{"title":"Bandpass Enclosures","description":"\u003ch2\u003eAlumapro BP-Series Bandpass Enclosures\u003c\/h2\u003e\n\n\u003cp\u003eMaximum acoustic output in minimum space — hand-built in Huntley, Illinois. Alumapro's BP-Series bandpass enclosures use a precision-tuned dual chamber design that's more efficient than conventional sealed or vented enclosures. They're louder with less amplifier power, with frequency response tailored specifically for the car environment — extending bass below 30Hz.\u003c\/p\u003e\n\n\u003cp\u003eEach BP enclosure comes loaded with an Alumapro aluminum alloy cone woofer, wrapped in premium black carpet with carbon-pattern plexi viewing windows, heavy-duty bolted construction, and large flared aero-ports for zero compression at high output. Available in 8\", 10\", and 12\" — from compact daily drivers to competition-level thunder.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineered and assembled in the USA by Alumapro. Free shipping on orders over $499.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"bp-8","title":"BP-08 | Alumapro 8 inch 250 watt Band Pass Enclosure","description":"\u003ch2\u003eMaximum Bass in Minimum Space — Hand-Built in Huntley, IL\u003c\/h2\u003e\n\n\u003cp\u003eThe BP-8 proves you don't need a massive box to get massive bass. Alumapro's BP-Series bandpass enclosures are engineered to produce maximum acoustic output in the smallest possible space. The dual chamber design is more efficient than conventional sealed or vented enclosures — meaning it's louder with less amplifier power. If you're tight on space but refuse to compromise on bass, the BP-8 is built for you.\u003c\/p\u003e\n\n\u003ch3\u003eDual Chamber Bandpass Design\u003c\/h3\u003e\n\n\u003cp\u003eInside the BP-8 is a precisely tuned dual chamber system that does what sealed and ported boxes can't — it uses both the front and rear energy of the woofer to produce sound. The result is significantly higher efficiency and output from a compact package. The frequency response is specifically tailored to complement the acoustics of a car interior, extending bass below 30Hz with authority.\u003c\/p\u003e\n\n\u003ch3\u003eAlumapro Aluminum Alloy Cone Woofer\u003c\/h3\u003e\n\n\u003cp\u003eAt the heart of the BP-8 is a purpose-built 8\" Alumapro woofer featuring the signature aluminum alloy cone — immune to temperature and humidity extremes that destroy paper and poly cones. The massive motor structure, rigid frame, Kevlar spider, and Santoprene surround deliver consistent, reliable performance year after year.\u003c\/p\u003e\n\n\u003ch3\u003eAero-Port Technology\u003c\/h3\u003e\n\n\u003cp\u003eLarge flared aero-ports eliminate compression and port noise that plague lesser enclosures. At high output levels where cheap boxes start choking and making wind noise, the BP-8 stays clean and composed. More air moves freely, more bass reaches your ears.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt to Last, Built to Impress\u003c\/h3\u003e\n\n\u003cp\u003eThe BP-8 is wrapped in premium durable black carpet with heavy-duty bolted and clamped construction. A thick gasketed plexi viewing window with carbon-pattern accents lets you show off the Alumapro woofer inside. This isn't just a subwoofer enclosure — it's a showpiece.\u003c\/p\u003e\n\n\u003ch3\u003eSpecs at a Glance\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eEnclosure: Bandpass with 1x8\" Alumapro woofer\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 30–100 Hz\u003c\/li\u003e\n\u003cli\u003eImpedance: 4 ohms\u003c\/li\u003e\n\u003cli\u003eSensitivity: 92dB \/ 2.83v \/ 1m\u003c\/li\u003e\n\u003cli\u003eDimensions: 10\"W x 13.5\"H x 15\"D\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineered and assembled in the USA by Alumapro.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Alumapro","offers":[{"title":"Default Title","offer_id":52357267063073,"sku":"108BBC-0402-_ _","price":380.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/1145\/9873\/files\/PXL_20250522_230137912.RAW-01.MP.COVER_063426f3-899f-47b2-96fa-d9f077432667.png?v=1771967675"},{"product_id":"bp-10","title":"BP-10 | Alumapro 10 inch 400 watt Band Pass Enclosure","description":"\u003ch2\u003eMaximum Bass in Minimum Space — Hand-Built in Huntley, IL\u003c\/h2\u003e\n\n\u003cp\u003eThe BP-10 is the sweet spot of the BP-Series — a 10\" bandpass enclosure that delivers deep, powerful bass without taking over your entire trunk. Alumapro's dual chamber bandpass design is more efficient than conventional sealed or vented enclosures, so it hits harder with less amplifier power. Frequency response reaches down to 20Hz, putting out the kind of low-end that you don't just hear — you feel.\u003c\/p\u003e\n\n\u003ch3\u003eDual Chamber Bandpass Design\u003c\/h3\u003e\n\n\u003cp\u003eThe BP-10's precisely tuned dual chamber system harnesses both the front and rear energy of the woofer simultaneously. The result is significantly higher efficiency and SPL from a mid-size package that outperforms subwoofers rated at much higher power. The frequency response is specifically shaped to complement car cabin acoustics, delivering tight, musical bass that extends well below 30Hz.