I had three 4a's, best amp for the Aerial 5s I ever heard. My concern would be obtaining IGBT transistors if one had to be replaced. Pass could probably help, but at what cost? Matching of the xsistors may also be an issue.
Nelson's diatribe on electronic devices for audio is very well delineated, available at passlabs.com on some of the owners manuals. Best, Trip.
Nelson's diatribe on electronic devices for audio is very well delineated, available at passlabs.com on some of the owners manuals. Best, Trip.