I was wondering where the paterns best match. 1400? The Beyma is the one in the 80x30 waveguide. I assume the narrower patter lets the AE run a bit higher than with a SEOS 12/15 and a compression driver. Where has the TD12m been used to with a SEOS15 or SEOS12?
Thanks in advance
Thanks in advance
The TD12m appears to be best matched to the Seos 12 to the 1200-1300hz area. Would the LO12 behave similarly?
The TD12M and LO12 should behave similarly, the cone, phaseplug, and surround is the same, basket looks standard AE too.
LO12 is underhung, dual coil, no apollo option, softer suspension, higher qts. THD goes up faster beyond a certain point.
TD12M is overhung, higher sensitivity, lower qts, less xmax, etc. THD has a more steady increase with excursion.
They will prefer 2 relatively different enclosures.
old measurements can give you some sense of the differences.
https://sites.google.com/site/drivervault/driver-measurements/15
https://sites.google.com/site/drivervault/driver-measurements/tang-band-75-1558se
IMO with a 12" a higher XO is likely not desireable.
You can get the 150/200 to perform better down low, reduce distortion, 1,6k resonance, and better dispersion characteristics, with some diy mods easily found on here if you search a bit.
TPL will have larger CTC, more narrow and pronounced vertical directivity, also requires the midbass to go higher up, with original horn.
LO12 is underhung, dual coil, no apollo option, softer suspension, higher qts. THD goes up faster beyond a certain point.
TD12M is overhung, higher sensitivity, lower qts, less xmax, etc. THD has a more steady increase with excursion.
They will prefer 2 relatively different enclosures.
old measurements can give you some sense of the differences.
https://sites.google.com/site/drivervault/driver-measurements/15
https://sites.google.com/site/drivervault/driver-measurements/tang-band-75-1558se
IMO with a 12" a higher XO is likely not desireable.
You can get the 150/200 to perform better down low, reduce distortion, 1,6k resonance, and better dispersion characteristics, with some diy mods easily found on here if you search a bit.
TPL will have larger CTC, more narrow and pronounced vertical directivity, also requires the midbass to go higher up, with original horn.
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Here my measurements for both (there are two lines, as one was taken in far field, and the other using Ground plane):
TPL-150H:
And for the AE TD12M:
I've crossed both using an active LR24 @ 1500Hz.
TPL-150H:
And for the AE TD12M:
I've crossed both using an active LR24 @ 1500Hz.
Thank you for the reply.
At what frequency does the dispersion of the TD12m narrow to 90 degrees?
At what frequency does the dispersion of the TD12m narrow to 80 degrees?
At what frequency does the dispersion of the TD12m narrow to 90 degrees?
At what frequency does the dispersion of the TD12m narrow to 80 degrees?
I was only able to take measurements from 0° to 50°, they were taken on Ground Plane (the boxes were too heavy to be able to take reliable far field measurements in a secure way):
Please find them here: https://easyupload.io/urj57k
Please find them here: https://easyupload.io/urj57k
In theory:
Sd = 531 cm^2/~82.305"^2
dia = sqrt(82.305*4/pi) = 10.237"
10^6/(10.237*90) = ~1085 Hz -F6
10^6/(10.237*80) = ~1221 Hz -F6
I have this combo (seos15), I cross at ~1250Hz
here's the TD12M normalised, contour lines are every 3dB. I can share the measurement data if you want.