Neil ,
There is a slight difference in the circuit when comparing the Excal and the Sovereign .....Not sure what it is yet , but there IS a difference ......It's completely doable when adding an additional audio amp to the Excal when hunting in PinPoint mode , and turning down the Threshold very low as to only hear slight Threshold changes when hunting DEEP targets ....Adding the same audio amp to the Sovereign, and trying to set it up the same way is NOT possible when hunting in Pinpoint mode ....... Something is different in the way things go together ......Many parts of the circuit ARE the same , but there are some differences ....It could be something as simple as how the circuits are wired , or in what order they are wired ....I'm not sure what it is ....Wish I knew .....Hope all is well with you .....Sincerely, Jim
BTW ....Olebeechnut can confirm this ...... He's been experimenting a lot with hotrodding the Excal/Sovereign for beach hunting ......Jim