http://seas.no/images/stories/vintage/pdfdataheet/h0352_p17rcy.pdf
is that possible from this datasheet?
would super duper appreciate if anyone could do that.
is that possible from this datasheet?
would super duper appreciate if anyone could do that.
angle?
pardon my ignorance.
you mean on axis?
i would think yeah to match with the files for my tweeters.
I made a couple of kits with those speakers back in the days, so here they are.
Cheers
Unfortunately, Seas measures their drivers mounted on a box and therefore the measurements include baffle diffraction effects. The problem is that they don't bother telling you the baffle dimensions nor the driver locations so you can't remove those effects from the measurements and then add in the different diffraction effects from your own speaker.
So you'd be better off actually using REW measurements of your actual woofers mounted on the baffle without the xo attached. You can then import those into your xo program and play with them until your heart's content. Same thing with your new tweeter once you get it. And for more accuracy, you should be using your own impedance measurements as well.
Not being 100% certain what you have learned about measuring, just in case here is an excellent tutorial:
https://app.box.com/s/fefis558wna1d6pd07r3
FPGraph tracer is also a great suggestion for sims using spec sheet info.
So you'd be better off actually using REW measurements of your actual woofers mounted on the baffle without the xo attached. You can then import those into your xo program and play with them until your heart's content. Same thing with your new tweeter once you get it. And for more accuracy, you should be using your own impedance measurements as well.
Not being 100% certain what you have learned about measuring, just in case here is an excellent tutorial:
https://app.box.com/s/fefis558wna1d6pd07r3
FPGraph tracer is also a great suggestion for sims using spec sheet info.
And to add 1 more thing...
you'll also need to get the right acoustic delay/acoustic center data correct for your drivers as well.
Another tutorial: https://audiojudgement.com/speaker-acoustic-center/
That's for a 3-way speaker, so just skip the extra step for the extra woofer.
And for your MTM, because the 2 woofers are in the same chamber and share the same xo, you'll want to treat the acoustic center, the FR and the impedance measurements for them as a pair despite the fact that they are different drivers. So always measure them wired together in other words for all farfield measurements. For nearfield woofer measurements, your speaker presents a bit of a complication, so you can measure them separately if you want but in reality for the purposes of a 2-way xo with the xo frequency up fairly high, you don't actually need accurate measurements down much below about 200Hz or so.
Cheers
you'll also need to get the right acoustic delay/acoustic center data correct for your drivers as well.
Another tutorial: https://audiojudgement.com/speaker-acoustic-center/
That's for a 3-way speaker, so just skip the extra step for the extra woofer.
And for your MTM, because the 2 woofers are in the same chamber and share the same xo, you'll want to treat the acoustic center, the FR and the impedance measurements for them as a pair despite the fact that they are different drivers. So always measure them wired together in other words for all farfield measurements. For nearfield woofer measurements, your speaker presents a bit of a complication, so you can measure them separately if you want but in reality for the purposes of a 2-way xo with the xo frequency up fairly high, you don't actually need accurate measurements down much below about 200Hz or so.
Cheers
Ah......., thanks for that markbakk. That is the very first time I have seen that info or that anyone has bothered to provide it. Renders my previous criticism moot. Obviously. Still involves a bit more work than with other drivers that provide infinite baffle measurements though. <<scratches head and wonders why....?>>
Agree with Markbakk. Anyway, Seas specifies in every data sheets the size of the test boxes (in this case 12L), the voltage applied and the distance of the mic from the DUT (2V @ 0.5m): in this case it is necessary to scale 3 dB to be compliant with measurements with 2.83V @ 1m.