{"product_id":"performance-optimized-down-fire-sealed-10-enclosure-focal-flax-evo-p-25-fse","title":"Performance Optimized Down Fire Sealed 10\" Enclosure | Focal Flax Evo P 25 FSE","description":"\u003cp\u003eThe \u003cstrong\u003ePerformance Optimized Down Fire Sealed 10\" Enclosure for the Focal Flax Evo P 25 FSE\u003c\/strong\u003e is a low-profile sealed cabinet built around Focal's 10 inch flax-cone subwoofer. At 6.125 inches tall on a 30 by 15 inch footprint, it fits under seats and in cargo wells that will not accept a conventional box.\u003c\/p\u003e\u003cp\u003eThe \u003cstrong\u003eFocal P 25 FSE\u003c\/strong\u003e is a 4Ω single voice coil subwoofer rated 280 watts RMS and 560 watts maximum, with 11mm of Xmax and 346 cm² of cone area. The construction is what sets Focal apart: a \u003cstrong\u003eflax fiber cone\u003c\/strong\u003e sandwiched in their Flax Evo layup, rubber surround, and a 38mm four-layer copper voice coil on a glass fiber former. Flax is Focal's alternative to the usual polypropylene or treated paper, chosen for a favorable stiffness-to-mass ratio and internal damping.\u003c\/p\u003e\u003cp\u003eThe 0.80 cubic foot net volume produces \u003cstrong\u003eQtc 1.131 with a predicted F3 of 32.6 Hz\u003c\/strong\u003e, computed from Focal's published Thiele-Small parameters of Fs 30 Hz, Qts 0.78 and Vas 25 liters.\u003c\/p\u003e\u003cp\u003eTwo things worth stating plainly.\u003c\/p\u003e\u003cp\u003eFirst, with a free-air Qts of 0.78, \u003cstrong\u003esystem Qtc cannot fall below 0.78 in any sealed enclosure\u003c\/strong\u003e regardless of volume. This driver is mildly underdamped in any sealed box, producing a modest lift near the corner frequency. That is the P 25 FSE's character, not a limitation of this cabinet. We build at 0.80 net because the returns flatten past that: going to a full cubic foot improves Qtc by only 0.03 and F3 by about 1 Hz.\u003c\/p\u003e\u003cp\u003eSecond, the figures above are \u003cstrong\u003ecomputed from the T\/S parameters Focal publishes\u003c\/strong\u003e, and they do not match the F3 values in Focal's suggested application table. Focal lists 37.5 Hz at 12 liters and 34 Hz at 18 liters. Running their own Qts and Vas through standard sealed box math at those volumes gives roughly 49 and 46 Hz instead. Notably, \u003cstrong\u003eFocal's own published frequency response graph agrees with the computed figures\u003c\/strong\u003e rather than with their table, showing output rolling away below roughly 45 Hz. We publish what the driver data and the measured response both indicate.\u003c\/p\u003e\u003cp\u003eFocal does publish driver displacement at 0.07 cubic feet, which many manufacturers in this category omit entirely, and it is accounted for in the net volume above.\u003c\/p\u003e\u003cp\u003eFiring down into the floor, the sealed rolloff meets rising cabin gain below 60 Hz, and in-car response extends well below the anechoic figure.\u003c\/p\u003e\u003cp\u003eConstruction is the full Proline X Performance Optimized platform: ShopSabre CNC-cut Langboard Elite MDF with \u003cstrong\u003eV-groove and dado joinery\u003c\/strong\u003e, perimeter cross-bracing, and a \u003cstrong\u003edouble-layer 1.5 inch front baffle\u003c\/strong\u003e (two 3\/4 inch sheets bonded) for maximum baffle rigidity and driver isolation. Corners are square on Down Fire cabinets. The driver fires down into the floor with the terminal cup \u003cstrong\u003eside mounted\u003c\/strong\u003e, keeping the connection accessible with the cabinet in place. Terminal cup is our Proline X ABS\/carbon fiber composite pre-wired with 12 gauge OFC.\u003c\/p\u003e\u003cp\u003eBring your own Focal P 25 FSE. Single voice coil at 4 ohms nominal, so there is no wiring configuration to choose at the driver.\u003c\/p\u003e\u003cp\u003eManufactured in Tullahoma, Tennessee. 1-year enclosure warranty.\u003c\/p\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44540414885977,"sku":"PO 10-S DF FSE","price":229.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/proline-x-micro-series-dual-15-sealed-enclosure-built-for-resonix-gus-15subwoofer-enclosuresproline-x-9360178_f63e1c55-9a51-45a0-b130-97719182d79d.jpg?v=1787114350","url":"https:\/\/audiointensity.com\/products\/performance-optimized-down-fire-sealed-10-enclosure-focal-flax-evo-p-25-fse","provider":"Audio Intensity","version":"1.0","type":"link"}