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The hard way is to buy a SPL meter from Radio Shack (analog's cheaper, digital costs more), and then get a CD with test tones. Stryke offers a CD with 1/3 octave test tones (both sine waves, and warble tones). Then hook up one speaker channel up to the speaker, choose some volume level that...

Does this crossover provide baffle step compensation? That could be why you think the bass is thin (what's really happening is the midrange and tweeter frequency region is too loud compared to the bass region).

Nope, just get the lengths the same.

Using the guy's simple XO network, with the woofers in parallel, try: L2=0.94mH (some close to that value, maybe 1mH) C3=28uF On the tweeter portion, you might want to change the RZ1 anywhere from 2 ohms to 4 ohms (experiment with the padding on the tweeter with this resistor). Keep the...

It'd be close. Supposedly you get a 6dB boost in SPL when you parallel 2 woofer drivers, but toss in the baffle step compensation in real world, it's more like 3-6dB, so it's worth a shot to run the woofers in parallel just to see if XT25 will run with the woofers.

Actually, to go from series to parallel for an electrical second order (given that you know the series values), you divide the inductance by 4 and quadruple the capacitance. That's a decent starting point if you were to mess around with the existing crossover. Then you'd have to fiddle...

Bryan, check out this thread on the XT25/PL18. My only comments on that Speakerworkshop XT25/PL18 design is that I would advise moving the woofers closer together (it's be okay to offset the tweeter off the center line), and front port the enclosure (for maximum placement flexibility), and...