MartinLogan Motion 20 Specification
| System type | 2-way |
| Enclosure type | Bass-reflex |
| Frequency response ± 3dB | 46 - 25000 Hz |
| Nominal impedance | 4 Ohm |
| Amplifier Requirements | 20 - 200 W |
| Sensitivity (2.83V/1m) | 90 dB |
| Tweeter | 26mm × 36mm (1" × 1.4") Folded Motion Transducer with 133mm × 44mm (5.25" × 1.75") diaphragm |
| Woofer | 2 x 140 mm (5.5 in.) aluminum cone |
| Dimensions (H x W x D) | 929 x 173 x 297 mm / 36.57 x 6.81 x 11.69 in. |
| Weight | 16,8 kg / 35.2 lbs. |
