Wow.....it's amazing what you find when you finally clean out a closet!! Found a new set of Hi Beams mixed in with a bunch of old strings today! I don't even remember when I bought this set or for which bass I was going to try them on! So, seeing how my Jazz bass is long overdue for a string change I'm going to install them tonight. I currentley have a set of Sunbeams on and they're quite dead. Seeing how Sunbeams and Hi Beams have a round core I would imagine the tension should be pretty equal. I've never tried Hi Beams before so I'm wondering who uses them on a Jazz bass and what's your impression? My bass is a 2009 American Standard.