I recently started this thread asking about how to build a vented box for some alpine drivers.
Some people recommended here and on Reddit that I go for a sealed box instead.
The manufacturer recommends a 0.85 ft³ box as the ideal of a recommended range of 0.5-1.5ft³
WinISD tells me F3 will be 45hz for those sizes, though at 20Hz, a 50L box will be around -14dB and a 35L box will be at -15.5dB. Qtc will be 0.772 for the small box and 0.709 for a 50L one.
50L is not much larger than the recommended 35, but it's a bit larger than the recommended maximum 1.5ft3 (42L). And it fits the mythical 0.707 Qtc
Is this a reasonable box for a HT system? I plan on having 2 of them in a small room. Considering room gain and 500W RMS to each, the total SPL at 20Hz should be 107dB at 20hz (115dB after 45Hz)
Some people recommended here and on Reddit that I go for a sealed box instead.
The manufacturer recommends a 0.85 ft³ box as the ideal of a recommended range of 0.5-1.5ft³
WinISD tells me F3 will be 45hz for those sizes, though at 20Hz, a 50L box will be around -14dB and a 35L box will be at -15.5dB. Qtc will be 0.772 for the small box and 0.709 for a 50L one.
50L is not much larger than the recommended 35, but it's a bit larger than the recommended maximum 1.5ft3 (42L). And it fits the mythical 0.707 Qtc
Is this a reasonable box for a HT system? I plan on having 2 of them in a small room. Considering room gain and 500W RMS to each, the total SPL at 20Hz should be 107dB at 20hz (115dB after 45Hz)
The manufacturer's recommendation is for car audio use.
In any case, I use Type Rs in my car, in a sealed box that's basically double the size that the manufacturer recommends for them. They've been in that box for years now and work fine.
In any case, I use Type Rs in my car, in a sealed box that's basically double the size that the manufacturer recommends for them. They've been in that box for years now and work fine.
Yes that's what I suspect, these figures are usually for car audio use. And I wouldn't be surprised if they were undersized to claim "they use up little space".
One thing I noticed is that sensitivity in Type R is 2dB lower than type S. While in magnitude plots Type Rs come out 2dB ahead, in SPL plots, R and S perform basically the same.
One thing I noticed is that sensitivity in Type R is 2dB lower than type S. While in magnitude plots Type Rs come out 2dB ahead, in SPL plots, R and S perform basically the same.
Longer Xmax = Heaver moving mass = less efficient driver. Peak output of the Type R should be higher because of its greater Xmax.