{"product_id":"factory-connection-harness-to-add-a-new-subwoofer-amplifier-while-retaining-factory-b-o-including-unleashed-read-description-below","title":"Ford B\u0026O Subwoofer Harness - Fixes Factory Bass Roll-Off (2018-2026)","description":"\u003cp\u003e\u003cstrong\u003eThe only pre-tuned, plug-and-play subwoofer harness that fixes the factory bass roll-off on Ford B\u0026amp;O and B\u0026amp;O Unleashed systems.\u003c\/strong\u003e Add a real aftermarket subwoofer to your Ford and finally hear full bass at every volume level — hand-built and tuned in Nashville for your exact truck.\u003c\/p\u003e\n\u003ch3\u003eThe problem, in one line\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAround volume level 14 (varies by trim), Ford's B\u0026amp;O DSP starts turning your bass \u003cem\u003edown\u003c\/em\u003e.\u003c\/li\u003e\n\u003cli\u003eAbove volume 14, the DSP \u003cstrong\u003ehalves the voltage\u003c\/strong\u003e on the subwoofer channel depending on how much bass is in the song — your sub output becomes unpredictable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo external DSP, Zen, LC2, or generic LOC will fix this.\u003c\/strong\u003e The voltage halving happens inside the factory B\u0026amp;O amp before any of those components see the signal.\u003c\/li\u003e\n\u003cli\u003eWithout the right harness, you end up chasing the subwoofer knob all drive. Reviewers call the result \"muddy yet tinny.\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy our method works\u003c\/h3\u003e\n\u003cp\u003eWe tested every integration option on the market. None held up, so we built our own. Instead of tapping the factory subwoofer output (where the roll-off happens), our harness taps \u003cstrong\u003etwo specific interior speakers\u003c\/strong\u003e whose signals stay clean at any volume, and routes them through a pre-programmed \u003cstrong\u003eKicker KeyLOC\u003c\/strong\u003e module.\u003c\/p\u003e\n\u003cp\u003eHere's why that combination matters:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThose interior speakers carry just enough low-frequency information to reconstruct a full subwoofer signal.\u003c\/li\u003e\n\u003cli\u003eB\u0026amp;O applies \u003cstrong\u003eall-pass filters\u003c\/strong\u003e to interior speakers that introduce frequency-dependent phase shifts. A standard LOC sums left and right naively — which causes cancellation in the bass region where you need it most.\u003c\/li\u003e\n\u003cli\u003eThe Kicker KeyLOC's signal processing corrects those phase shifts and combines the left and right channels (tuned differently on B\u0026amp;O) into a clean, phase-coherent subwoofer signal. Kicker's KeyLOC technology is patented; our vehicle-specific tunes are proprietary to Sounds Good Stereo.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery \u003cstrong\u003eFix Roll-Off\u003c\/strong\u003e variant ships \u003cstrong\u003epre-programmed at our Nashville facility\u003c\/strong\u003e for your exact year, model, and factory system. Connect 12V power, ground, and remote turn-on, land the included RCAs on your amplifier, and you're done. No head-unit work. No wire cutting. No tuning guesswork.\u003c\/p\u003e\n\u003ch3\u003eWhat you're buying\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFix Factory Bass Roll-Off variants ($290)\u003c\/strong\u003e — Custom SGS harness + pre-tuned Kicker KeyLOC module ($130 MSRP retail) + vehicle-specific tune + lifetime retune if you swap Fords. \u003cstrong\u003eThe professional answer.\u003c\/strong\u003e This is what we put in every Nashville build that uses an aftermarket subwoofer amp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep Factory Bass Roll-Off variants ($41–$61)\u003c\/strong\u003e — Just the plug-and-play passthrough harness. Bass plays as the factory system sends it: \u003cstrong\u003estable from volume 0–14, unpredictable above 14\u003c\/strong\u003e as the factory DSP halves the subwoofer voltage depending on how much bass is in the song. No external DSP, Zen, LC2, or generic LOC will change that. Choose this variant if you specifically want the passthrough and accept the above-14 behavior.