Speaker protection kit question

[ludkokanta]

12V Stereo Speaker Protection Board for Audio Power Amplifier Speaker DC protect 699996260477 | eBay

Where do I connect the amplifier power interface? Is it optional if I wish to check if draws too much current? (Then connect in series with grid wires). If left out the kit would only prevent dc at output? I don't understand the seller

 

[Old'n'Cranky]

I can't even understand just what the 'amplifier power interface' connection is supposed to do.
If you can't work out what it's supposed to do, then how can you work out where to connect it ?

 

[Lojzek]

Perhaps you should order from someone else, stating clearly what goes where. It appears to me that the seller is trying to explain that you can power this DC protection and turn on delay board by either connecting AC voltage (6-20V) to Power Interface or by connecting DC voltage (8-32) to amplifier power interface, or it's the other way around.

 

[mbz]

Yeah, agree. Kit can be powered by AC via the power interface
or by DC via the amplifier power interface. The power detection
jumper is probably used to select between AC/DC, ie, remove
jumper for DC.

Plenty of other kits available however slightly more expensive.