Watch the Drop 2 Voicings: online guitar lesson by Brad Carlton from Guitar Lab: The Golden Arp
This lesson presents the drop 2 Add 9 voicings in 2nd inversion. These are really beautiful sounding chords and they post no real problems technically. The drop 2 form is derived from the root position close voicing. Simply drop the 2nd voice (the 3rd of the chord) down one octave and then relocate the root and 9th (2nd). The only issue with register will occur with the voicing which resides on the bottom four strings. Use your ears as there is a potential problem with a muddy sound especially if you're using a neck pickup with a dark sound.