{"product_id":"performance-optimized-wedge-ported-12-enclosure-prodigy-nb3-12","title":"Performance Optimized Wedge Ported 12\" Enclosure | Prodigy NB3-12","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 Performance Optimized Wedge 12\" Ported\u003c\/h2\u003e\n  \u003cp\u003e800 watts on a 3.4 inch motor, vented at 37.5 Hz in 1.21 cubic feet on 1.19 dB of ripple\u003c\/p\u003e\n  \u003cdiv class=\"df-badges\"\u003e\n    \u003cspan class=\"df-badge\"\u003e1.21 cu ft net\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eTuned 37.5 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eF3 34.7 Hz\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eSide slot port\u003c\/span\u003e\n    \u003cspan class=\"df-badge\"\u003eCut for the Prodigy NB3-12\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\"\u003e1.21\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\"\u003e37.5\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\"\u003e34.7\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\"\u003e19.9\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 37.5 Hz\u003c\/h3\u003e\n  \u003cp\u003eThe NB3-12 is a 36.2 Hz motor with a 0.48 Qts, 29.7 litres of Vas and 800 watts on 3.38 inches of mounting depth, and the wedge gives it 1.21 cubic feet net vented at 37.5 Hz through a 19.9 square inch port. The cabinet is 30 inches wide, 15.5 tall, 7.88 inches at the top and 13.52 at the base.\u003c\/p\u003e\n  \u003cp\u003e37.5 Hz puts the anechoic F3 at 34.7 Hz on 1.19 dB of ripple, and in the car it spreads 4.31 dB across 25 to 60 Hz, a third of a decibel over the 4 dB line the rest of the range holds; the ported Down Fire we build for this driver reads 3.39 and the NB2-12 in this line 1.69. The port takes 24.49 of the 25.32 inches available and runs at 22.8 metres per second in the channel against a 23.2 limit at 800 watts, 14.4 at the rounded mouth.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eTrunk-load wedge, explained\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe 20 degree face is the seat side\u003c\/h4\u003e\n\u003cp\u003eA factory rear seat back\n    leans about 20 degrees off vertical. The wedge's raked rear panel matches that lean and tucks\n    against it, so the cabinet uses the triangle of trunk floor a square box wastes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eThe driver fires rearward\u003c\/h4\u003e\n\u003cp\u003eThe baffle stays vertical and faces\n    the trunk opening. The trunk acts as the acoustic extension into the cabin; nothing about\n    the driver is angled.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e13.52 inches at the base, 7.88 at the top\u003c\/h4\u003e\n\u003cp\u003eThe port panel needs 5.82 inches of top depth to seat a 6.50 inch leg, against 4.72 for the magnet alone, and the base lands at 13.52, two inches under the 15.5 inch height. 4.02 inches of flat floor stay clear in front of the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003e30.00 inches wide\u003c\/h4\u003e\n\u003cp\u003eWidth is the wedge's free dimension and it\n    buys two things at once here: airspace, and port length, because the port runs the full\n    width of the box.\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 port is the product\u003c\/h3\u003e\n  \u003cp\u003eThe port is a triangular slot in the bottom-rear corner. The floor and the raked back wall\n  are two of its three sides; the third is a single panel bevelled to sit flush against both.\n  It runs across the cabinet, opens into the box at the far end and exits through the side\n  panel: a straight run with no bend, 24.49 inches of centreline path.\u003c\/p\u003e\n  \u003cp\u003eThe channel is an isosceles triangle with 6.50 inch legs, 19.9 square inches, running at\n  22.8 metres per second at the tuning frequency. The mouth is that same triangle cut through\n  the side panel with its three edges rounded over at 1\/2 inch, so the opening at the face is\n  31.4 square inches and air leaves it at 14.4 metres per second, against the 17.0 metre per\n  second threshold where a slot port starts to chuff. The panel's throat end carries a 3\/8 inch\n  roundover for the same reason.\u003c\/p\u003e\n  \u003cdiv class=\"df-highlight\"\u003e\n    \u003cp\u003e\u003cstrong\u003eThis enclosure ships dry.\u003c\/strong\u003e Polyfill goes in every sealed Proline X cabinet\n    we build. It does not go in this one. Damping material changes the effective volume the\n    port is tuned against, which moves the tuning away from the 37.5 Hz the port was cut for.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eRun a subsonic filter\u003c\/h3\u003e\n  \u003cp\u003eBelow tuning the port stops loading the cone and excursion climbs without limit toward DC,\n  so a 30 Hz high-pass at 24 dB per octave is part of the specification. Set it and the same\n  cabinet takes substantially more power for the same cone travel.\u003c\/p\u003e\n  \u003cp\u003eEvery wattage on the Performance Graphs tab is a mechanical limit, the power at which the\n  cone reaches the end of its linear travel in this box. What the voice coil can dissipate as\n  heat is a separate ceiling set by Prodigy.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003eCut for this driver, not for a catalogue\u003c\/h3\u003e\n  \u003cdiv class=\"df-grid\"\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cp\u003eCut to Prodigy's published 10.875 inch cutout through a\n    double-layer 1.5 inch baffle, with a cosmetic front layer routed for the acrylic insert.\n    Threaded inserts at every mounting location.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eClearance\u003c\/h4\u003e\n\u003cp\u003eProdigy quote Xmax at 70 percent BL, so the printed 11 mm is derated to 9.3; the cone uses 7.5 of that at 800 watts with the subsonic filter set, 81 percent of the travel at rated power, so the filter is not optional. Prodigy publish an Mms of 189 g where their own Fs, Vas and Sd imply about 256; the cabinet is sized on the pessimistic route. We also build this driver as a 1.02 cubic foot sealed Down Fire, and the graphs tab compares the two.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eBraced\u003c\/h4\u003e\n\u003cp\u003eTwo windowed C braces run the cabinet profile at the third points of the width and seat on the port panel; the windows keep the cavity one chamber.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"df-card\"\u003e\n\u003ch4\u003eJoinery\u003c\/h4\u003e\n\u003cp\u003eV-groove and dado throughout, 0.75 inch Langboard\n    Elite MDF, the shell folded from one strip with the sides dropped into dados and the port\n    panel seated in dados of its own.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-section\"\u003e\n  \u003ch3\u003ePower, wiring and warranty\u003c\/h3\u003e\n  \u003cp\u003eProdigy rate the NB3-12 at 800 W RMS. Terminal cup is side mounted on the side opposite the port\n  mouth. A dual 2 ohm driver wired parallel presents 1 ohm, which many amplifiers are not\n  stable into; series at 4 ohm is the safe default unless yours is rated for it.\u003c\/p\u003e\n  \u003cp\u003ePerformance Optimized carries a 1-year warranty. Built to order in Tullahoma, Tennessee. The\n  driver is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"df-cta\"\u003e\n  \u003cp\u003eCut, folded and finished for the Prodigy NB3-12. The alignment, the port geometry and the power\n  figures all come from Prodigy's published parameters run through our own solver.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Proline X","offers":[{"title":"Black","offer_id":44822763012185,"sku":"PO 12-P W NB3 BB","price":399.99,"currency_code":"USD","in_stock":true},{"title":"None","offer_id":44822763110489,"sku":"PO 12-P W NB3 B","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/1389\/files\/PO_12-P_W_NB3_Front.jpg?v=1788444682","url":"https:\/\/audiointensity.com\/products\/performance-optimized-wedge-ported-12-enclosure-prodigy-nb3-12","provider":"Audio Intensity","version":"1.0","type":"link"}