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Martin Logan ML-66i

Installer Series 6.5" Rectangular In-Wall/In-Ceiling Speaker

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$249.95 / ea

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  • Using In-wall Speakers




The Installer Series™ by MartinLogan is a line of affordable high-performance products, featuring custom installation solutions for in-wall, in-ceiling, and outdoor applications. Manufactured to the highest standards of quality, these products are available through authorized specialty custom installation specialists and carry the full MartinLogan warranty.


Frequency Response 75–20,000 Hz ±3dB
Aiming -
Sensitivity 89 dB/2.83 volts/meter
Nominal Impedance Compatible with 4, 6 or 8 ohm rated amplifiers.
Recommended Amplifier Power 15-120 watts per channel
Crossover Frequency 2500 Hz
High Frequency Transducer 3/4" (2.5cm) titanium dome
Low Frequency Driver Two 5.5” (14cm) mineral-filled polypropylene cones
Inputs Spring clip accommodates wire up to 12AWG
Weight 5.9 lbs. (2.7 kg) each
Overall Dimensions
(DiameterxD | HxWxD)
9.3 x 12.7 x 3.4 inches
(23.7cm x 32.3cm x 8.6cm)
Required Opening
(Diameter | HxWxD)
8.25 x 11.625 inches
(20.9cm x 29.5cm)
Projection From Wall Surface 0.2 inches (0.5cm)
Depth Required Behind Wall Surface 3.2 inches (8.1cm)


Color White
DLNA Certified No
Dimensions (WxHxD) Overall Size (dia. x depth) 9.3 x 12.7 x 3.4 inches
Dimensions (WxHxD, metric) Overall Size (dia. x depth) 23.7cm x 32.3cm x 8.6cm
Dimensions (notes) Required ceiling opening 8.25 x 11.625 inches (20.9cm x 29.5cm
Weight (lbs) 5.9
Unit of measurement ea
Power Handling (Nominal) No
Frequency Response +/-3dB 75–20,000 Hz ±3dB
Sensitivity (1W/m) 89dB
Terminals No
Impedance Compatible with 8 ohms
Tweeter 3/4" titanium dome
Midrange Driver -
Woofer Two 5.5” (14cm) mineral-filled polypropylene cones
Crossover Frequencies 2,500 Hz
Crossover Type -


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