MartinLogan MO8IBL Motion 8i Center Channel Speaker, Single Speaker (Gloss Black)

Home theaters and music rooms get the open, detailed sound of folded-ribbon technology from the MartinLogan Motion 8i, a gloss black center channel speaker sold each.

A Folded Motion transducer with a 1 x 1.4 in driver handles the highs and a two 4 in paper cones covers the low end, giving 70 Hz – 23 kHz response at 89 dB. It uses push-style banana binding posts and ships with two wall mount brackets.

Key Features

• Folded Motion tweeter: 1 x 1.4 in transducer
• Low-frequency driver: two 4 in paper cones
• Frequency response: 70 Hz – 23 kHz
• Sensitivity: 89 dB
• Impedance: 4 ohms nominal
• Cabinet: Sealed
• Inputs: Push-style banana-compatible binding posts
• Finish: Gloss black

Ideal For

• Home theater: front, center or surround
• Music rooms: folded-ribbon detail
• Integrators: wall mount included

MartinLogan Motion 8i Center Channel Speaker, Folded Motion Tweeter, 70 Hz – 23 kHz, 89 dB, Gloss Black (Each) Specifications

MartinLogan Motion 8i technical specifications, grouped by feature

Specification	Details
Acoustic Performance
High-Frequency Driver	1 x 1.4 in Folded Motion transducer
Low-Frequency Driver	two 4 in paper cones
Frequency Response	70 Hz – 23 kHz
Sensitivity	89 dB
Nominal Impedance	4 ohms
Crossover Frequency	3.0 kHz
Physical & Mounting
Dimensions (H x W x D)	5.6 x 22 x 5.2 in (14.2 x 56 x 13.2 cm)
Weight	8.5 lb (3.85 kg) each
Additional Features
Cabinet	Sealed
Binding Posts	Push style with banana jacks
Finish	Gloss black
Included Accessories	Two wall mount brackets
General
Brand	MartinLogan
Model	Motion 8i
Manufacturer Part Number	MO8IBL

Specifications are verified against the MartinLogan manufacturer data sheet (October 2026) and may change without notice. Confirm critical requirements with MartinLogan before ordering.

Warranty & Support

Planning a multi-room or multi-site install? Request a quote from Robertson AV for 5 or more units, or call us at 800-919-6548 or email orders@robertsonav.com. Free ground shipping on U.S. orders. Schools, businesses, government agencies and houses of worship: ask us about project and quantity pricing.