This TQWT ( Tapered Quarter Wave Tube ) enclosure is a full range enclosure equipped with a 215-2000.
With the efficiency of the 215-2000, it makes it possible to used with valve amplifiers of little power ( 2A3, mono triod ).
We find all qualities of the 215 Signature with more dynamics and better linearity in high medium due to the absence of bicone.

Another sights :
Back side and front side with driver mask