I run the speakers with MonsterZ series cable with gives the system mega-bass, and I connect them using bannana plugs which are another very inexpensive upgrade. My sub-woofer is a Polk Psw 100. The Adcom line, although it has it's faults, is one of the best lines for the money to use. I have had many amplifiers in the past 25 years. It is even more impressive considering the price.
Lows are deap powerful and accurate.
I find the midrange and high performance to be pleasing to mt ears. I audition Classe, Sonographe, Acurus, and Adcom. All were about the same power, but the Adcom lost out on all acounts for bass control were it was beat by all other contenders, the treble was the grainiest of them all, which gave me a headache during long listening sessions, and the midrange was not near smooth enough for pleasing vocal reproduction. I chose the Sonographe, which though more expensive is worth the extra money in my mind. The Adcom in my mind is the next step up from the basic reciever in the mass market.