Emotiva amplifiers review/experience?

Re: sound from heat sinks. I contacted Emotiva about this. The tech said they consider this normal operating behavior in the aluminum heats sinks. My old Bryston 2B never did this and my current power amp, a Hafler 9180, doesn't either. I guess it depends on how loud this is and how long it persists once the sinks are warmed up.

I've never heard it either. My XPA-2 doesn't do it.

my xpa-2 has never clicked

Here is an idea. If Bryston has a 20 yr. warranty, are they saying their products won't last that long?

The thread was about the XPA 1 on EMotiva lounge...It being a 'differential amp' with different circuitry. Unfortunately, as much as I wanted the amps, (the warranty means little when you are shipping 90 lb amplifiers) But I have not knowledge to question their construction techniques....But it should have turned up in the check out period or they were following blindly, another company's schematic Otherwise the $1700 holiday price is a 'gift'