You are welcome.
I'm sure the AZ Crescendo is a fine speaker, however with the 6 ohm impedance, the sensitivity at 1 watt would be 88.5db, 1.5db less than the listed 90db. Also, recommended minimum power is 50 watts. That tells me it is somewhat power hungry and would likely be better in your space with more power than the A-S2100.
I'm sure the AZ Crescendo is a fine speaker, however with the 6 ohm impedance, the sensitivity at 1 watt would be 88.5db, 1.5db less than the listed 90db. Also, recommended minimum power is 50 watts. That tells me it is somewhat power hungry and would likely be better in your space with more power than the A-S2100.