MartinLogan Motion Foundation B1 Bookshelf Speakers (Satin White, Pair)

MartinLogan Motion Foundation B1 Bookshelf Speakers (Satin White, Pair) Compact in size, captivating in sound — the MartinLogan Motion Foundation B1 is the entry point into MartinLogan's celebrated Motion Foundation series, and it makes no compromises where it counts. At its heart sits MartinLogan's iconic Folded Motion® tweeter, a technology derived from their flagship electrostatic designs, delivering the kind of airy, precise high-frequency detail that transforms a good recording into a great listening experience. Paired with a purpose-built 4" aluminium cone woofer and a rear-ported bass-reflex cabinet, the B1 punches well above its weight class — whether mounted on stands in a dedicated stereo setup, used as surround speakers in a home theatre, or tucked neatly onto a bookshelf. The Satin White finish keeps things clean and contemporary. Sold as a matched pair. Key Features Folded Motion® Tweeter — ultra-low mass diaphragm for fast transient response and exceptional clarity in the high frequencies 4" Aluminium Cone Woofer — rigid, lightweight cone for accurate and dynamic midrange and bass reproduction Bass-Reflex Enclosure — rear-ported cabinet design extends low-frequency output and improves efficiency Wide Frequency Response — 80 Hz to 20 kHz (±3 dB) for full musical reproduction from a compact cabinet 4 Ohm Nominal Impedance — compatible with a wide range of stereo amplifiers and AV receivers Magnetically Attachable Grille — tool-free grille removal for a refined, uncluttered aesthetic 5-Way Gold-Plated Binding Posts — accepts bare wire, banana plugs, and spade connectors Satin White Cabinet — sleek finish that integrates beautifully into modern living spaces Specifications Specification Value Tweeter Folded Motion® (0.9" × 1.4" radiating area) Woofer 4" Aluminium Cone with Non-resonance Basket Frequency Response 80 – 20,000 Hz (±3 dB) Sensitivity 90 dB / 2.83V / m Nominal Impedance 4 Ohms Recommended Amplifier Power 20 – 100 Watts per channel Crossover Frequency 3,200 Hz Crossover Topology 2nd-order electro-acoustic Enclosure Type Bass-Reflex (Rear-Ported) Dimensions (H × W × D) 245 × 148 × 200 mm (9.6" × 5.8" × 7.9") Weight (each) 4.3 kg (9.5 lbs) Finish Satin White Grille Magnetically Attachable, Black Cloth Binding Posts 5-Way Gold-Plated Sold As Pair MPN MLFB1W Google Product Category Electronics > Audio > Speakers (ID: 249)