I am a couple of days away from spending my money on a LM219ia. But when talking to a former seller, he told me that these amplifiers have a 10% to 20% rate of technical issues. Usually some kind of component failure. Are there any owners out there that had any problems with this amp?
Also, you might want to browse through this A'gon FORUM thread -
ineMagnetic219ia vs. 518ia - and contact directly via A'gon messaging the members that have the 219ia to possibly get a quicker response
Just out of curiosity, what makes it very well built? Looks kind of cramped in the unit, hard to remove any heat that way. Small circuit boards and wires are strapped together. Could be very well built or not so well built.