Hello! I'm attemtping to design some enclosures for a modest pair of bookshelf speakers.
I've been looking at using the Dayton Audio DC130B-8 5-1/4" Woofer.
I'm hoping for my enclosure to be roughly 9L in volume, with a 6cm diameter, 30cm long vent, tuned to 52hz.
I thought I was on the right track in terms of picking a suitable driver for the volume and accounted for potential chuffing with the vent size+length, however I've run into a major roadblock relating to cone excursion. No matter what I can't seem to get the cone excursion below the x-max limit of 2.5mm which I'm told will distort and potentially damage the driver. I'm testing it at 40 watts which is the RMS given in the spec sheet.
I've even tested a few kits with premade drivers to see if I was entering the driver data wrong and I'm seeing similar issues with the x-max. Am I doing something wrong or is winISD just cooking it a bit? I've gone back and double checked all my driver parameters and tested on a different computer but no dice.
The only solution i've found is to add a high-pass filter at 120hz which will remove the bass entirely and I really don't want to do that.
Is this just an indication that the driver is no good? It makes no sense to me as I can't find any enclosure size that would work for this driver.
Any help would be greatly appreciated.
I've been looking at using the Dayton Audio DC130B-8 5-1/4" Woofer.
I'm hoping for my enclosure to be roughly 9L in volume, with a 6cm diameter, 30cm long vent, tuned to 52hz.
I thought I was on the right track in terms of picking a suitable driver for the volume and accounted for potential chuffing with the vent size+length, however I've run into a major roadblock relating to cone excursion. No matter what I can't seem to get the cone excursion below the x-max limit of 2.5mm which I'm told will distort and potentially damage the driver. I'm testing it at 40 watts which is the RMS given in the spec sheet.
I've even tested a few kits with premade drivers to see if I was entering the driver data wrong and I'm seeing similar issues with the x-max. Am I doing something wrong or is winISD just cooking it a bit? I've gone back and double checked all my driver parameters and tested on a different computer but no dice.
The only solution i've found is to add a high-pass filter at 120hz which will remove the bass entirely and I really don't want to do that.
Is this just an indication that the driver is no good? It makes no sense to me as I can't find any enclosure size that would work for this driver.
Any help would be greatly appreciated.
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Im getting the same results, I dont think these drivers are built to make bass more of a mid the only way would be to restrict it by going to 3 liters sealed but then they will be rolling off from 120hz and keeping it under 10w so not much output. Id imagine even driving these to +/-3~4mm they would be fine mechanically but it would bring some distortion with it(given that Dayton themselves recommend 9ltrs tuned to 54Hz)
Maybe look for another larger/higher xmax driver perhaps if you dont wish to compromise on a little distortion.
Maybe look for another larger/higher xmax driver perhaps if you dont wish to compromise on a little distortion.
Super low eff. combined with minimal Xmax = no useful power handling down low except on the floor in a corner; you'll have to align it to ~ Vb = Vas/1.44, Fb = 1.56x Fs at minimum to get any at low distortion.
I.B. piston calculator for reference.
Note it requires driver effective diameter, so often need to calculate it: dia./cm = (Sd*4/pi)^0.5, cm/2.54 = dia./in
I.B. piston calculator for reference.
Note it requires driver effective diameter, so often need to calculate it: dia./cm = (Sd*4/pi)^0.5, cm/2.54 = dia./in
