This is the woofers' in box impedance measurements. I only lightly filled the enclosures with R13 fiberglass. The Qtc (Dats Qts value) is a little higher than what I modeled. I might try stuffing the enclosures a bit more and see if the Q drops. Either way I'm pretty happy to have a Qtc of about 0.72 without a refrig sized box.
Nice, looks like the Fb of 45Hz or so. Would you be able to block the vent and take a sealed only DATs reading? Interested to see how the measurements change.
Nice! I just remembered I have a pair of those 10" woofers somewhere on the shelf. Now you just did the modeling & proof of concept work for me - Thanks Craig!!
Hi Tom. These woofers measured really great both far field and near field in these enclosures. The Wavecor tweeters do as well. I'm having to work a bit harder than normal to tame these midrange domes though. I'm sure I'll get it figured out.
Thanks Ben. I kinda stole a couple of ideas from Scott Sehlin's rework of the HiVi 3 ways for the mid, then tweeked them for this slightly different mid. I finished up a prototype crossover this morning that I'm pretty happy with. Very nice on-axis FR, phase tracking, and super benign impedance. I'll let my ears steer this project this point forward.
The 830668 was going to be the woofer for Indium 7, but PE wanted me to cut costs (It was closer to $70 a few years ago and PE didn't carry the DMB-A back then, only the more expensive DMN-A). In any event, this is a project I will be very interested to hear if we ever get around to getting back together.
Keep an open mind, but don't let your brain fall out.
Hi Scott. I basically used your circuit topology for the mid and slightly adjusted the values to shape the similar but different driver. Happy to say my prototype xo sports a total of only 12 components, which is pretty low based on my past 3 way projects.
The 830668 woofers are very easy to work with and provide some serious punch and nice lows for such a cost effective 10". I would never hesitate to recommend them. I picked mine up when they were on sale for $50. Not sure the Variovents are even needed. ~ 2 cubic feet, walls lined and lightly stuffed is probably just as good sonically.
Comments
This is the woofers' in box impedance measurements. I only lightly filled the enclosures with R13 fiberglass. The Qtc (Dats Qts value) is a little higher than what I modeled. I might try stuffing the enclosures a bit more and see if the Q drops. Either way I'm pretty happy to have a Qtc of about 0.72 without a refrig sized box.
Nice, looks like the Fb of 45Hz or so. Would you be able to block the vent and take a sealed only DATs reading? Interested to see how the measurements change.
yes, what ani said... thx
Peak will be larger in magnitude, and likely moved up higher frequency.
InDIYana Event Website
Nice! I just remembered I have a pair of those 10" woofers somewhere on the shelf. Now you just did the modeling & proof of concept work for me - Thanks Craig!!
Hi Tom. These woofers measured really great both far field and near field in these enclosures. The Wavecor tweeters do as well. I'm having to work a bit harder than normal to tame these midrange domes though. I'm sure I'll get it figured out.
If it helps....
I recall the DMN-A and DMB-A having similar response properties. A bit of damping at the knees via resistor helps flatten it out.
InDIYana Event Website
Thanks Ben. I kinda stole a couple of ideas from Scott Sehlin's rework of the HiVi 3 ways for the mid, then tweeked them for this slightly different mid. I finished up a prototype crossover this morning that I'm pretty happy with. Very nice on-axis FR, phase tracking, and super benign impedance. I'll let my ears steer this project this point forward.
The 830668 was going to be the woofer for Indium 7, but PE wanted me to cut costs (It was closer to $70 a few years ago and PE didn't carry the DMB-A back then, only the more expensive DMN-A). In any event, this is a project I will be very interested to hear if we ever get around to getting back together.
Sehlin Sound Solutions
Hi Scott. I basically used your circuit topology for the mid and slightly adjusted the values to shape the similar but different driver. Happy to say my prototype xo sports a total of only 12 components, which is pretty low based on my past 3 way projects.
The 830668 woofers are very easy to work with and provide some serious punch and nice lows for such a cost effective 10". I would never hesitate to recommend them. I picked mine up when they were on sale for $50. Not sure the Variovents are even needed. ~ 2 cubic feet, walls lined and lightly stuffed is probably just as good sonically.