The room response gives a picture of the steady state SPL, where sound generation and sound dissipation in the room have reached their equilibrium." -Linkwitz The resulting curves must not be taken as a 1:1 representation of what is heard as loudness at different frequencies. " The room response must be averaged to recognize trends in the summation of direct and reflected signals at the microphone. 2/.1 subs can maximize other location benefits. Plus the location of stereo bass is good for some frequencies and then the additional locations of the. I would take two subs and use them as stands (or right next to)for the Meta's in stereo to create 3 ways 150ish hrz and then add a. Plus really no 5" driver can play kick drums at scale and volume. I don't find this benefit is that subtle. Even ones I have used that show low distortion below 100hrz are still getting close to xmax and a benefit is noticed. I have pretty much settled on 120hrz as the proper point for high passing just about any 5.25" driver. Plus compression - likely a lot, plus likely mechanical noises and possible port noises. Especially as that distortion in the 100-200 range is quite high and below it is really high. The rest of the spectrum will be damaged during bass attack's when that little woofer is just being pounded. "Ĭlick to expand.Yes, though if the driver is distorting badly and especially if is at and beyond xmax, you are getting loads of IMD. Even in the mid-bass at 280 Hz and lower, the noise can be around -14 dB (20% distortion), about half as loud as the music itself, before we hear it. Indeed, the results show we are virtually deaf to these distortions at those frequencies. Put another way, our ability to hear the test frequency noise tones at frequencies of 40 Hz and below is extremely crude. (The noise test tones are noise in the sense that they are not musically related to tones commonly found in musical instruments.) In fact, the noise tones at 20 Hz and 40 Hz had to be increased to levels louder than the music itself before we even noticed them. "While it is has been recognized for years that human hearing is not very sensitive to low bass frequencies, which must be reproduced with much more power and intensity in order to be heard, what these results show is that our detection threshold for noise (made up of harmonically related and non-harmonically related test tones) is practically non-existent at low frequencies. Particularly interesting is the finding on the audibility of low frequency distortions:
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