I`m using a track lighting setup that has three 50W bulbs.

[topdown98]

I`m using a track lighting setup that has three 50W bulbs. They are MR16 size (they have two contacts that plug into the small socket in each lamp. The dimmer is rated for up to 600W. I tried reversing the wires at the dimmer connection to the power with no change in the buzzing. I also tried a more expensive dimmer, which reduced the buzzing from the dimmer, but not the lights. Help!!! Thanks.

[markmark]

You can hear buzzing coming from the dimmer and each light?? You said you reversed the wires at the dimmer, with no change in the buzzing. Make sure you re-connect the wires back up to the dimmer as per the dimmer instructions.