I use an amp once / year for the public address (transformer output of the amplifier). I use it every time for 10 hours non stop with the "clips" that blinking, it heats up a little but given the age, I really can not blame him. I once used the speakers Boost type double 38, the silent sound pretty good (ok there were Boost at the end but ...) Nothing to say about this amp from a current peak at boot time you hear the speakers (and yes this amp in aps dot era n'tait relay cutting the link between the receiver and HP). Dernire a thing is really tough this brand, this amp has almost 20 years and it works tjrs and the sound is very natural and excellent! I would put 9 / 10 because of this current peak at boot.