Martin Logan Motion B10
2-way bookshelf speaker from Martin Logan, fitted with a Folded Motion Gen2 ribbon tweeter and a woven fibreglass midrange, for compact and detailed listening.
Description
The Motion B10 is a 2-way bookshelf speaker from Martin Logan, designed in a bass-reflex configuration to complement a stereo system or a home cinema setup in a limited space. Its compact format allows it to sit on a piece of furniture or a dedicated stand without taking up excessive room.
The speaker pairs a 2.6 cm × 3.6 cm Folded Motion Gen2 Obsidian tweeter with a 14 cm woven fibreglass midrange driver. This ribbon tweeter is built on a motor structure revised from the previous generation, which improves efficiency and reduces distortion. The waveguide profile has been designed to match the dispersion of the midrange driver, with a stated coverage of 90° both vertically and horizontally: this promotes consistent sound quality across a wider listening area, without the exact position of the listener being too critical. The crossover frequency between the two drivers sits at 2370 Hz, and the frequency response is given as 56 Hz to 25 kHz at ± 3 dB. With a sensitivity of 92 dB and an impedance of 5 ohms, the Motion B10 accepts a recommended amplifier power of between 20 and 200 watts, making it compatible with both moderately powered amplifiers and more powerful setups.
This model is aimed at anyone looking for a compact bookshelf speaker for a medium-sized room, whether in stereo or as part of a home cinema system, without wanting to sacrifice midrange definition or treble refinement. Its dimensions (31.8 cm × 17.8 cm × 24.8 cm) and weight of 6.6 kg make it suited to stand or shelf placement rather than use in a large room.
Technical specifications
| Frequency response | 56 Hz - 25 kHz ± 3 dB |
| Dispersion | 90° (vertical) × 90° (horizontal) |
| Sensitivity | 92 dB |
| Impedance | 5 ohms |
| Crossover frequency | 2370 Hz (2-way) |
| Recommended amplifier power | 20 - 200 watts |
| Configuration | bass-reflex |
| High frequency tweeter | Folded Motion Gen2 Obsidian, 2.6 cm × 3.6 cm |
| Mid frequency driver | 14 cm woven fibreglass cone |
| Dimensions (H × W × D) | 31.8 cm × 17.8 cm × 24.8 cm |
| Weight | 6.6 kg |
What to check before buying used
The suspension of the woven fibreglass midrange driver deserves close inspection: it can stiffen or crack over time, which affects low-frequency performance. Also check the condition of the Folded Motion Gen2 ribbon, which is sensitive to impacts and humidity, as well as the cabinet and the bass-reflex port at the rear of the enclosure for any looseness or cracks. Testing both drivers at moderate volume helps detect any hum or distortion that would indicate a worn component.
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