Jim,

The recorder's phantom power should measure 48-volts DC, which is the standard, and according to what I could find on the mic specifications, it will operate with as little as 11-volts DC, which is probably due to it's oversize diaphragm.

From the reviews I've read on the mic, it's not as sensitive as some, and lends itself to singers holding the mic nearly vertical and singing into the side. Like some of the other high-end Shure mics it probably requires a powerful singer to get the most out of the mic.

As for the tube pre-amps, overall they usually provide a softer, fuller sound than some of the solid state systems, which tend to be a bit more crisp and clear. Tube systems have other issues, but overall, they are rated very high by the recording industry.

Before spending a lot of money on another recording system I would first try using a different mic, one that has a different polar pattern. This often makes a huge difference.

I'll be back in the office after 6 tonight, and until noon tomorrow if you want to give me a call.

Cheers,

Gary