I have a super pro DI and it works great with all my passive basses!!!!! I have never had any sound man/front of house guy complain about low levels. it really gets rid of hum and noise more than my IMP or DB-100. It has a special little sound to it also. I think it is a great di and very solid made. I like the metal low-z input jack too. I do not know if it sounds better than the Radial, I just know it works great!!!!! And is very easy to use.