no worms, just Killer b's or Sunray Gold for me...
While I don't like the way they hold in sweat during the summer, I wouldn't want to be without my Killer b's Wasps. They're sensitive to the tiniest signals and have a clear, high pitch. They're handmade in USA by John Smith of Alabama, and come with a lifetime warranty. The Kb's are built using Pro Ears muffs and have real leather on headband and ear surround. They all use super-sensitive 150Ω Audiosears speakers, with "Wasp" model having dual volume controls, a limiter circuit and switch, a mono/stereo switch, and heavy-duty coiled cord with 90° angled plug. They should work with any detector that has a standard 1/4" jack.
The Kb's make all of my Tesoros sound better to me, even the standard tone Vaquero and Cibola.
BTW, I recently sent my Kb's in for a warrantied repair of the coiled cord, which had an intermittant "open" (a break) in a wire. I got the headphones back within ten days, good as new. Thank you, John Smith!
Planning on buying another set of either Killer b's or Sunray Golds for backups. They do seem a little expensive...'till you've used 'em.
If you don't mind them keeping your ears quite warm in summer, I highly recommend the Killer b's.
P.S. - If anyone is interested in some Kb's or Sunray Gold, the best prices I've seen on them are from Colonial:
Killer B Headphones | Colonialmetaldetectors.com