To reverse engineet give the t/s specs of original or similarly the specs net/vol for the enclosure and tuning (size l/d for the number of ports it has.
Not to be rude, but are you just naming a driver you're previously purchased, or selecting one based on some design criteria?
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I'll get that info
I'll write to TOA and try to get the T/S parameters. The subs won't be delivered for a week or ten days, and I will measure them then and post that data.
I use Fanes in the 18" CV Earthquakes and 18" TurboSound folded horns and have no complaints.
Thanks for the responses; I'll post that info when I have it.
I'll write to TOA and try to get the T/S parameters. The subs won't be delivered for a week or ten days, and I will measure them then and post that data.
I use Fanes in the 18" CV Earthquakes and 18" TurboSound folded horns and have no complaints.
Thanks for the responses; I'll post that info when I have it.
Looking at the curves using the direct input, I suggest just designing the box as an ordinary vented system.
The panel in front of the driver acts like a low-pass-filter at some point, and has a small bandpass gain before it cuts off.
The TOA 38-SD is another interesting box.
The panel in front of the driver acts like a low-pass-filter at some point, and has a small bandpass gain before it cuts off.
The TOA 38-SD is another interesting box.
"Those DI 160Hz 18dB Xover graphs don't look quite right !"
I agree.
The external filter may be knocking down some sort of bandpass peak, no way to know at this point.
I agree.
The external filter may be knocking down some sort of bandpass peak, no way to know at this point.
quick update
TOA doesn't have the TS specs. Probably in a Japanese vault.
I have received the pair of subs and have one open for measuring. It's a little complicated and it may take me another day or two to get everything measured and written down. I just started school and it's somewhat time consuming.
Here is a picture of the interior. Is this a series tuned 5th order bandpass? Or what?
TOA doesn't have the TS specs. Probably in a Japanese vault.
I have received the pair of subs and have one open for measuring. It's a little complicated and it may take me another day or two to get everything measured and written down. I just started school and it's somewhat time consuming.
Here is a picture of the interior. Is this a series tuned 5th order bandpass? Or what?
TOA says it is a simple vented box when used as a sub.
"Looking at the curves using the direct input, I suggest just designing the box as an ordinary vented system.
The panel in front of the driver acts like a low-pass-filter at some point, and has a small bandpass gain before it cuts off."
Measure the impedance peaks in the box to determine the tuning frequency, measure the driver T/S parameters, calculate the net volume of the box.
"Looking at the curves using the direct input, I suggest just designing the box as an ordinary vented system.
The panel in front of the driver acts like a low-pass-filter at some point, and has a small bandpass gain before it cuts off."
Measure the impedance peaks in the box to determine the tuning frequency, measure the driver T/S parameters, calculate the net volume of the box.
I went with the Eminence 3015LF4
I figured out how to fool around with a few different speaker simulatin' programs. The cabinet is more or less incapable of producing less than ~50 Hz, so I went with the Eminence 3015LF4 which is similarly incapable.
I run 4 of these subs with an Inuke 3000DSP which pretty handily delivers ~500 watts to each sub. The sound is pretty darn decent for subs that I can move myself.
The 3015LF4 have a larger diameter than the stock drivers from TOA so I used PVC spacers to keep the cone from banging against the cabinet.
I figured out how to fool around with a few different speaker simulatin' programs. The cabinet is more or less incapable of producing less than ~50 Hz, so I went with the Eminence 3015LF4 which is similarly incapable.
I run 4 of these subs with an Inuke 3000DSP which pretty handily delivers ~500 watts to each sub. The sound is pretty darn decent for subs that I can move myself.
The 3015LF4 have a larger diameter than the stock drivers from TOA so I used PVC spacers to keep the cone from banging against the cabinet.
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