Newbie - controlling volume on dual TPA3255 PCB

Hi,

I have this on order, I don't need anywhere near 200W@8Ω, I'm going to run it with a lower voltage, say 24V but I'm not sure what to put on the input side for safety during testing, something that restricts it to a low volume, I'll be testing things before I start using a DSP (Camilla), my limited electronics knowledge would lead me to a resistor voltage divider or a potentiometer, what do you use?

On the output side do these amps just work with 2-8Ω then without having to change anything?

Sorry for the newbie questions.

Thanks.
Richard
 
You mean the normal solution that prevents mistakes and defective loudspeakers? That would be a volume potentiometer. Not only for testing, it always works out positive when you set volume to an acceptable setting and the source or user makes a mistake of sorts. Walking to the amplifier to control volume also helps you to work out and keep moving 🙂

This PCB helps to use an Alps RK27 logarithmic in 20 kOhm:

https://de.aliexpress.com/item/1005...MIoMqpnKy6iAMV6rCDBx1_4RfjEAQYAiABEgLL6PD_BwE

This one incudes the RK27:

https://www.ebay.de/itm/392030562187

The lower the impedance the better ... till a limit. 10 kOhm is not suitable for wimpy sources. 20 kOhm is always OK for normal equipment.
 
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