As long as IK/KH/Q/W/T16/20L (Original 1.1mm) once is gapped to 0.8mm => more power and performance can be expected (immediate effect after installed).
Measurement of plug gapping to 0.8mm will be shown to buyer during order collection.
I was wondering on how would you connect an mp3 player to your existing Bose Head UNit. Is there an Audio in at the unit rear or can I just add a preamp and do this..