I remember, back in the day(early 90s to 2003), that every AVR you could buy handled 4ohm speakers.
Of course, back then...we still had Technics, Kenwood and JVC(few others as well). On another thread here is a guy with Polk SDA 2. Back then, you could buy any AVR you wanted and be fine. Cerwin Vega D series were 3-5ohm. Infinity didn't have anything floor standing over 6ohm.
In the last 5-8 years...what happened?
Craptitude of the market taking over?
Less competetion(from, what...12 viable AVR makers down to...5(???) now)?
I came across this weekend with my first "my AVR died" situation(I design home theatres)...where the manufacturer is denying the claim...due to the speakers.
The AVR in question was $1800. The speaker set was $14,000. In the process of the AVR imploding...the main channel tweeters were fried(speaker company is making good on them...as even they are shocked).