This is a great speaker for low power SET amps. I received these kit spkrs from AN kits in Canada. I used a 300B amp and also a 2A3/45 amp with these speakers. The efficiency is around 96 db. They are 8 years old with no problems or issues.
Local Chicagoland sale only at this time, as I have no shipping boxes. Asking $1500 obo.