HOLY Crap! I'm not sure were to post this but I mentioned I'm a new comer here and was using my 4345's w/ 2 Mcintosh MC2000's bridged (270w of tube power) and was not really impressed w/ the performance. I borrowed a Mac Solid state MC 352 (from AudioClassics) and with 350w per channel these speakers ROCKED!!! I cannot wait to incorporate tthe MEN220 room correction/ crossover and Bi-amp these! the 352 will handle the woof's and the 2 MC2000's the mid/hi's . I will let you know my findings and provide pics in a couple of weeks . (my unit is due in next week)