PRODUCT PAGE: http://www.diysoundgroup.com/waveguide-speaker-kits/fusion-10.html FUSION 10 Pure mkii I'd like to thank Erich and all the people involved in designing the SEOS (zilch, Audio Josh, Coctostand, Penngray, LTD02, etc.) Speaker Summary This speaker was designed to provide high efficiency and output, while achieving linear axial and polar response, all on a reasonable budget and compact size. What does that mean? Solid HT performance in a living room friendly size on an average budget. This speaker covers all the usual requirements of someone with a normal home and income. Alternatively, it's great as a no compromise surround for those with fully dedicated, large, HTs. The sound is clear at low levels and when on screen action is demanding and loud. It has uniform response over a wide range of angles, both horizontal and vertical. Recommended for use with a subwoofer(s) as bass below 80hz was traded in favour of higher efficiency and output. FAQ Q. What changed in this speaker from the old version? A. It went from the SEOS12 to the SEOS10 to allow for a narrower cabinet. There's no significant performance difference. Q. What is the impedance? A. Nominal 8ohms. Q. What is the power handling? A. 200 watts. Q. What is the max peak output? A. 118db @ 1m. For a typical 12ft listening distance, it would be 107db, although the room would provide an apparent SPL of about 110db. Q. What subwoofer XO do you recommend? A. Start with 80hz, but I always recommend measuring the results in your room with your sub(s) and adjust from there. Less than 60hz is not recommended. Q. Can I make the box smaller or bigger? A. The net volume should be between 20 and 30L, however this woofer is quite flexible to box size changes. Q. What should I use to stuff the box? A. I prefer polyfill or insulation. Line the walls with a couple inches thick, but be careful to keep away from the port openings. It's ok if some area doesn't get covered. Q. Is there any way to improve the performance of this speaker with a better compression driver or woofer or cross over parts? A. Not without a total redesign. The performance gain would be very small. Better off going with a different speaker altogether.