{"product_id":"martinlogan-motion-foundation-b2-bookshelf-speaker","title":"MartinLogan Motion Foundation B2 Bookshelf Speaker","description":"\u003ch2 style=\"font-size:1.25em;margin:0 0 0.35em 0;\"\u003eWhat You Need to Know\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:1.1em;margin:1.2em 0 0.3em 0;\"\u003eDetail and Scale Unexpected in Its Class\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe Foundation B2 is the largest bookshelf speaker in MartinLogan's Motion Foundation Series—and the one that sounds least like a bookshelf speaker. Its 6.5-inch aluminum mid-bass driver reaches down to 42Hz, delivering a fullness and scale that make a stand or shelf-mounted system feel far bigger than it looks.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.1em;margin:1.2em 0 0.3em 0;\"\u003eMartinLogan's Signature Thin-Film Sound\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eAt the heart of the B2 is the Gen2 Obsidian Folded Motion Tweeter S, trickle-down technology from MartinLogan's famous electrostatic designs. Its folded thin-film diaphragm packs 3.5 square inches of surface area into a tiny space—fast, light, and low-excursion for stunning detail and clarity. The Folded Motion Waveguide controls dispersion, minimizing room reflections while blanketing a wide seating area with consistent, precise sound.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.1em;margin:1.2em 0 0.3em 0;\"\u003eA Finish for Every Room, Sold by Each\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eChoose Walnut with bronze trim, Gloss Black with gunmetal trim, or Satin White with silver trim. The B2 is sold individually—buy two for stereo, or mix with other Motion Foundation models for a matched surround system. Pairs perfectly with the MartinLogan STAND25 for a solid stand-mount setup.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;\"\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 0.45em 0;line-height:1.5;\"\u003e\u003cstrong\u003eGen2 Obsidian Folded Motion Tweeter S\u003c\/strong\u003e — Thin-film speed and detail derived from MartinLogan electrostatic technology.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.45em 0;line-height:1.5;\"\u003e\u003cstrong\u003eFolded Motion Waveguide\u003c\/strong\u003e — Controlled 90° x 90° dispersion for precise imaging across a wide seating area.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.45em 0;line-height:1.5;\"\u003e\u003cstrong\u003e6.5\" Aluminum Mid-Bass Driver\u003c\/strong\u003e — Unibody aluminum cone with non-resonant asymmetrical chamber; bass to 42Hz.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.45em 0;line-height:1.5;\"\u003e\u003cstrong\u003eEasy to Drive\u003c\/strong\u003e — 90dB sensitivity—sings with amplifiers from 15 to 100 watts.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.45em 0;line-height:1.5;\"\u003e\u003cstrong\u003eFlexible Placement\u003c\/strong\u003e — Rear-ported cabinet; shelf, stand (STAND25 compatible), or surround duty.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;\"\u003eSpecifications\u003c\/h2\u003e\n\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003eType: 2-Way Rear-Ported Bookshelf Speaker\u003c\/li\u003e\n\u003cli\u003eFrequency Response: 42Hz - 23kHz ± 3dB\u003c\/li\u003e\n\u003cli\u003eSensitivity: 90dB\u003c\/li\u003e\n\u003cli\u003eImpedance: 5 Ohms\u003c\/li\u003e\n\u003cli\u003eRecommended Amplifier Power: 15 - 100 Watts\u003c\/li\u003e\n\u003cli\u003eCrossover Frequency: 3,800Hz\u003c\/li\u003e\n\u003cli\u003eTweeter: 0.94\" x 1\" Gen2 Folded Motion Tweeter S (3.5 sq. in. diaphragm)\u003c\/li\u003e\n\u003cli\u003eMid-Bass Driver: 6.5\" Aluminum Cone, Stamped Steel Basket\u003c\/li\u003e\n\u003cli\u003eTweeter Dispersion: 90° x 90°\u003c\/li\u003e\n\u003cli\u003eInputs: 5-Way Binding Posts (Non Bi-Wire)\u003c\/li\u003e\n\u003cli\u003eDimensions: 15\"H x 7.75\"W x 11.5\"D\u003c\/li\u003e\n\u003cli\u003eWeight: 15 lbs\u003c\/li\u003e\n\u003cli\u003eFinish: Walnut, Gloss Black, or Satin White\u003c\/li\u003e\n\u003cli\u003eSold By: Each\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp style=\"margin:1.1em 0 0.15em 0;\"\u003e\u003cstrong\u003eIs this the price for one speaker or a pair?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.4em 0;line-height:1.55;\"\u003eThe Foundation B2 is sold by each. Order two for a stereo pair, or add singles as surround channels in a Motion Foundation home theater system.\u003c\/p\u003e\n\n\u003cp style=\"margin:1.1em 0 0.15em 0;\"\u003e\u003cstrong\u003eWhat amplifier do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.4em 0;line-height:1.55;\"\u003eWith 90dB sensitivity and a recommended range of just 15 to 100 watts, the B2 is easy to drive—most receivers and integrated amps will do nicely. Its 5-ohm impedance is compatible with virtually all modern amplifiers. Ask us if you're unsure about your electronics.\u003c\/p\u003e\n\n\u003cp style=\"margin:1.1em 0 0.15em 0;\"\u003e\u003cstrong\u003eWhat makes the Folded Motion tweeter different?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 0.4em 0;line-height:1.55;\"\u003eInstead of pushing air with a dome, it squeezes air between the folds of a pleated thin-film diaphragm—like an accordion. The result is far more surface area, faster response, and the airy, detailed high end MartinLogan is famous for, at a fraction of electrostatic prices.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;\"\u003eWhy Audio Advisor?\u003c\/h2\u003e\n\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e40+ Years of Expertise\u003c\/strong\u003e – Helping music lovers build better systems since 1981.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60-Day Money-Back Guarantee\u003c\/strong\u003e – Hear it in your own system with confidence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Product Experts\u003c\/strong\u003e – Friendly advice before and after your purchase.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping\u003c\/strong\u003e – On qualifying orders over $49.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Financing\u003c\/strong\u003e – Convenient payment options available.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Audio Advisor","offers":[{"title":"New \/ Walnut \/ New","offer_id":45981630234797,"sku":"NEW-MLMOFOB2-WAL","price":449.99,"currency_code":"USD","in_stock":true},{"title":"New \/ Walnut \/ Demo","offer_id":45981630267565,"sku":"DEMO-MLMOFOB2-WAL","price":449.99,"currency_code":"USD","in_stock":false},{"title":"New \/ Satin White \/ New","offer_id":45982098325677,"sku":"NEW-MLMOFOB2-SATWHT","price":449.99,"currency_code":"USD","in_stock":true},{"title":"New \/ Satin White \/ Demo","offer_id":45982098358445,"sku":"DEMO-MLMOFOB2-SATWHT","price":449.99,"currency_code":"USD","in_stock":false},{"title":"New \/ Black \/ New","offer_id":45983447253165,"sku":"NEW-MLMOFOB2-BLK","price":449.99,"currency_code":"USD","in_stock":true},{"title":"New \/ Black \/ Demo","offer_id":45983447285933,"sku":"DEMO-MLMOFOB2-BLK","price":449.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/3708\/1773\/files\/MLMOFOB2_WAL_01_2023__92813.1719930137.1280.1280_e83868c2-8004-4fb4-b8b2-04c5bbff0723.jpg?v=1778146418","url":"https:\/\/www.audioadvisor.com\/products\/martinlogan-motion-foundation-b2-bookshelf-speaker","provider":"Audio Advisor","version":"1.0","type":"link"}