I own a pair. Used tri amplification with xti6000 crown for bass and TSA4-700 for acute Thomann medium. The processor is a DriveRack PA. All for economic reasons.
I love the transparency of its very good performance, power to weight ratio space. The quality is the appointment even if I have to work in active filter due to a fault on one of the filters.
Coupled to a pair of JBL srx718 subs I have a compact and powerful system. The JBL is in parallel with the 18 "Adamson, for reasons of economy I have not bought a second amp for subs (cut with the medium is 400Hz)
What I like least, weight and even the dolly dedicated and 4 handles is transportable, compression medium that is no longer too today.
The value for money is very good OCASE. Adamson nine very expensive.
I hope I can afford a JBL VRX to replace the system and complete the JBL subs I love the sound level!