{"product_id":"professional-series-ported-15-enclosure-dayton-audio-reference-rss390hf","title":"Dayton Audio Reference RSS390HF Box: Ported 15\" Professional Series Enclosure","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 15\" Ported\u003c\/h2\u003e\n  \u003cp\u003eOne Reference RSS390HF in a front-firing Professional box, vented at 27.5 Hz on a three-layer flush-mount baffle\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e2.06 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 27.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 33.8 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 Reference RSS390HF\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\"\u003e2.06\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\"\u003e27.5\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\"\u003e33.8\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\"\u003e20.6\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 27.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe RSS390HF is the 15 inch from Dayton's Reference HF (high-fidelity) line: 19.5 Hz, a Qts of 0.43, 212 litres of Vas and 14 mm of excursion, rated 500 W RMS. This cabinet gives it 2.06 cubic feet net behind a 2.25 inch three-layer baffle, vented at 27.5 Hz through a 20.6 square inch slot beside the woofer, for an anechoic F3 of 33.8 Hz in a 36 by 18 by 11.5 inch front-firing box.\u003c\/p\u003e\n  \u003cp\u003eThe slot is gated at 600 W: the channel runs 16.0 m\/s and the mouth 8.4, and the cone peaks at 7.4 of its 14 mm with the subsonic filter in place. Passband ripple is 2.1 dB.\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\u003eDayton Audio logo acrylic\u003c\/h4\u003e\n\u003cp\u003eA glossy black acrylic insert with the Dayton 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\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eThreaded inserts pressed into the baffle on the published 14.488 inch bolt circle, stainless machine screws included.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003ePort gated at 600 W\u003c\/h4\u003e\n\u003cp\u003eThe 20.6 square inch slot beside the woofer is sized so the\n    channel runs 16.0 metres per second and the mouth 8.4 metres per second at 1.2 times the driver's rating, under the\n    17 metres per second where a slot starts to chuff. The channel runs 6.50 inches along its wall and turns once along the back wall for another 15.95 inches, which is why a 27.5 Hz tuning fits an 11.50 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\u003eThe Reference RSS390HF also builds in the Performance Optimized ported wedge, the smaller and cheaper box. The Professional cabinet is the step up for it: a 2.25 inch three-layer baffle with the woofer flush in the outer layer, and a slot port gated at 600 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 4.31 cubic feet outside. Delivery to the 48 states is inside the price; it ships as a 62 lb parcel and checkout adds nothing. The Performance Optimized 15 inch ported wedge is $519.99. The $-24 difference is the larger box and the port this driver needs to run at its rating.\u003c\/p\u003e\n\u003c\/div\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eThe cabinet\u003c\/h3\u003e\n  \u003cp\u003e36.00\" W x 18.00\" H x 11.50\" 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. Inside the Professional envelope for a single 15, 36 inches wide, 18 tall and 11.5 deep. 15.291 inch frame, flush in the outer baffle layer, 14.008 inch cutout, 7.01 inches of mounting depth. Dayton print the bolt circle, so the threaded inserts are pressed at the shop. It ships as a parcel.\u003c\/p\u003e\n  \u003cp\u003eDayton publish a complete parameter table for the RSS390HF-4 that holds together on Qts, moving mass and motor strength. Mounting depth is the overall depth on Dayton's drawing, flange included, so it errs deep. Displacement is not published; 0.154 cubic feet is our estimate. Tuning includes a 1.5 Hz fold loss that is an estimate, not a bench measurement.\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 22 Hz subsonic filter, 24 dB per octave. Below tuning the vent stops loading the cone; with the filter in\n  place the cone reaches 7.4 mm of its 14.0 mm at 600 W.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Default Title","offer_id":47424893386841,"sku":"Pro 15-P RSS390HF","price":495.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/Pro_15-P_RSS390HF_Front.jpg?v=1791685805","url":"https:\/\/audiointensity.com\/products\/professional-series-ported-15-enclosure-dayton-audio-reference-rss390hf","provider":"Audio Intensity","version":"1.0","type":"link"}