The Motion Foundation F1 is a genuinely slim floorstander, which is the point of it. Three small bass cones stacked vertically move as much air as one large driver while keeping the cabinet narrow enough to disappear against a wall.
Splitting bass across three drivers has a second benefit beyond width. Each cone travels less for the same output, so distortion stays low where a single hard-working driver would begin to compress.
A dedicated midrange cone sits above them, freed entirely from low-frequency duty, and the folded tweeter handles everything above. Voices come through a driver doing only one job.
Sensitivity is high for a four ohm design and the cabinet is manageable for one person to position. It fits a living room that wants full-range sound without a pair of wide towers in the corners.
MartinLogan Motion Foundation F1 official product page
| ITEM | DESCRIPTION |
|---|---|
| Triple bass array | Three small cones move the air of one large driver in a narrow cabinet. |
| Low excursion per driver | Each cone travels less, keeping distortion down at level. |
| Dedicated midrange driver | Voices arrive from a cone doing nothing else. |
| Folded Motion tweeter | The same low-mass pleated diaphragm used across the range. |
| Slim floorstanding footprint | Full-range output without a wide tower in the corner. |
| DETAIL | VALUE |
|---|---|
| Driver complement | 1 x 0.94" x 1" Gen2 Folded Motion Tweeter S, 1 x 5.5" (14cm) aluminium cone midrange, 3 x 5.5" (14cm) aluminium cone bass drivers |
| Frequency response | 41 Hz - 23 kHz ± 3 dB |
| Sensitivity | 92 dB |
| Nominal impedance | 4 ohms |
| Recommended amplifier power | 15 - 200 watts |
| Crossover frequency | 240 Hz, 2,700 Hz (3-way) |
| Dimensions | 105.2cm x 21cm x 36.7cm (41-7/16" x 8-3/8" x 14-7/16") |
| Weight | 21.1 kg each |
| ITEM | QUANTITY |
|---|---|
| Motion Foundation F1 loudspeaker | Pair |
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