Receiver's Audio and HD Audio performance

[Srficat]

Originally Posted by jeff92k7

You're getting caught up in too many spec sheets. You must realize that 0db is impossible to acheive, no matter how much acoustic treatment you put in your room. Typical background noise in an quiet house is anywhere from 25-40db. An average office is usually between 40 and 65db. The human pain threshold averages around 120db.

So in a quiet house with 30db background noise and a top limit of 120db, this only leaves you 90db of dynamic range. In reality, most houses are closer to 40db.

Pretty much, anything over a 90db S/N ratio is not going to be noticeable outside of a specially designed testing lab. Just because a spec sheet says that a particular piece of equipment has a greater S/N ratio, doesn't mean you or I will ever be able to take full advantage of it.

You'll have to explain to me how your THD numbers calculate into a 66db S/N ratio. I've always understood THD to be inaudible at levels lower than 0.1 percent and really more of a thing to put on spec sheets to confuse people and make them think that a meaningless number actually means something.

with the db unit as ratio. I can easily put my AX4 volume to 0db with no signal, to hear the receiver backgrund noise. have a good day.