If you play the same amp and speakers at the same volume control setting in a small or large room it will seem a lot louder in the small room (particularly since you tend to sit close in a small room).
Alternatively, if you move the system from a small room to a large room you will have to crank the volume up to get the same perceived loudness. If your amp isn't powerful enough to play well at the higher volume and the amp starts "clipping" you can end up with a lot more high frequency energy than normal which can blow the tweeter.
Music normally has much more energy in the low frequencies than in the high frequencies, so you can have a dainty light tweeter and still run a lot of power through the speaker as long as the frequency distribution is "music like". If you start clipping, or play pure high frequency tones, you can easily end up putting much more power through the tweeter than it was designed for.
In other words, it's not the big room that affects the receiver it's the fact that you have to crank the volume higher in a big room to get the same volume.
Big rooms need big (more efficient) speakers or big amps or both.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8
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