MartinLogan EFX Specification
| System type | 2-way |
| Enclosure type | Bass-reflex |
| Frequency response ± 3dB | 68 - 22000 Hz |
| Nominal impedance | 6 Ohm |
| Amplifier Requirements | 20 - 300 W |
| Sensitivity (2.83V/1m) | 90 dB |
| Tweeter | 710mm × 220mm (28" × 8.6") electrostaic transducer XStat |
| Woofer | 165 mm (6.5 in.) |
| Dimensions (H x W x D) | 1239 x 238 x 165 mm / 48.78 x 9.37 x 6.5 in. |
| Weight | 11,1 kg / 24.2 lbs. |
