{"product_id":"pioneer-ts-a25s4-10-component-subwoofer-deep-controlled-bass","title":"Pioneer TS-A25S4 10 Component Subwoofer - Deep, Controlled Bass","description":"\u003cp\u003eIn this review of the Pioneer TS-A25S4 10 component subwoofer the bottom line is straightforward: this is a compact, powerful passive sub designed for drivers who want deep, controlled bass without a bulky enclosure. It pairs especially well with Pioneer's A-series full-range speakers and is built to deliver punch and low-end detail thanks to a Glass-Fiber \u0026amp; Mica Reinforced IMPP cone and a 1200W peak \/ 350W nominal rating. For anyone upgrading a factory system who wants a tight, impactful low end in small spaces, this subwoofer is a strong, pragmatic choice.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-performance match:\u003c\/strong\u003e Designed to integrate with Pioneer's A-series full-range speakers to preserve tonal balance while adding impactful bass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower handling:\u003c\/strong\u003e 1200W max and 350W nominal power provide headroom for dynamic peaks and sustained bass without distortion when paired with an appropriate amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid cone:\u003c\/strong\u003e The Glass-Fiber \u0026amp; Mica Reinforced IMPP cone improves stiffness and strength for clearer, more detailed low-frequency reproduction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible wiring:\u003c\/strong\u003e The 4 single voice coil (SVC) design simplifies wiring and power distribution for straightforward installation and reliable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShallow mounting depth:\u003c\/strong\u003e A 5.625' mounting depth makes the subwoofer suitable for tight installations behind seats or in shallow enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended enclosure options:\u003c\/strong\u003e Engineered to perform in a 1.1 cu. ft. vented or 0.8 cu. ft. sealed enclosure to tune for punch or tighter bass response.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Pioneer TS-A25S4 suits drivers who want to upgrade factory or entry-level systems with a compact sub that still moves air and hits low notes. Installers and DIYers who value a shallow mount depth and standard single-coil wiring will appreciate how easily it fits under seats or behind rear cabins in many vehicles.\u003c\/p\u003e\n\u003cp\u003eThis is less appropriate for people seeking extreme SPL competition bass or a standalone powered cabinet; because it is a passive subwoofer it needs an external amplifier and a properly sized enclosure to reach its potential. Buyers needing very large displacement or dedicated ported cabinets for club-level output should look at larger, purpose-built subs.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePowerful, punchy low end with a 1200W peak capacity that handles dynamic music well.\u003c\/li\u003e\n\u003cli\u003eRigid IMPP cone yields detailed bass that holds up at higher output levels.\u003c\/li\u003e\n\u003cli\u003eShallow 5.625' mounting depth and compact size for versatile installation behind seats or in tight spaces.\u003c\/li\u003e\n\u003cli\u003eCompatible with external amplifiers for customizable tuning and gain control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAs a passive driver it requires a separate amplifier and correct enclosure to perform optimally, adding cost and setup work.\u003c\/li\u003e\n\u003cli\u003eNot designed for extreme SPL competition use; best for musical accuracy and compact installs rather than max output contests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriver size\u003c\/td\u003e\n\u003ctd\u003e10 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak power\u003c\/td\u003e\n\u003ctd\u003e1200W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal power\u003c\/td\u003e\n\u003ctd\u003e350W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCone material\u003c\/td\u003e\n\u003ctd\u003eGlass-Fiber \u0026amp; Mica Reinforced IMPP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice coil configuration\u003c\/td\u003e\n\u003ctd\u003e4 Single Voice Coil (SVC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting depth\u003c\/td\u003e\n\u003ctd\u003e5.625 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended enclosure\u003c\/td\u003e\n\u003ctd\u003e1.1 cu. ft. vented or 0.8 cu. ft. sealed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Pioneer TS-A25S4 is a practical, well-engineered passive subwoofer for anyone wanting deeper, controlled bass in a compact package. When driven by a suitable external amplifier and placed in the recommended enclosure it delivers strong value through durable materials, easy installation, and tight low-frequency performance that complements full-range A-series speakers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this sub fit behind a rear seat?\u003c\/strong\u003e\u003cbr\u003eYes - the shallow 5.625' mounting depth and compact 10 in size make it suitable for many behind-seat and tight-space installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need an amplifier?\u003c\/strong\u003e\u003cbr\u003eYes - the TS-A25S4 is a passive subwoofer and requires an external amplifier capable of delivering around 350W RMS for optimal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich enclosure should I use?\u003c\/strong\u003e\u003cbr\u003eFor punchier bass use the recommended 1.1 cu. ft. vented enclosure; for tighter, more controlled bass the 0.8 cu. ft. sealed enclosure is preferred.\u003c\/p\u003e","brand":"Pioneer","offers":[{"title":"Default Title","offer_id":46775035461851,"sku":"B07XDBPPWD","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71LELzjj9ZL._AC_SL1500.jpg?v=1747805291","url":"https:\/\/gearmusthave.com\/products\/pioneer-ts-a25s4-10-component-subwoofer-deep-controlled-bass","provider":"GearMustHave","version":"1.0","type":"link"}