cust. support as well for the specific model), but they need a sweet sounding amplifier as well- dartzeel, VTL's (High wattage tube amps), etc.; ALSO, the best wire, the best preamp, the best sources, lots of matching the right components, etc. etc. etc. they are typically a non-forgiving product. the room and placement is also critical for the best results. the sound at the end of all of this work can be amazing though. Even the now-extinct watt-puppy can still
blow you away with the right set-up.