Motion 8i vs M&K Sound D85
The D85's woofer is 5.25" against the Motion 8i's 4". Both share sensitivity (89 dB), impedance (4Ω), and ways (2).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersBookshelf Speakers
Estimated price (community-sourced)
$450
Around — community and catalog average, updates slowly
About the Motion 8i
The MartinLogan Motion 8i is a versatile center channel or multi-purpose speaker featuring a 1" x 1.4" Folded Motion tweeter for detailed highs and two 4" poly/paper cone woofers for dynamic bass. It supports horizontal or vertical mounting with included wall brackets, has a high-gloss piano black finish, and uses a proprietary Vojtko crossover for seamless performance. Inspired by MartinLogan's electrostatic technology, it delivers clear, refined sound with wide dispersion in a compact enclosure.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 89 dB SPL @ 1W/1m
- Impedance
- 4Ω
- Frequency Response
- 70 Hz - 23 kHz
- Power Handling
- 90W
- Min. Amplifier Power
- 20W
- Max. Amplifier Power
- 180W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 2-way
- Driver Type
- Folded Motion tweeter, poly/paper cone woofers
- Driver Size
- 4"
- Driver Count
- 3
- Enclosure Type
- sealed
- Crossover Frequency
- 3.0 kHz
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 562 × 141 × 133 mm (W × H × D)
- Weight
- 3.86 kg (9 lbs)
Key Specifications
Sensitivity: 89 dB
Impedance: 4Ω
Frequency: 70-23000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions