{"product_id":"b-c-speakers-8-ps-21-422857","title":"8 PS 21","description":"\u003ch3\u003eAn 8-inch B\u0026C Focused on Bass-Midrange, Optimized for Compact Formats\u003c\/h3\u003e\u003cp\u003eThe B\u0026C 8PS21 falls into the \u003cstrong\u003ebass\/midrange\u003c\/strong\u003e category: it aims for a balance between impact, articulation, and control rather than emphasizing sub-bass. Its 8-inch size facilitates integration into compact enclosures while maintaining sufficient radiating surface to produce a present low-midrange. With a \u003cstrong\u003erecommended enclosure volume of 14 liters\u003c\/strong\u003e and a tuning frequency of \u003cstrong\u003e73 Hz\u003c\/strong\u003e, it naturally suits projects where reduced size is desired without sacrificing the consistency of the bass-midrange register.\u003c\/p\u003e\u003ch3\u003eWho Is It For and What Are Its Uses?\u003c\/h3\u003e\u003cp\u003eThis loudspeaker is primarily intended for \u003cstrong\u003espeaker designers\u003c\/strong\u003e (DIYers, workshops, manufacturers) and technicians seeking a reliable transducer to build or refurbish a speaker. Its frequency range (70 Hz to 3 kHz) makes it relevant as a \u003cstrong\u003ebass-midrange driver\u003c\/strong\u003e in a two-way speaker (paired with a compression driver or tweeter above), or as a low-mid element in more complex designs.\u003c\/p\u003e\u003cp\u003eThanks to its combination of efficiency and power handling, the 8PS21 is particularly suitable for \u003cstrong\u003ecompact stage monitors\u003c\/strong\u003e, small front-of-house speakers, reinforced nearfield monitors, or systems where \u003cstrong\u003eclarity of vocals and instruments\u003c\/strong\u003e in the lower spectrum (guitars, keyboards, snare and toms, lower vocals) is a priority. In such applications, a well-controlled 8-inch driver often delivers faster attack and cleaner low-midrange than a larger diameter driver housed in an enclosure that is too small.\u003c\/p\u003e\u003ch3\u003eDesign and Key Features in Use\u003c\/h3\u003e\u003ch4\u003e2-inch (51 mm) copper voice coil: durability and control\u003c\/h4\u003e\u003cp\u003eThe 8PS21 features a \u003cstrong\u003e2-inch (51 mm) copper voice coil\u003c\/strong\u003e. This size is a good compromise: large enough to handle high power while retaining the responsiveness expected from an 8-inch bass-midrange driver. Practically, this contributes to a sense of durability, with a low-midrange register that remains stable as volume increases.\u003c\/p\u003e\u003ch4\u003eFerrite magnet: stability and consistent behavior\u003c\/h4\u003e\u003cp\u003eThe \u003cstrong\u003eferrite magnet\u003c\/strong\u003e is a classic choice in sound reinforcement: it promotes consistent performance and a coherent sonic signature, with robust construction. It is a favored option for speakers designed to be used regularly, handled, and subjected to long-term use.\u003c\/p\u003e\u003ch4\u003eDouble-roll surround, exponential cone, single spider: mobility and response tailored to bass-midrange\u003c\/h4\u003e\u003cp\u003eThe \u003cstrong\u003edouble-roll surround\u003c\/strong\u003e contributes to good excursion capability and smooth operation, useful for supporting the low-frequency range. The \u003cstrong\u003eXmax of 5.0 mm\u003c\/strong\u003e aligns with this goal: providing mechanical margin that helps maintain control during dynamic passages. The \u003cstrong\u003eexponential cone\u003c\/strong\u003e is a relevant choice to shape the response and promote effective projection in the bass-midrange area. Finally, the \u003cstrong\u003esingle spider\u003c\/strong\u003e reflects a straightforward and proven architecture, well suited to this transducer's mission.\u003c\/p\u003e\u003ch4\u003eTuning and recommended volume: a clear starting point for enclosure design\u003c\/h4\u003e\u003cp\u003eThe \u003cstrong\u003erecommended enclosure volume\u003c\/strong\u003e is \u003cstrong\u003e14 liters\u003c\/strong\u003e with a \u003cstrong\u003etuning frequency of 73 Hz\u003c\/strong\u003e. This is valuable information to start designing a coherent bass-reflex enclosure and to limit unnecessary trial and error. Parameters such as \u003cstrong\u003eFs 73 Hz\u003c\/strong\u003e and \u003cstrong\u003eQts 0.33\u003c\/strong\u003e confirm this orientation: a compact enclosure with useful, clean, and efficient bass, and a natural transition to a high-frequency driver above.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:2rem\"\u003e\n\u003ctable style=\"flex:1 1 300px;width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eRackable\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003eNo\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003esound reinforcement accessory\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable style=\"flex:1 1 300px;width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003eSpeakers\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:2rem\"\u003e\n\u003cdiv style=\"flex:1 1 300px\"\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e400 W AES\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e8 Ohms\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eSensitivity\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e94 dB (1 W \/ 1 m)\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eFrequency response\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e70 Hz - 3 kHz\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eNominal diameter\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e8 inches (21 cm)\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eVoice coil\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e2 inches (51 mm), copper wire\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eMagnet\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003eferrite\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eSurround\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003edouble-roll\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eCone\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003eexponential\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eSpider\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003esingle\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 300px\"\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eFs\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e73 Hz\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eQts\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e0.33\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eXmax\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e5.0 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eTotal diameter\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e225 mm\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e91 mm\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e3.3 kg\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width:100%\"\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eVolume\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e14 liters\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd style=\"text-align:left\"\u003e\u003cstrong\u003eTuning\u003c\/strong\u003e\u003c\/td\u003e\u003ctd style=\"text-align:left\"\u003e73 Hz\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"B\u0026C Speakers","offers":[{"title":"Default Title","offer_id":54356783628563,"sku":"422857","price":105.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0872\/6803\/files\/f2cf53291124276ecd279b709b424d03cede354b_MSC_8865_52acf82c-b11a-4f15-be5f-0a5f80b8617b.jpg?v=1787302433","url":"https:\/\/woodbrass.shop\/products\/b-c-speakers-8-ps-21-422857","provider":"Woodbrass.com","version":"1.0","type":"link"}