Home / Forums / General melodica discussion / Compound pipe for Hohner Super force 37 / Reply To: Compound pipe for Hohner Super force 37 Reply To: Compound pipe for Hohner Super force 37 May 23, 2014 at 3:03 am #2360 Melodica-MeParticipant Jazzman, very interesting. Is there a limit to the amount of joints or does it restrict air flow if to many? I am going to try this. My Superforce really gargles after about 30 minutes. Melodica-Me