{"product_id":"professional-series-ported-8-enclosure-sundown-audio-x-series-v-3-8-x-8","title":"Professional Series Ported 8\" Enclosure | Sundown Audio X-Series v.3 8\" X-8","description":"\u003cstyle\u003e.df-wrap{font-family:'Helvetica Neue',Arial,sans-serif;line-height:1.75;color:#d6d3d1;max-width:1100px;margin:0 auto;background:#0c0a09}.df-wrap *{box-sizing:border-box}.df-hero{background:linear-gradient(135deg,#0c0a09 0%,#001a91 100%);padding:54px 36px;text-align:center;color:#fff}.df-hero h2{font-size:2.3em;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;margin:0 0 12px;color:#fff}.df-hero p{font-size:1.1em;font-weight:300;opacity:.93;margin:0 0 22px;color:#d6d3d1}.df-badges{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}.df-badge{background:rgba(91,120,255,.18);border:1px solid #5b78ff;color:#99abff;padding:7px 16px;border-radius:18px;font-size:.8em;font-weight:600}.df-stats{display:flex;flex-wrap:wrap;background:#1c1917}.df-stat{flex:1 1 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class=\"df-wrap\"\u003e\n\n\u003cdiv class=\"df-hero\"\u003e\n  \u003ch2\u003eProline X Professional 8\" Ported\u003c\/h2\u003e\n  \u003cp\u003eA ported eight-inch box built to Sundown's own numbers for the X-Series v.3 X-8\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.48 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 32.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 28.0 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003e2.25\" three-layer baffle\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the X-Series v.3 8\" X-8\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eBuilt in Tennessee\u003c\/span\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-stats\"\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e1.48\u003c\/span\u003e\u003cspan class=\"l\"\u003ecu ft net\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e32.5\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz tuning\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e28.0\u003c\/span\u003e\u003cspan class=\"l\"\u003eHz F3 anechoic\u003c\/span\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"df-stat\"\u003e\n\u003cspan class=\"n\"\u003e25.0\u003c\/span\u003e\u003cspan class=\"l\"\u003esq in port area\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhy this driver is vented at 32.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe Sundown Audio X-Series v.3 8 inch X-8 D2 carries an 8.7 inch frame and a full 7.0 inch mounting depth, and this cabinet gives it 1.475 cubic feet net, vented at 32.5 Hz through a 25.0 square inch port beside the woofer on the front face. F3 lands at 28.0 Hz with 4.38 dB of passband ripple. The 30.0 by 14.0 by 14.0 inch enclosure carries a single 90 degree bend in the port, and the D4 version of this driver shares the same cabinet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThreaded insert kit ships with this box.\u003c\/strong\u003e Sundown Audio does not publish the mounting hole locations for the X-Series v.3 8\" X-8, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer; one kit serves one woofer.\u003c\/p\u003e\n  \u003cp\u003eSundown publishes a Qts of 0.486 for the X-8 D2, and the figure checks out against their own Qes of 0.533 and Qms of 5.542. The gate here is measured at the coil's rated power, 800 W, and the port stays clean past that rating, modeled to 1411 W before mouth velocity becomes the limiting factor. Ripple across the passband holds at 4.38 dB across the full 14.0 inch depth this cabinet gives the motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eWhat makes it Professional\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThree-layer baffle, flush mount\u003c\/h4\u003e\n\u003cp\u003eThree layers of 3\/4 inch Langboard Elite make a 2.25 inch\n    front. The outer layer is routed to the flange, so the woofer sits flush with the face; the two layers behind it\n    carry the mounting hardware and the load.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eSundown Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Sundown Audio mark sits in the outer\n    layer beside the woofer. It is standard on every Professional cabinet.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThreaded insert kit ships with this box\u003c\/h4\u003e\n\u003cp\u003eThreaded insert kit included, inserts NOT pre-installed: the manufacturer publishes no mounting hole locations, so the kit ships with the box for installation when the woofer goes in: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, allen key and gasket tape.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 800 W\u003c\/h4\u003e\n\u003cp\u003eThe 25.0 square inch slot beside the woofer is sized so the\n    channel runs 20.7 metres per second and the mouth 12.8 metres per second at the driver's rated power, under the\n    17 metres per second where a slot starts to chuff. The channel runs 8.25 inches along its wall and turns once along the back wall for another 20.40 inches, which is why a 32.5 Hz tuning fits a 14.00 inch deep box.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhy this is a Professional build\u003c\/h4\u003e\n\u003cp\u003eEvery driver is run through the Performance Optimized wedge and down-fire before this chassis; the Professional box is where a driver lands when that smaller envelope, 30 inches wide and 18 inches deep with a triangular side port, cannot give it what it needs at its rated power. The X-Series v.3 8\" X-8 did not clear the port gate there. The calmest wedge port that fits that envelope is 13.0 square inches at 30.0 by 10.88 by 15.15 inches, and its mouth runs 21.0 metres per second at 800 W against the 17 metres per second line where a port starts to chuff. That port would stay clean to about 524 W. The slot on this box reaches 25.0 square inches and holds the mouth at 12.8 metres per second at 800 W.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat the price covers\u003c\/h4\u003e\n\u003cp\u003eEvery Professional cabinet is priced the same way, by its size: this one is 3.40 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 64 lb parcel and checkout adds nothing. The Performance Optimized 8 inch ported wedge is $329.99. The $112 difference is the larger box and the port this driver needs to run at its rating.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eWhat Sundown Audio recommend\u003c\/h4\u003e\n\u003cp\u003eSundown Audio publish a vented box for the X-Series v.3 8\" X-8 at 0.75 cubic feet on a basis they do not state, tuned to 32.0 Hz. This cabinet holds 1.48 cubic feet net and tunes to 32.5 Hz. They call for a port area of 12-16 sq in. The extra air lowers the low corner rather than raising output at tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e30.00\" W x 14.00\" H x 14.00\" D external. Two windowed braces run front to back either side of the woofer, clearing the cutout by two and a half inches. The box ships dry: polyfill detunes a ported alignment. This is our single-eight ported envelope built around the X-8's own frame and motor depth. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eNothing about this X-8 D2 build needed an estimate: frame, cutout, and mounting depth are Sundown's own published dimensions, and the Qts figure agrees with what its own Qes and Qms predict. The D4 coil shares the same basket and fits this same cabinet without a dimensional change. Sundown Audio does not publish the mounting hole locations for the X-Series v.3 8\" X-8, so we cannot install the threaded inserts before it ships. The threaded insert kit comes in the box instead: 8 to 12 inserts sized to the woofer, the correct drill bit, 2.5 inch allen-head screws, an allen key and woofer gasket tape. You set the inserts when you mount the woofer; one kit serves one woofer.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe numbers to respect\u003c\/h3\u003e\n  \n  \u003cp\u003eSet a 26 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 11.0 mm of its 19.0 mm at 800 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":44853113552985,"sku":"Pro 8-P X8","price":441.99,"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_2e74c538-146e-4110-a663-8883217d2d9b.jpg?v=1788802160","url":"https:\/\/audiointensity.com\/products\/professional-series-ported-8-enclosure-sundown-audio-x-series-v-3-8-x-8","provider":"Audio Intensity","version":"1.0","type":"link"}