have heard the 2200 ,very good neutral sounding amp top to bottom very good midrange excellent resolution,,then i heard the ca m 400 monos ,also excellent neutral sound top to bottom with excellent midrange no grain whatsover, so i wound up buying them amp is powerful and polite.when it needs to be and do not run hot,,both these delta series amps run Class A for 1/3 of their power rating which means around 65wpc for the 2200 and 130wpc for the m400,both into 8ohms and i dont think there will be that many occasions when them numbers are exceeded...
