Small in size but not sound, the most compact Motion Foundation model offers unheard of performance from such a versatile size.

The Gen2 Obsidian Folded Motion Tweeter S, Folded Motion Waveguide, and 5.5” aluminum midbass driver work together here to create a completely unexpected and engaging experience from a compact footprint. Foundation B1 is ideal for small spaces, especially when combined with a subwoofer, to create a highly musical, detailed experience wherever high quality sound is desired. Foundation B1 is also threaded to work with our STAND25 to create a stable stand mount solution.
Specifications:
Frequency Response: 48 Hz - 23 kHz ± 3 dB
Tweeter Dispersion (horizontal x vertical): 90° x 90°
Recommended Amplifier Power: 15 - 100 watts
Sensitivity: 89 dB
Impedance: 5 ohms
High Frequency Driver: 0.94” x 1” (2.4 x 2.5cm) Gen2 Folded Motion® Tweeter S with 3.5 in2 (22.6 cm2) diaphragm.
Crossover Frequency: 3,400 Hz (2-way)
Mid-Frequency Drivers: 5.5” (14cm) aluminum cone with cast aluminum basket. Non-resonant sealed chamber format. Unibody cone construction.
Cabinet: Rear Ported
Binding Post Inputs: 5-way Binding Posts (Non Bi-Wire)
Weight: 11.5 lbs / 5.2 kg
Dimensions (H x W x D): 13-11/16” x 7-1/4” x 9-1/2” (34.6cm x 18.4cm x 24.05cm)