I want to hear from other builders to see if they have tried other IC's other than the 4556?
I want to build and O2 after building my first cmoy and being quite impressed, but question the 4556. I have the 2228 in my cmoy right now and sounds quite impressive. I tried the 2132 and to me it sounded similar to the 2228, but the 2228 had a tad more detail on the top end and also better low end performance. The worst of them all was the 4556, which is why I am wondering if the O2 might see and improvement with a different IC.
I know technically it tests better and the circuit was designed around it, but I just wonder if this design could be improved upon with a better IC, or are the others just not up to the challenge or compatible with the circuit design.