Newbie safety 101

[rthorntn]

Hi,

So I've ordered a few bits to start tinkering with DIY speakers and CamillaDSP (RPi5 & HiFiBerry DAC8x):

4 x Wavcor WF168WA02
2 x Vifa NE25VTS-04 tweeter)
3 x TPA3255 boards -- (https://www.aliexpress.com/item/1005006640455408.html)

I'm pretty unsure about proper tinkering "safety", basically how to avoid destroying things.

I'm not planning passive crossovers. I'm going to use an amp channel for every driver.

I gather I should use a 'protection cap' on the tweeters.

I'm going to run the TPA3255 boards from a 24v SMPS dialed back a few volts that should severely limit the watts going to the drivers. I was thinking one TPA3255 board for one L & R driver so one TPA3255 board to run the tweeters. I want each woofer to have it's own amp channel so that I can try a 2.5-way crossover.

So the question is what additional precautions should I use while testing?

Thanks
Richard

 

[eriksquires]

I would worry more during testing, and if your amps have any turn on/off transients. A single 20-40uF cap is all you need. I personally hooked up an expensive tweet directly to a 75W amp and I'm not really worried about it.

 

[GeoffMillar]

You can get a electrolytic 20-40uF cap for a few $$, e.g. from Wagner or Speakerbug, or possibly Jaycar - cheap insurance.

Geoff