I thought for a while that 30 watts was going to be enough for my Harmonic Precision Caravelles,but after a couple years I have decided to replace my 30.2 for more power.The 30.2 is pretty powerful for a mere 30 watts,but at the end of the day ,,still 30 watts.I will probably go back to a Conrad Johnson SS amp,,very amazing SS amp.I thought about the 70.2 ,but at the price ,there is a lot of very good competition.Plus I could not get used to having to turn the 30.2 on and off all the time.Many times I would want to listen for a longer period than the batteries would take,esp.when the batteries get older,they start to hold a charge for less time.I did not like having to change batteries .For me it became a PITA.I think the 30.2 is a very good amp ,very cool technology!But not a miracle amp .At least not in my system.