MartinLogan Motion Foundation B1

Product highlights:

• 1" x 0.94" Gen2 Obsidian Folded Motion® tweeter with custom waveguide
• 5-1/2" aluminum cone midrange/bass woofer with cast aluminum basket
• bass-reflex (ported) cabinet
• frequency response: 48-23,000 Hz (±3dB)
• McCracken-Vojtko crossover network
• sensitivity: 89 dB
• nominal impedance: 5 ohms
• recommended amplifier power: 15-100 watts
• removable grille
• five-way binding post speaker terminals

Dimensions and warranty:

• 7-1/4"W x 13-5/8"H x 9-1/2"D
• weight: 11.5 lbs.
• warranty: 5 years (with product registration)
• 60-day returns
• MFR # FB1SW