Speaker Watt rating.

[Logger Mike]

Hi all, I have a couple of  Ho Scale 3-truck Climaxes that I'm swapping out the on board DCC to the new Soundtraxx BLU-21PNEM8's. It's rated at 2W for the Speakers.  My question is does anyone have an idea what the amp rating they put in them?  These are the Spectrum DCC onboard Climaxes...I've tried  Contacting Support directly, but still haven't gotten a reply.  Any help would be greatly appreciated.

Regards,

Mike