The 8 ohm is a good problem to have, IMHO. I use them as woofers, paired/wired in parallel-
This is fully active 3-way crossover, hand-tuned by DSP, so it has an unfair advantage (smoother than most passive speakers)
But in a passive design, after baffle step losses, in a 3.5 cu. ft. cabinet, one can still achieve a sensitivity ~92 dB / 2.83V (4 ohm), with an F10 of 32 Hz, all whilst having a baffle that’s relatively slim (13”)
Looks great, what’s the box model you are using for the 3 way? and/or do you have a link to your desing?
Vituixcad2 → Tools → Enclosure
Gray line is 2pi (ala winISD), brown line takes into account baffle shape and passive components, cyan is max SPL taking into account excursion, power and cabinet volume.
Since it uses a midrange that’s not available off-the-shelf, I didn’t bother with a writeup.
Unit-A-DATS.docx (51.8 KB)
T/S before burnin was almost identical with posted parameters.
After burnin, they changed a slight bit.
QMS a good bit higher than stated, which I consider a good thing.
Posted this on my tube amp thread, but could do here too:
50kohm Alps pots for $6.29ea after sale price and 20% off promo code (probably ends after today so snap em up!)
Fosi Audio ZA3 with 48V PS - Restocked - $107
83 in stock!!
Now you can choose to Zing1 or Zing2! 
Interesting off-axis response on that one.
I wonder if the off-axis behavior is due to the diffuser. Also, happy 9th birthday to the tweeter in the PE photoshoot.
Happy Birthday and reavailability!
Beastmode for $27 at Digikey. Beware, they apply a tariff surcharge on it.
Newark had (apparently) some large film caps at discount. While they are currently 87 bucks each, they cost me 72 bucks shipped for a pair while under the sale timespan. If I had known the sale would be over so soon, I would have posted earlier, however, I waited until arrival to say anything. It is however worth noting that Newark does this periodically to eliminate old stock. The link was brought to my attention on diyaudio. If you keep your eyes peeled, these kind of deals should come around.
Now that I have said all that, I was very surprised when these arrived in a box 4x the size in which I felt they should be contained. The image on Newark’s site shows the standard 3” diameter Kemet capacitor of which we likely are all familiar.
I open the 4x large box to find 2 smaller boxes, and in those boxes were Manilla padded envelopes. The envelopes contained the small bags of connection bolts and washers, and the shockingly largest film caps I’ve ever purchased that approximate small coffee cans.
Approximately 5.5” D x 5.5” long, these behemoths measure 444uF and 447uF which is close enough to spec value of 460uF at 10% tolerance. I did not expect them to be quite this big. The price was just too good to pass up. Whoops. I’ve built speakers smaller than these.
What you going to build using these?
Something that goes to 11
Something much larger than his usual inimitably compact designs?
I bought them for a future Passive Assist design.
You should build a speaker out of a tube the same diameter and use them as a base
Damn - those caps are rated for transmitter type voltages!
