MartinLogan Motion F20 Floorstanding Speaker - Each

The Flagship of MartinLogan's Motion Series

The MartinLogan Motion F20 is a 3-way, bottom-ported floorstanding speaker with a Gen2 Obsidian Folded Motion tweeter over a 5.5-inch woven-fiberglass midrange and two 6.5-inch aluminum woofers, in a cabinet built for a larger room.

MartinLogan rates sensitivity at 92 dB into a nominal 4 ohms, and recommends 20 to 300 watts of amplifier power — a modest ask for a tower with this much cone area.

The cabinet is available in Walnut, Gloss Black, or Satin White, and sold each, so a stereo pair is two — order one to match an existing speaker, or a matching pair to start fresh.

Where the Bigger Woofers Earn Their Keep

The Same Tweeter, Scaled-Up Bass

The Gen2 Obsidian Folded Motion tweeter and its Folded Motion Waveguide crown the cabinet, crossing over at 2,600 Hz to a 5.5-inch woven-fiberglass midrange in its own sealed chamber.

Two 6.5-inch aluminum woofers, crossing over at 230 Hz, fire through a downward-facing port — substantial cone area for a tower this size, built for deeper bass, more scale, and an easier match to a bigger room.

The Numbers, and What They Ask of Your Amplifier

MartinLogan quotes a frequency range of 35 Hz to 25 kHz within 3 dB. Sensitivity is 92 dB, nominal impedance is 4 ohms, and MartinLogan recommends 20 to 300 watts of amplifier power.

A pair of custom 5-way binding posts is bi-amp and bi-wire capable. F.A.S.T. outrigger feet, with tool-less height adjustment, keep the cabinet level and stable on any floor, whether it sits on carpet or a hard surface.

Who Is This Floorstanding Speaker Best For?

• You want the flagship of MartinLogan's Motion Series — the same Gen2 Obsidian tweeter used across the line, with larger 6.5-inch woofers for deeper bass and more scale
• You have the room for a taller cabinet — the F20 stands nearly 45 inches tall, with the bass extension and power handling to match
• Your amplifier is good rather than enormous — 92 dB sensitivity and a 20 to 300 watt window mean a quality integrated amplifier is all it needs
• You want one speaker per cabinet, priced and shipped that way — the F20 is sold each, so order two for a stereo pair
• You want real floorstanding bass without a separate subwoofer — the F20 reaches to 35 Hz within 3 dB on its own. For the deepest home-theater effects, add one of our subwoofers and let the towers do what they do best

How Does It Connect to Your System?

Set the cabinet on its F.A.S.T. outrigger feet and use the tool-less height adjustment to level it on any floor. A pair of custom 5-way binding posts accepts a single-wire or bi-wire connection.

Give the drivers time to settle; aluminum and fiberglass cones can take some hours of playback before they loosen up fully.

Two cables, two speakers, and you are listening.

Pairs Well With

What finishes the system around a pair of Motion F20 towers:

• Integrated amplifiers — 20 to 300 watts into 4 ohms is the window MartinLogan gives
• Stereo amplifiers — a separate power amp if you want more headroom
• Speaker cables — the F20 is bi-wire capable, so a bi-wire run is an option here
• Speaker isolation feet — an alternative to the F.A.S.T. outrigger feet on a wood or tile floor

Frequently Asked Questions

Is the price for one speaker or a pair?

One. The F20 is sold each, so order two for a stereo pair, or one to match an existing speaker.

What comes in the box?

The speaker, its magnetic grille, F.A.S.T. outrigger feet pre-installed with tool-less height adjustment, and the owner's manual.

What amplifier do I need?

MartinLogan recommends 20 to 300 watts into 4 ohms. At 92 dB sensitivity, a quality integrated amplifier is enough to drive it well.

Can I bi-wire the F20?

Yes. A pair of custom 5-way binding posts is bi-amp and bi-wire capable.

What's the difference between the F20 and the Motion XT F100?

The XT F100 steps up to a larger Folded Motion XT tweeter, a Kevlar midrange, and a third woofer, for more scale and output, at a higher price.

What finishes are available?

Walnut, Gloss Black, and Satin White.

See It in Action

NotEvenFunny reviews the Motion F20:

NotEvenFunny compares the Motion F20 to a rival tower:

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Learn More

Want to learn more about speaker placement, bi-wiring, or matching an amplifier to your speakers? Visit our Learning Center for guides, tips, and expert advice.