yeap...am helping out a friend...I have a 700B..any idea of a full conversion would cost more or less..?..maybe better going directly to a done 700B..see some for sale on here..never had a 400,so cant really advise my friend about choice..i am conneted to jbl l250..they need the power of the 700B..but my friend is using 4412's jbl...so might be a overkill to go for a 700.