The way you've written this I'm assuming that initially you had no problems at higher output levels but now the B+ rail fuses are failing? Both channels doing this? You might have the amp bench tested by a tech. Have it run at rated power into dummy loads of similar impedance to the Theils for a couple of hours to find out if it holds up.
Something in the load is possibly degrading if the amp is OK; possibly capacitors breaking down in the speaker crossovers is what she's alluding to. Or there could be a voltage protection device in the crossovers (such as zeners or varistors) which are now stressed from repeated overloading.
If it's always been this way then yes, you'd probably want "more power Igor".
Something in the load is possibly degrading if the amp is OK; possibly capacitors breaking down in the speaker crossovers is what she's alluding to. Or there could be a voltage protection device in the crossovers (such as zeners or varistors) which are now stressed from repeated overloading.
If it's always been this way then yes, you'd probably want "more power Igor".