\u003c\/p\u003e\n\n\u003ch3\u003eAlumapro Aluminum Alloy Cone Woofer\u003c\/h3\u003e\n\n\u003cp\u003eInside the BP-10 is a dedicated 10\" Alumapro woofer featuring the signature aluminum alloy cone — immune to temperature and humidity extremes that destroy paper and poly cones. The massive motor structure, rigid frame, Kevlar spider, and Santoprene surround are built for sustained high-output performance without compromise.\u003c\/p\u003e\n\n\u003ch3\u003eAero-Port Technology\u003c\/h3\u003e\n\n\u003cp\u003eLarge flared aero-ports eliminate compression and port noise that plague lesser enclosures. At high output levels where cheap boxes start choking and making wind noise, the BP-10 stays clean and composed. More air moves freely, more bass reaches your ears.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt to Last, Built to Impress\u003c\/h3\u003e\n\n\u003cp\u003ePremium durable black carpet, heavy-duty bolted and clamped construction, and a thick gasketed plexi viewing window with carbon-pattern accents. The BP-10 looks as serious as it sounds. Show it off — it deserves to be seen.\u003c\/p\u003e\n\n\u003ch3\u003eSpecs at a Glance\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eEnclosure: Bandpass with 1x10\" Alumapro woofer\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 20–80 Hz\u003c\/li\u003e\n\u003cli\u003eImpedance: 4 or 8 ohms\u003c\/li\u003e\n\u003cli\u003eSensitivity: 96dB \/ 2.83v \/ 1m\u003c\/li\u003e\n\u003cli\u003eDimensions: 12\"W x 15\"H x 16.5\"D\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineered and assembled in the USA by Alumapro.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Alumapro","offers":[{"title":"Default Title","offer_id":52357267095841,"sku":"110BBC-0402-_ _","price":439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/1145\/9873\/files\/PXL_20250522_230137912.RAW-01.MP.COVER_89ef6581-a50c-484c-83cf-f3b8cbe2ef20.png?v=1771967649"},{"product_id":"bp-12","title":"BP-12 | Alumapro 12 inch 400 watt Band Pass Enclosure","description":"\u003ch2\u003eMaximum Bass in Minimum Space — Hand-Built in Huntley, IL\u003c\/h2\u003e\n\n\u003cp\u003eThe BP-12 is the flagship of the BP-Series — a 12\" bandpass enclosure that delivers chest-thumping, competition-level bass from a design that outperforms subwoofers rated at much higher power. Alumapro's dual chamber bandpass design reaches down to 20Hz with 97dB sensitivity, meaning this box gets loud — seriously loud — without demanding a massive amplifier. For enthusiasts who want maximum impact, the BP-12 is the real deal.\u003c\/p\u003e\n\n\u003ch3\u003eDual Chamber Bandpass Design\u003c\/h3\u003e\n\n\u003cp\u003eThe BP-12's precisely tuned dual chamber system harnesses both the front and rear energy of the 12\" woofer simultaneously. This is the most efficient enclosure design in car audio — delivering higher SPL per watt than sealed, ported, or free-air setups. The frequency response is specifically shaped to complement car cabin acoustics, with deep, authoritative bass that extends to 20Hz and beyond.\u003c\/p\u003e\n\n\u003ch3\u003eAlumapro Aluminum Alloy Cone Woofer\u003c\/h3\u003e\n\n\u003cp\u003eInside the BP-12 is a full-size 12\" Alumapro woofer featuring the signature aluminum alloy cone — immune to temperature and humidity extremes that destroy paper and poly cones. The massive motor structure, rigid frame, Kevlar spider, and Santoprene surround handle sustained high-output punishment without breaking a sweat.\u003c\/p\u003e\n\n\u003ch3\u003eAero-Port Technology\u003c\/h3\u003e\n\n\u003cp\u003eLarge flared aero-ports eliminate compression and port noise that plague lesser enclosures. At competition-level output where cheap boxes fall apart, the BP-12 stays clean, tight, and composed. Zero port noise. Zero compression. Just bass.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt to Last, Built to Impress\u003c\/h3\u003e\n\n\u003cp\u003ePremium durable black carpet, heavy-duty bolted and clamped construction, and a thick gasketed plexi viewing window with carbon-pattern accents. The BP-12 isn't just an enclosure — it's a statement. Show it off at the meet. It can take it.\u003c\/p\u003e\n\n\u003ch3\u003eSpecs at a Glance\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eEnclosure: Bandpass with 1x12\" Alumapro woofer\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 20–80 Hz\u003c\/li\u003e\n\u003cli\u003eImpedance: 4 or 8 ohms\u003c\/li\u003e\n\u003cli\u003eSensitivity: 97dB \/ 2.83v \/ 1m\u003c\/li\u003e\n\u003cli\u003eDimensions: 15.5\"W x 16\"H x 19.5\"D\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineered and assembled in the USA by Alumapro.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Alumapro","offers":[{"title":"Default Title","offer_id":52357267128609,"sku":"112BBC-0402-_ _","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/1145\/9873\/files\/PXL_20260310_192705818.RAW-01.MP.COVER.png?v=1773199589"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/1145\/9873\/collections\/PXL_20250522_230137912.RAW-01.MP.COVER.png?v=1771967579","url":"https:\/\/www.shopalumapro.com\/collections\/enclosures-bandpass.oembed","provider":"ShopAlumapro.com","version":"1.0","type":"link"}