PSM®600 continues to be recognized as the industry standard for full-featured wired and wireless in-ear systems. Rugged and reliable, they deliver superb sound for all professional broadcast, recording, touring and installed sound applications. The PSM 600 features crystal-controlled analog operation for superior sound quality. It delivers a full frequency range and great stereo separation. Even the deepest bass notes come through loud and clear. Please note: P6T, P6RE3, and P6R have been discontinued.