Hello Peter,
I had 3A Sigs. with two 2wq subs. I used a Rev A+ DNA-1 and had more than enough power. I think your .5 Rev. A is an excellent amplifier and should sing beautifully with the 3A Sigs. Without the two subs I might feel differently, but with the way the crossovers relieve your .5 of the greatest demand, that of the deepest bass you should ralize great sound! Vandys and McCormack amps have always played nicely together.
All the Best!
I had 3A Sigs. with two 2wq subs. I used a Rev A+ DNA-1 and had more than enough power. I think your .5 Rev. A is an excellent amplifier and should sing beautifully with the 3A Sigs. Without the two subs I might feel differently, but with the way the crossovers relieve your .5 of the greatest demand, that of the deepest bass you should ralize great sound! Vandys and McCormack amps have always played nicely together.
All the Best!