ideas

Regards Ian

 

notdeadyet

Showing 3 responses by imhififan

imhififan's avatar
imhififan
2,217 posts
 

I do get a bleep from both terminals so assume thats the parallel resistor.

I think you wired the high pass crossover wrong. If there’s a parallel resistor, it should be after the capacitor and connect across the tweeter +/- terminal.

If the parallel resistor wired in front of the capacitor across the input side +/- terminal you will get a bleep on continuity test. If that’s the case, the resistor "shorted" the high pass crossover input hence no HF signal reach the tweeter.

imhififan's avatar
imhififan
2,217 posts
 

what is the brand and model of your speaker?

To post pictures, go to https://systems.audiogon.com/

Click the "Create system" on the top menu bar, then type in a system name and you can start add images to it.

imhififan's avatar
imhififan
2,217 posts
 

These are the photo OP posted on his system page, Seems like a simple two ways 2nd order xover with total 6 components.

The 3rd photo I believe is the original xover.

Based on the picture, I draw out the schematic:

  1. Without tweeter connect to the board, use ohm meter test across the HF input terminals, it should be Infinite resistance.
  2. Across the output terminals to tweeter, it should has a reading of about 3ohm or little higher ( 2.7ohm+DCR of the small inductor).
  3. Ohm meter on HF negative input terminal to negative tweeter output terminal should has 0ohm reading.

Hope it helps and good luck 🤞

 

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