I have A 2x12 Cab for 3 years I was running Et-65 speakers, I love these speakers But 2 in the same cab was pushing to much mids. Enter the Retro-75. Exit 1-Et-65. and now it is perfect good balance great lows mids and highs. I am running A Marshall JCM 2000 DSL 100 head. Now with the addition of this fine speaker combo thanks to reading what Vaughn had to say it paid off for me big time. At first I had my cab that the Retro was on the Bottom it was nice I jammed for an hour then flipped my cab so the Retro was on top and jammed and went yea now this sounds really nice. No more frustration. I will always use WGS speakers and for my ears this speaker combination fits the best to me in A 2x12 or 4x12 Cab X pattern in the 4x12 Cab, Once again nice speakers ..
Thanks for posting your results! Yea, the ET65/Ret 30 combi is hard to beat!