After a few years of drooling about the Sony MDR-R10's and missing out on chances to buy a pair, fortune finally struck. I have read many posts that the R10 needed a good headphone amplifier to sound its best, and if not properly fed, would sound relatively average.
Many R10 headphone owners use and swear by SinglePower amps, and after hearing the R10/SinglePower Dragon combo, I can see why. The sound quality of this combination is truely remarkable. However, the recent posts regarding availabilty and reliability of high-end SinglePower amplifiers are somewhat alarming, and those looking to properly amplify their R10's may wonder where else to turn.
I can tell you that the R10/307A combination is an absolute out-of-the-park home run. Gobs of detail, deep soundstage, a warm yet evenly balanced tonal palette, and great punch. The resolution this system provides is almost microscopic, yet the detail is never etched, fatiguing, or thrust in you face.
After living with the TTVJ Millett 307A for three months, all of my original feelings are solidified. I am thoroughly pleased with the sound quality, build quality, and functionality of this amp. Is it the best dynamic headphone amplifier on the market? Perhaps, but that is a question that cannot be definitively answered. Is it the best headphone amplifier I have ever heard? Absolutely!