Installed these in Gretsch 2622 Streamliner. Very high quality pickups. Very clear and bright. Negligible hum on neck. Very faint hum on bridge. No hum with both engaged. Night and day compared to a Broadtrons. Nice bite, more spank, quite nasal. Highs not overwhelmed by lows as with Broadtrons. Not as much twang as 6120-55 equipped with these. Leans more toward a Duo Jet with Dynasonics. With Broadtrons, never used roll-off on treble, and still lows muddied-up the highs. However, with the T-Armonds a little roll-off is fine. Very balanced pickups. Bridge clear, not gritty at all. If you like ultra clean, these are worth strong consideration. However, on the mounting rings, although inside dimensions are perfect for the T-Armonds, the outside dimensions are too small. they do not cover the route holes in top of guitar.