Not talking about impedance... I have an old Kalamazoo 5 watt practice amp - similar to a Champ. It had an old CTS speaker in it - I had a Ragin Cajun lying around so I put that in there. I was expecting to hear a huge difference but there wasn't. I'm sure it must be slightly louder (though I didn't notice a huge change) but the tone was pretty similar. I was thinking maybe that the Eminence speaker might be better suited to amp that can really drive it a bit,- is this true? Or am I totally off-base here? What 10" speakers would be good for that amp?