I know I am going to get yelled at for this but I am going to ask just in case. I have S4 TII just got an RTek 1.8 in a trade. I have one set of 720's and one set of 680's. Will this work with 720's in secondaries and 680's in primary. I knw you are supposed to use 4 720's. I have an SAFC II as well and was wondering if I could push the 680's a little harder.
Know I am ready for the flaming
Thanks in advance!

 

You can. 680s an 720s are pretty close. I would do it very carefully though and wouldn't do it without a wideband.

 

That is what I was thinking. Thank you much. I will let everyone know how it goes.