Hey Mike,
Thanks so much for your reply, yeah I re-entered the T/S parameters into WinISD and I seem to be getting the same graphs as you do now. (although I've uploaded my driver file anyways).
You know what I've realised? When I said:
So I will make a start on designing the enclosure now. I'm looking at:
Volume: 170L
Tuning Freq: 21.5Hz
Using a slot port like you mentioned in the other thread. (I'm aware I had chosen an ever-so-slightly higher tuning freq, so will change my slot port accordingly)
If you don't mind, once I have a design or two I will post them here. I don't mean to ask you to do everything for me or anything, but it's so good to have the reassurance that what you're doing has been looked at by someone else! I've heard that there is a 'Golden Ratio' for a rectangular sub enclosure, that minimises standing waves inside it etc. Is this to be followed? I wasn't planning to make a cube or anything but the suggested lengths I got (roughly equal to: 55cm x 88cm x 35cm) which is fine apart from the fact that the driver itself will have to go somewhere and with a diameter of 48cm I worry that I'll be cutting a hole too close to the edge in order to fit it in. By fiddling the numbers to more like: 65 x 78 x 35 I'm getting what's more like a square cross-section. In theory is this ok?
Anyways, gotta go to lectures. I'll get a provisional design or two up for a quick 'yes' or 'no' diagnosis!
Cannot thank you enough for your help!
Sam
Thanks so much for your reply, yeah I re-entered the T/S parameters into WinISD and I seem to be getting the same graphs as you do now. (although I've uploaded my driver file anyways).
You know what I've realised? When I said:
it was YOU that suggested this in this post! Well now that that is cleared up (I can't believe I'd have casually marched ahead with making a sub based on incorrect models had I not posted! Thank goodness for the shack!!!) I think I'm confident that this is what I want to make. It seems to me to be a great driver.
So I will make a start on designing the enclosure now. I'm looking at:
Volume: 170L
Tuning Freq: 21.5Hz
Using a slot port like you mentioned in the other thread. (I'm aware I had chosen an ever-so-slightly higher tuning freq, so will change my slot port accordingly)
If you don't mind, once I have a design or two I will post them here. I don't mean to ask you to do everything for me or anything, but it's so good to have the reassurance that what you're doing has been looked at by someone else! I've heard that there is a 'Golden Ratio' for a rectangular sub enclosure, that minimises standing waves inside it etc. Is this to be followed? I wasn't planning to make a cube or anything but the suggested lengths I got (roughly equal to: 55cm x 88cm x 35cm) which is fine apart from the fact that the driver itself will have to go somewhere and with a diameter of 48cm I worry that I'll be cutting a hole too close to the edge in order to fit it in. By fiddling the numbers to more like: 65 x 78 x 35 I'm getting what's more like a square cross-section. In theory is this ok?
Anyways, gotta go to lectures. I'll get a provisional design or two up for a quick 'yes' or 'no' diagnosis!
Cannot thank you enough for your help!
Sam
