MartinLogan Motion 4i is a 2-way Passive Bookshelf speaker by MartinLogan. It features a 1 x 1.4" Folded Motion Ribbon Tweeter and x 4" Woofer. The speaker has a frequency range of 70-23k Hz and a sensitivity of 90 dB.
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Frequency Response of the MartinLogan Motion 4i Speaker
MartinLogan Motion 4i has a Frequency response range of 70-23k Hz at ±3dB. With a minimum frequency of 70 Hz, it is hard to expect a strong bass response from Motion 4i so depending on your use case, using a subwoofer will significantly help to widen the response range.
Visit our Powered Subwoofers section to find out more about the available subwoofer options.
Here we have a comparison of how Motion 4i's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
Impedance and Sensitivity
MartinLogan Motion 4i's nominal impedance level is
4 ohms and has a sensitivity of
90 dB.
Sensitivity
Bookshelf Speakers
Nominal Impedance of the 4 Ohms means that the MartinLogan Motion 4i is a difficult to drive speaker from nominal Impedance perspective, make sure that you choose an amplifier than can provide 4 Ohms for this speaker.
Many AVRs (audio/video receiver) in the market may have difficulty when the speakers dip below the 4 Ohms levels (this may cause clipping or even physical damage), so we recommend to not pair the MartinLogan Motion 4i with an AVR but use an Integrated Amplifier instead.
Sensitivity
90dB of the MartinLogan Motion 4i is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise.
Check the amplifiers that are in a similar price range to the MartinLogan Motion 4i:
Input Type
Motion 4i features Spring post type connectors. Bi-amping and Bi-wiring are not possible.
MartinLogan Motion 4i External Dimensions and Weight
MartinLogan Motion 4i has external dimensions of (Height x Width x Depth) .
Weight
All Bookshelf Speakers
Available colors
MartinLogan Motion 4i is available in Gloss Black.
Wall Mounting
Motion 4i doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Recommended Accessories
Here is a list of accessories that we think you may need for the MartinLogan Motion 4i.
- Speaker Cable and Connectors
- Vibration Isolators: IsoAcoustics isolators more affordable options too.
- Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
Warranty
5 Yrs w/ Registration of parts warranty and 5 Yrs w/ Registration of labor warranty is generally provided by the manufacturer.