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to pick your variant\u003c\/h3\u003e\n\u003cp\u003eThe 3-step guided selector at the top of this page will walk you through it. Quick summary:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentify your factory subwoofer shape.\u003c\/strong\u003e Remove the rear seat bottom (two 10mm bolts). \u003cstrong\u003eOval\u003c\/strong\u003e = 2021+ F-150, 2021+ F-150 Unleashed, 2023+ Super Duty. \u003cstrong\u003eRound\u003c\/strong\u003e = 2015-2020 F-150, 2020 Super Duty, Ranger. If you can't tell, text a photo to \u003cstrong\u003e615.610.1413\u003c\/strong\u003e — we'll confirm in 60 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecide on the roll-off fix.\u003c\/strong\u003e For nearly every build adding an aftermarket subwoofer amp, Fix Factory Bass Roll-Off is the right call.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch output to your amp.\u003c\/strong\u003e Fix variants ship with a LOC and are always \u003cstrong\u003eLow Level (RCA)\u003c\/strong\u003e. Keep variants give you the factory signal as-is — pick \u003cstrong\u003eHigh Level (RCA)\u003c\/strong\u003e for amps with built-in high-level \/ LOC inputs (JL Audio, Kicker, Arc, Mosconi, newer Alpine, newer Rockford), or \u003cstrong\u003eHigh Level (Speaker Wire)\u003c\/strong\u003e for amps that require an external LC2i or similar LOC (older Alpine, AudioControl, older Rockford). You'll use our speaker-wire output into that external LOC.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eNot 100% sure? Call or text 615.610.1413 before ordering.\u003c\/strong\u003e We'd rather spend five minutes on the phone than have you reinstall. This is by far the most-asked-about product on our site — every experienced tech on our team has it memorized.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eHere is a video on how to install the Fix Factory Roll-Off Solution\u003c\/strong\u003e\u003cbr\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/gGOsmNz2v-A?si=-FOVeIY5j9nQzbx3\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Ten87 Design","offers":[{"title":"Oval Subwoofer (B\u0026O Unleashed) \/ Fix Factory Bass Roll-Off \/ Low Level (RCA)","offer_id":59851831050526,"sku":"BO-PP-2021PlusFseriesULRCA-Key","price":290.0,"currency_code":"USD","in_stock":true},{"title":"Oval Subwoofer (B\u0026O Unleashed) \/ Keep Factory Bass Roll-Off \/ High Level (RCA)","offer_id":59851831083294,"sku":"BO-PP-2021PlusFseriesULRCA","price":54.0,"currency_code":"USD","in_stock":true},{"title":"Oval Subwoofer (B\u0026O Unleashed) \/ Keep Factory Bass Roll-Off \/ High Level (Speaker Wire)","offer_id":59851831116062,"sku":"BO-PP-2021PlusFseries-ULSW","price":41.0,"currency_code":"USD","in_stock":true},{"title":"Oval Subwoofer (B\u0026O) \/ Fix Factory Bass Roll-Off \/ Low Level (RCA)","offer_id":59851831148830,"sku":"BO-PP-2021PlusFseries-Key","price":290.0,"currency_code":"USD","in_stock":true},{"title":"Oval Subwoofer (B\u0026O) \/ Keep Factory Bass Roll-Off \/ High Level (RCA)","offer_id":59851831181598,"sku":"BO-PP-2021PlusFseriesRCA","price":54.0,"currency_code":"USD","in_stock":true},{"title":"Oval Subwoofer (B\u0026O) \/ Keep Factory Bass Roll-Off \/ High Level (Speaker Wire)","offer_id":59851831214366,"sku":"BO-PP-2021PlusFseries-SW","price":50.0,"currency_code":"USD","in_stock":true},{"title":"Round Subwoofer (B\u0026O) \/ Fix Factory Bass Roll-Off \/ Low Level (RCA)","offer_id":59851831247134,"sku":"BO-PP-Fseries-Key","price":290.0,"currency_code":"USD","in_stock":true},{"title":"Round Subwoofer (B\u0026O) \/ Keep Factory Bass Roll-Off \/ High Level (RCA)","offer_id":59851831279902,"sku":"BO-PP-Fseries","price":51.0,"currency_code":"USD","in_stock":true},{"title":"Round Subwoofer (B\u0026O) \/ Keep Factory Bass Roll-Off \/ High Level (Speaker Wire)","offer_id":59851831312670,"sku":"BO-PP-Fseries-SW","price":61.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7171\/1262\/files\/3235a3bd-3631-424c-9894-87bf2f763d3e.jpg?v=1787791989","url":"https:\/\/platinumhpsolutions.com\/products\/factory-connection-harness-to-add-a-new-subwoofer-amplifier-while-retaining-factory-b-o-including-unleashed-read-description-below","provider":"Platinum High Performance Solutions, LLC.","version":"1.0","type":"link"}