First of all use DelfTweak from Aminet to overclock your Delfina Lite to 60Mhz. I do it and it works great. (I cant make the script work from user-startup or wbstartup so i start it once every time i boot)
Your using an old version of delfina.library.
delfina.library 4.16
(4.16 ß 3 with PATCH#2 14-Oct-2001)
I have this and it works great. Delfload doesnt work with this library. But all crashes are gone. I will send you the archive once you tell me you email.
About AHI problem, I will also send you my AHI prefs and all my ahi files related to Delfina.
My versions are:
SYS:Prefs/AHI
AHI preferences 5.7 (07/07/02)
DEVS:ahi.device
ahi.device 5.31 (19/01/03)
DEVS:AHI/delfina.audio
delfina.audio 4.9