Looks like an inductor found its way into the system...
Two, actually.
That woofer is doing nothing but trash talk above 4 kHz in the stock design, as was variously indicated in the curves posted earlier in the thread. The woofer is the problem, how it was used to accomplish minimum system cost, not the tweeter. There's no point pretending it's a full-range driver that could put Fostex, Lowther, et al. out of business. I yanked it down hard two-pole with 1 mH and 6.8 uF.
The filterless tweeter measurements revealed a competent tweeter that would play down to, uhmm, 4 kHz. That's near its cutoff, so I chose where to actually do it according to the curve (look for the "knee" there,) and used two-pole on it, as well, 4.7 uF and 0.5 mH. Its power-handling capacity is unknown, but it's ~4 dB more efficient than the lowpassed woofer, so I've padded it down accordingly; it's getting but ~40% of full power.
As shown in the resultant frequency response, these are now playing +/- 2 dB, and they sound like mini-monitors. The off-axis response is very much improved, as well. I used Solens, so they have a pleasant "crispness" to them; with Daytons, they'd be a bit more mellow. I don't think I'd try to rock the house with these until we find out more about the capacity of the tweeter. As mentioned earlier, Tang Band is the backup should we smoke them.
I like the bass with the port closed, actually; it reaches a little lower, and with boundary reinforcement, it sounds even better. R/S advertised them as "Good midrange sound," their way of saying they need subs. Yes, they do, either way. The regular price was $39.99 the pair according to the printed tag attached to mine.
It was late when I completed this, obviously. I'll draw up the schematic and post some additional measurements later today. The mods are $20 - $25 per speaker, depending upon component choices; less if you happen have some of the parts laying around like most certifiable AKers.... :thmbsp:
