I have a MAG 115C 300w combo with the MAG 410t extension cab. I thought the 15" speaker sounded good until I got the 410t, then I realized that the 15" blueline driver (150 watts from what ive read at 8 ohms) really sounded kinda muddy and could not come close to producing the tone of the 410. After doing much research, I decided to replace the 15" blueline driver, so I just ordered the Eminence Legend 15 " 300w 8 ohm driver to replace it. NOW my question is...I have never replaced an original speaker for an upgrade so, will it be an easy unscrew and rescrew of the new driver? will the connectors be similar or will I have to do some engineering of my own? will the holes line up or will I have to drill new ones? Any answers you might provide will be appreciated.