20 years or more for a solid state amp is not unreasonable.
The biggest issue I can think of for multi-channel amps is ventilation. Shoving 3 additional channels in the width of a traditional 2 channel amp is a challenge for space and air flow. If they are put in a tight rack with little air flow they probably won’t do as well as an open shelf.
The biggest issue I can think of for multi-channel amps is ventilation. Shoving 3 additional channels in the width of a traditional 2 channel amp is a challenge for space and air flow. If they are put in a tight rack with little air flow they probably won’t do as well as an open shelf.