Originally Posted by OllieS
Originally Posted by mcnarus
No, there isn't more headroom. There's more power in the amplifiers, because you now have two amplifiers drawing power from the wall. But your drivers aren't seeing any more power. Each driver is still seeing 60 watts.
Goodness, you people are just contradicting yourselves now. Double the amp power means there is more reserve power available for when you need it. You guys just keep on coming up with examples trying to explain away the additional headroom.
Each driver is still seeing 60 watts.
But wait, now YOU are wrong. The driver is not "seeing" 60 watts. That's the amount of available power, not the amount of power the driver draws. You keep telling me that available power and power are two different things. So why are you not following your own advice?
How many times do people have to tell you you're wrong, before you will admit that they are not telling you you're right?
But HOW am I wrong? More power, more headroom????? Whether you use it or not is irrelevant . You may decide to turn the volume up one day that may eat into the reserve power. But stop beating around the bush here, for goodness sakes..
I'll have one more go at this before I give up and consider you as unteachable (no offense intended). You say "Double the amp power means there is more reserve power available for when you need it."
So when do you need it? If you are hitting the SPLs you require, cleanly, from the amp power you have, with some headroom, then when will you "need" more than that? Your question makes no sense - in my bridge example above, 100 feet of headroom and 21 feet of headroom are the same thing! If the tallest vehicle that will ever go under the bridge is 18 feet, then you will never "need" more than 21 feet of headroom. You seem to think that having amp power you will never need is useful - well it's no more useful than that 100 feet of headroom in the bridge.
The amp power you need is the right amount to drive your speakers to the SPLs you require, cleanly and with some headroom 'to be on the safe side' if you will. That's it. More amp power is pointless and wasted.
"More power, more headroom????? Whether you use it or not is irrelevant " ?????????? Excuse me? Headroom is headroom - as I have explained, when you have enough, you have enough and adding more is pointless. What is the point of 100 feet of headroom for that bridge? Why would it be of any more use than 21 feet?
"You may decide to turn the volume up one day that may eat into the reserve power." Ignoring the issue of whether the speakers can handle more power in the first place, again you are looking at this from the wrong direction. What you need to do is ask yourself "what is the highest SPL I will ever want in my room?". Once you have answered this, then you need a speaker/amp combination that is able to deliver that cleanly. That's it. If that amp works out at 100 watts, then having an amp that is 200 watts does not achieve anything.
For example, I use my HT for movies only, so the loudest I ever want the system to play is 105dB on peaks (115dB LFE peaks). That is movie Reference Level. I have bought speakers and amps that enable me to approach that level cleanly, without clipping. What you keep saying is that, no, I actually need more powerful amps so that I can have more headroom for "when I need it". I will never need it. So buying more powerful amps is pointless and a waste of money. I already have sufficient headroom, explained by the fact I hit the required SPLs cleanly, so having even more headroom serves no purpose.
Final point: several people in this thread who know what they are talking about, and who have huge experience of AV systems, to the extent in some cases of actually designing systems commercially, have told you how this all works. Ask yourself: who is the most likely to have got this all wrong? You, or them?
Edited by kbarnes701 - 9/29/13 at 8:49am