Ok, I'm an op-amp novice, so be gentle.
The Mike Matthews Dirt Road Special's preamplifier is built around the 4558. Two pretty simple non-inverting stages with two feedback paths each - one being a resistor only and the other being "frequency selective" for implementation of the tone and bite control.
I'm thinking I want to replace the 4558 with a TL072. For no other real reason than I have an amp that uses TL072 and it sounds pretty good, and as I understand it, the 4558 is considered a "low quality" device for audio.
I have done some homework. The pin-outs for the 8-DIP package are the same. The critical supply voltage and common mode signals and a whole bunch of other things I don't have a clue about are the same if not better with the TL072.
I can't see any reason why I couldn't just swap a TL072 for a 4558.
Anyone see anything I can't?
Thanks!