{"product_id":"tweeter-audio-booster-kit-gr86-brz-toyota-86","title":"Sequential Sound+ Tweeter Audio Booster Kit – GTS 86 \/ GR86 \/ BRZ - Japan Made","description":"\u003cp\u003eCustom made from Japanese-Made Audio Enhancement Upgrade \u003cmeta charset=\"utf-8\"\u003ePlug \u0026amp; Play\u003c\/p\u003e\n\u003cp\u003eTransform the factory sound system in your Toyota 86, GR86, or Subaru BRZ with the Sequential Sound+ Tweeter Audio Booster Kit — a unique Japanese-made plug-and-play audio upgrade engineered to dramatically improve clarity, vocal presence, and overall listening experience without replacing speakers or requiring complicated audio modifications.\u003c\/p\u003e\n\u003cp\u003eDeveloped and manufactured in Japan by the audio enthusiasts at ChikiParts, this custom-engineered solution combines specialist crossover tuning with OEM-style integration to unlock hidden sound quality from the factory audio system while maintaining complete reversibility and factory-like installation.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for 6-speaker vehicles, the system installs inline between the factory vehicle wiring and tweeter speakers using specially engineered crossover circuitry that restores audio frequencies commonly filtered out by the OEM system. The result is noticeably clearer vocals, improved staging, enhanced detail, and a richer overall sound profile for music, podcasts, and everyday driving.\u003c\/p\u003e\n\u003cp\u003eNo coding, tuning, or permanent modification required.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for Toyota 86 \/ GR86 \/ Subaru BRZ (6-speaker systems)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eJapanese-made custom audio enhancement solution\u003c\/li\u003e\n\u003cli\u003eDeveloped in collaboration with ChikiParts Japan\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlug-and-play installation with OEM-style connectors\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo coding or programming required\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFully reversible installation\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnhances clarity, vocals, and sound staging\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRestores frequencies filtered by factory audio wiring\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProfessionally tuned crossover design\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo additional power source required\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompatible with OEM and many aftermarket speaker setups\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInstalls in approximately 10–20 minutes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThe Sequential Sound+ Booster Kit uses a specially engineered crossover integrated into the cable harness to restore audio frequencies typically filtered out by the factory wiring system.\u003c\/p\u003e\n\u003cp\u003eBy unlocking frequencies in the critical 3000Hz–7000Hz vocal range, the system produces:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCleaner and clearer vocals\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eImproved audio separation and balance\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMore detailed music playback\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnhanced stereo imaging and sound stage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe difference is immediately noticeable without replacing your factory head unit or speakers.\u003c\/p\u003e\n\u003ch3\u003eSound Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSharper vocal clarity\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMore balanced and centered audio presentation\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eImproved detail in music and podcasts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnhanced spatial sound perception inside the cabin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePlug \u0026amp; Play Installation\u003c\/h3\u003e\n\u003cp\u003eSimple OEM-style installation designed for enthusiasts of all experience levels.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove factory tweeter grille using included trim tool\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDisconnect factory tweeter harness\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eConnect Sequential Sound+ inline harness\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eReinstall grille and enjoy improved sound\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNo cutting\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eNo coding\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eNo permanent modifications\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eCompatible with factory 6-speaker audio systems only\u003c\/p\u003e\n\u003cp\u003eWorks with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eToyota 86\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eToyota GR86\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSubaru BRZ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCompatible with factory and many aftermarket speakers retaining OEM wiring\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAdditional vehicle-specific Sound+ solutions may also be available for selected Mazda platforms including Mazda 2, Mazda 3, and Mazda CX-5 models. Please contact us to confirm compatibility for your vehicle.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2 × Sequential Sound+ Booster Harnesses (Left \u0026amp; Right)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTrim Removal Tool\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInstallation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCompatible only with factory-supported speaker wiring layouts\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWhy Choose Sequential Racing?\u003c\/h3\u003e\n\u003cp\u003eSequential Racing focuses on enthusiast-driven upgrades that deliver real-world improvements without unnecessary complexity. The Sequential Sound+ Tweeter Audio Booster Kit offers one of the easiest and most effective OEM+ audio enhancements available for the 86\/GR86\/BRZ platform.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJapanese-made precision audio tuning\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFactory-safe and fully reversible\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eProfessional audio enhancement without expensive upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your Toyota 86, GR86, or BRZ audio system with the Sequential Sound+ Tweeter Audio Booster Kit and experience clearer, richer sound in minutes.\u003c\/p\u003e","brand":"Sequential Racing","offers":[{"title":"GR86 \/ 86 \/ BRZ","offer_id":53453312164154,"sku":null,"price":110.0,"currency_code":"AUD","in_stock":true},{"title":"Mazda 2 \/ Mazda 3 (2014-2025)","offer_id":53453312196922,"sku":null,"price":110.0,"currency_code":"AUD","in_stock":true},{"title":"Mazda CX-5 2012-2025","offer_id":53453312229690,"sku":null,"price":110.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0876\/0570\/7066\/files\/DB28659F-7F43-4B9F-ADF0-8E9EA89DCA95.jpg?v=1778729019","url":"https:\/\/sequentialracing.com.au\/products\/tweeter-audio-booster-kit-gr86-brz-toyota-86","provider":"Sequential Racing","version":"1.0","type":"link"}