MartinLogan Motion Foundation B1
Description of the product.
| Brand | MartinLogan |
| Model | Motion Foundation B1 |
| Drivers | |
| Woofer | |
| Woofer diameter (mm) | |
| Midrange | 5.5” (14cm) aluminum cone with stamped steel basket. Non-resonant asymmetrical chamber format. Unibody cone construction. |
| Midrange diameter (mm) | 140 |
| Tweeter | 0.94” x 1” (2.4 x 2.5cm) Gen2 Folded Motion® Tweeter S with 3.5 in2 (22.6 cm2) diaphragm. |
| Tweeter diameter (mm) | 24 |
| Frequency response | 48 Hz – 23000 Hz +3 −3 dB |
| Enclosure | Ported |
| Sensitivity (dB) | 89 |
| Impedance (Ω) | 5 |
| Recommended amplifier power, least (W) | 15 |
| Recommended amplifier power, most (W) | 100 |
| Built-in amplifier power (W) | |
| Height (mm) | 348 |
| Width (mm) | 184 |
| Depth (mm) | 241 |
| Weight (kg) | 5.2 |