IMO the LME49720HA is an outstanding sounding op-amp and in many applications the best. I have had great results with them in the HLLY SMK-II and the sound is more open and detailed while maintaining a punchy bass. BTW, I used heat sinks on the op-amps. I have also replaced the volume pot with a cheap attenuator from eBay, see pic below.
11/22/12 at 6:59am