Originally Posted by m. zillch
"Finally"? That's absurd. Here I am, for example, over a decade ago and well before you existed on our forum, expressing the importance of keeping an amp within its operational range:
"Amps that are driven past their safe operational range and into any kind of clipping ("soft" or otherwise) have undeniably audible distortion." -m. zillch 01/14/2009
"I don't think there's a single person in this entire thread who thinks all amplifiers can play equally as loudly as one another before exhibiting audible distortion . The real question of the thread is, "Do all amps sound the same, when kept within the operational limits of the weaker of the two?" The question is one of quality, not quantity.
Are more powerful amps capable of playing at a louder level without clipping the peaks, causing audible distortion compared to weaker ones? Sure, that's obvious to everyone. No need to discus that topic; it is a red herring/straw man argument. " - m. zillch 03/30/2011
I have understood this concept for many decades and I have never learned anything from you. Your suggestion otherwise by saying "finally" is disingenuous and reflects poorly on you.
But you said a cheap yamaha will sound just as good. Like I said, they only have one pair or max 2 pair of output transistors. That's not good in driving low impedance load.
Let me give you some scientific education.
If you have one pair of output transistors and you drive 4 ohm load. It's is hard of the output transistors because the output impedance is not low and the sound degrade, particularly if the speakers dips even lower than 4 ohm.
If you have two pair of output transistors driving 4ohm, each pair split the load, it's as if each pair driving 1/2 the load or 8ohm ( double of 4ohm).
If you have 4pairs driving 4ohm load, each pair sees 1/4 the load, or 16ohm load, this make it easier for each pair.
If you have 8pairs driving 4ohm load, each pair sees 1/8 the load or 32ohm.
The higher the impedance each pair sees, the more ideal the behavior. That's the reason a good amp has to have many pairs of output transistors so they share the load. With 8pairs, the amp can drive impedance down to 2ohm or lower.
That's the difference between a good amp and cheap yamaha. This is very simple science. The better the speakers, the better the components used in the crossover network, the sharper the impedance spike and dip, the more important to have a good amp with very low output impedance. If you have an easy to drive speaker with mild dip and spike of impedance, then amp really doesn't matter as much.
Stop and read, you might learn something. Don't keep telling people all amps sounds the same as long as it's not clipped. This is science. This is backed up by real text books, not some articles.
And let me correct you, a 100W amp that is not good ( say have one pair of output transistors) will NOT clip by default, clipping is NOT caused by low impedance. You never drive to 100W in normal listening. The transistor might just over heat if you drive low impedance and very high volume, it will NOT clip. Over heat is because of cheap amps usually have small heatsink. And that's another thing the good expensive amps will have bigger heatsink. You can take it to the bank on this. Just read and learn.