Here are some Rane rtas. The Rane rtas while being a fun light show, also allow one to apply weighting options. Why do we need weighting........ because we do not hear what we can measure. With the mics supplied with these they measure flat to within
1db from 20 to 16000k.
When you apply the C weighting the RTA applies the science of fletcher Munson equal loudness curves. While still not exact to the ear
this is an effort to adjust output Flat to the EAR, rather than flat to the microphone. I use lots of these for fun, as they also can be used as VU and SPl meters, though max spl is 120db.
The Munson science is where the rules of 4 times the power for double spl, and 10 times the power for double the loudness come from.
Amplifier output meters on our pro audio amplifiers are also calibrated to the Munson sciences, where the db ratio follow the log scale of Loudness, not spl, nor output in watts. Zero on the amplifier output scale or momentary clipping now and then is considered full output. This means that any amplifier with accurately calibrated output meters, will give its full out put at 0db. 10db down from this full output would be 10 times the power less, So a 5000 rms amplifier will be putting out 500 watts at minus ten db.
Because of the huge hill here. 4 times the power for spl and 10 times the power for loudness, Once we reach 1000 watt rms
the benefits of more power are mute in comparison to any further output benefits. So much so that even arguing over a few db
here or there is quite meaningless with the huge waste of power that must be achieved to get further output.
One must remember that in statistical analysis. For proper comparison , one must isolate the factor being evaluated. IN this case it is the value of more power past the 1000 watt rms mark. The only way this can be done is by driving all that power into a single subwoofer, and then measuring its output , with both weighting and no weighting. In any event the total benefit available from 1000 to 10000 watts, is a max of 10db for double the loudness, and a max of doubling spl once at 6db. Once we doulbe spl once at 6db
this brings us to 4000 watts, vs 1000 watts starting point, One more doubling of spl would require 16000 watts.
Now most of us will never use this much power for a single subwoofer. You can use multiple subwoofers , but once you do this you are no longer isolating power as the factor causing the increased output, YOu now have increased displacement to take into account.
as well as any benefits of porting.
The fact displacement is the main factor of bass output can be seen everyday, buy looking at anyone who creates a super woofer
sub system. They got not only huge 15 inch to 24 inch subwoofers, but also use 8 and more. This is because 1000 to 2000 watts per sub is pretty much all you need to get output that would make you leave the room, rather than sit and enjoy the bass.
The majority of users will easily find out for themselves, that as you increase displacement. less and less power is actually needed,
unless your planning on making spl records rather than enjoying music, and why AVS told us that nynot felt he was giving up the goat and had to move to ported. Because increasing displacement that way was still necessary with all his electrifying god given power.
As you add each subwoofer, you are no longer evaluating power above 1000rms to 10000 rms, You are now starting at zero again for that added subwoofer............. So if one wants to brag about a 10000 watt amp, the only benefit I can see is less space using a single amplifier to power a lot of subwoofers as well as for the definite need of a single outlet with 30 amp minimum, and maybe even 240 volt applied.
The other factors to consider is having multiple huge motors on a single amplifier. The amplifier only sees one driver, no matter what you hook up to it. All those coils and all those magnets mean the back emf generated by each subwoofer now travels back to impede proper woofer control, though a single 12 gauge wire. OR maybe we need to go to 10 gauge here LOL. With the two ohm load required for these same supposed high power amplifiers, the load resistance is near zero, and so is the resistance to any back emf generated.
Granted 10 useless smps amplifiers would probably be no improvement vs high grade toroidal amps, especially given the fact 99 percent of them have the 500 watt breakdown in the psu explained by speaker power LOl. Along with all the smps complaints, ie the prior user on this thread , ditching off 6 amps as bad. That is a lot of cost and pain to go through looking for a good amplifier. So Nynot is correct in that, IT WOULD DEPEND ON THE AMPLIFIER. as smps is bad all around. But then again IT DEPENDS. is not really an answer.