Motion Foundation B1 vs Motion Foundation B2
The Motion Foundation B2's sensitivity is 90 dB against the Motion Foundation B1's 89 dB. Both share impedance (5Ω), high-frequency extension (23 kHz), and ways (2).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersBookshelf Speakers
Estimated price (community-sourced)
$237 - $280
Around — community and catalog average, updates slowly
About the Motion Foundation B1
The MartinLogan Motion Foundation B1 is a compact bookshelf speaker that delivers high-performance sound in a versatile size. It features MartinLogan's renowned thin-film tweeter technology paired with a custom Folded Motion Waveguide for consistent, detailed sound across the listening area. The speaker combines a Gen2 Obsidian Folded Motion Tweeter S with a 5.5" aluminum midbass driver to create an engaging listening experience from a compact footprint. The B1 is particularly well-suited for small spaces and works exceptionally well when paired with a subwoofer for enhanced bass response. It is threaded to work with MartinLogan's STAND25 for a stable stand-mount solution. The Foundation series redefines affordable hi-fi by incorporating many of MartinLogan's signature high-performance technologies at accessible prices, leveraging 40 years of design and engineering expertise.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 89 dB SPL @ 1W/1m
- Impedance
- 5Ω
- Frequency Response
- 48 Hz - 23 kHz
- Power Handling
- 100W
- Min. Amplifier Power
- 15W
- Max. Amplifier Power
- 100W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 2-way
- Driver Type
- dynamic
- Driver Size
- 5.5"
- Driver Count
- 2
- Enclosure Type
- ported
- Crossover Frequency
- 3.4 kHz
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 184 × 346 × 240.5 mm (W × H × D)
- Weight
- 5.2 kg (11 lbs)
- Available Colors
- Black with Gunmetal trim, Satin White with Silver trim, Walnut with Bronze trim
Key Specifications
Sensitivity: 89 dB
Impedance: 5Ω
Frequency: 48-23000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions