This bridge is designed for use with EUBs. The manufacturer discribes it as an “intelligent bridge, which fools the pickup-elements into thinking there is a hollowbody underneath”. This is achieved by mounting the piezo elements into a resonant housing.
AJ 301, AJ 301P
This pickups are single (AJ 301) and twin (AJ 301P) sensors which fit in the wing slots of the bridge. Alun Jones from Ashworth told me that “they compare the sound between the upper and lower surface of the slot for feedback cancelling”. He uses a special sort of piezo element, which has multiple layers and is configured with special resilient acoustic contacts.