Allow me to preface by saying that I'm not an expert on anything, I only offer my experiences in this regard.
I'm running straight ADS surround system. Front (ADS L1230) Center and Surrounds are custom built (ADS L810). All are 6 ohm and I'm using the Yamaha RX-A3070 which is set at 8 ohm. Because it was a gift, I have an amp cooler sitting on top of the Yamaha. That said, hottest temp I get at the lowest fan speed is 78 degrees. Before I got the fan cooler the top of the amp always felt normally warm, never hot. Before I got the Surrounds done, I was using a pair of L400's for the surrounds, the amp temp was the same normally warm, not hot. I'll run it around -25 to -20 volume for Music and -19 to -16 volume for Movies and avg around (roughly) 85 db at 10 ft away. Measured inaccurately using a phone app admittingly. Still, it's plenty loud enough for anyone who's ever been here listening.
I'm running straight ADS surround system. Front (ADS L1230) Center and Surrounds are custom built (ADS L810). All are 6 ohm and I'm using the Yamaha RX-A3070 which is set at 8 ohm. Because it was a gift, I have an amp cooler sitting on top of the Yamaha. That said, hottest temp I get at the lowest fan speed is 78 degrees. Before I got the fan cooler the top of the amp always felt normally warm, never hot. Before I got the Surrounds done, I was using a pair of L400's for the surrounds, the amp temp was the same normally warm, not hot. I'll run it around -25 to -20 volume for Music and -19 to -16 volume for Movies and avg around (roughly) 85 db at 10 ft away. Measured inaccurately using a phone app admittingly. Still, it's plenty loud enough for anyone who's ever been here listening.