i have also read from another forum that a 1000 watter speaker is an overkill in a WSX e.g. the V18 1000 and the SD18. besides, the original driver in the martin WSX is rated 600W AES, 2400 peak (
http://www.martin-audio.com/products/WSX.asp). but the original driver has a high xmax. about P Audio drivers, according to the specs, mas mataas ang xmax ng C18 800w kaysa SD18. kaya okay na ang C18 800W. for me, tama na sa akin ang C18650EL.
ganda ng pag-kagawa ng WSX sa musicbox. kudos to you sir Jef!