My alto has a robust sound below the palm keys...robust also in altissimo.
In the palm key area the sound is considerably weaker....having to concentrate, & tighten my embouchure considerably.
It is improved, but still not strong, with a high baffled mouthpiece & harder reeds.
The pads are opening sufficiently, also the neck octave pip. Not fully opening the palm keys makes no difference. I have checked that the pip is clear & that the neck is gunge free.
Any ideas anyone?