Source and review...Click HereThe NL 10.2 is housed in 0.5" thick aluminum which is secured with marine-grade stainless steel machine screws. The NL 10.2's heat sinks are machined from bar stock as the same type of aluminum as the cabinet which enables the amp to operate without the use of cooling fans. Other than what I just shard above there isn't* much other technical information regarding Edges amps on their website, which is odd given the outstanding performance of this amplifier. I guess they let the sound of the amps speak for themselves, which after hearing this amp perform in my system I can't imagine anyone disagreeing with their approach. And if someone has the chance to audition this amp at an Edge dealer, I doubt they will, either.