[Elecraft] KX-3 Powered speaker suggestions?

[Ron Manfredi]

I prefer to operate without headphones, but find the audio output from 
my KX-3 to be too weak to be usable, and the rigs' audio amp is not up 
to driving an external speaker very well.   I tried both an amplified 
Motorola speaker and a small MFJ unit, but when using SSB (10-15 Watts) 
at home into a beam or into a dummy load I can hear myself quite clearly 
in the speaker, so RF is getting in somehow.   (the rig's Monitor 
function is not turned on!)   I have tried ferrites on both the power 
and audio lines to the speaker, but they have not helped.   This is 
while using an Astron RS-35 linear supply for both the rig and the 
speaker.    Any suggestions, or powered speaker recommendations?

Ron,   WA2EIO.