Join Date: Dec 2000
Location: Philadelphia, PA
Lo-Trs and Lo-Trs 2
Both the TRS and the TRS 2 are double locking tremolos. There are a few differences:
The TRS is used primarily on Japanese-made guitars, while the TRS 2 is used primarily on Korean (or other) guitars. The PGM30 is an exception (Japanese made with a TRS 2).
The TRS has a larger tremolo block, for better tone and sustain.
The TRS is made of harder metal than the TRS 2 and stays in tune better.
The arm in the TRS is the screw in type, while the TRS 2 has a collar on the bar that attaches the arm to the bridge.
Both bridges fit into the same rout, so you change out a TRS 2 for the original TRS in a PGM30, JS100, RG320, etc. It does help with tone, as well as tuning.