Originally Posted by MKtheater
bear, you thinking the OS will close the gap on the 4000 at 16hz will not happen.
I'll share my reasoning here. It might not close all of it, but it WILL close alot of it. It's a fact. Exactly how much is the question. Check this out:
Ok. CAP4000 maximum possible output at 16 Hz: 116 dB. It doesn't go any higher than that, as it is using every drop of power the amp can supply. So output doesn't go any higher above the CEA2010 number captured. 116 dB. Period.
OS LFU. 16 Hz CEA2010
output: 101.5 dB. So the Cap4000 has 15 dB more output here, right? Wrong. The OS does not stop getting louder at 16 Hz when it reaches this output level. It keeps on going up to 109 dB, albeit with high distortion. Now we all know that this distortion will be greatly reduced in room(same as the Cap's 116 dB distortion will be lowered). But the point is, the apparent
15 dB difference is now down to 7 or so dB. That's a fact. It's still double the output, yes, but a far cry from 15 dB.
Now, we know both subs will benefit equally from room gain. That's understood. However, proper placement in room effectively lengthens the horn. This effectively lowers the tune of the horn, which as we know, provides a massive increase in output...up to 4x. Now will the OS get another 7 dB at 16 Hz due to this? I don't know. Maybe. Maybe not. Maybe less. Maybe more. But its a fact that there will be at least some increase to 16 Hz output since the horn will now extend lower in room. So it's a fact that there will be somewhere less than 7 dB difference in room, in real life conditions, between the two subs at 16 Hz.
This is the point I've been making, and I think it helps to explain how, despite what appears
, to be a 15 dB difference in output at a frequency that is VERY noticeable when played at high levels(16 Hz), how the OS can be subjectively preferred when compared to the 4000. I understand that part of it is the output advantage the horn has up high. I don't dispute that. But I think part is that there is not as big of an output disparity at 16 Hz in room as CEA2010 would have some believe.
And this difference is much less than 15 dB CEA2010 shows.