MartinLogan Motion 15 is a 2-way Passive Bass Reflex Bookshelf speaker by MartinLogan. It features a 1.0 x 1.4" Folded Motion Tweeter and 1 x 5.25" Aluminum Woofer. The speaker has a frequency range of 60-25k Hz and a sensitivity of 92 dB.
Room Size Suitability
The size of the room where you plan to use the MartinLogan 15 is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
MartinLogan's Motion Series of Loudspeakers
Motion 15 is a member of MartinLogan's Motion series of Passive speakers. Below you can see the main specs of these speakers.
MartinLogan Motion Series Speakers
MartinLogan Motion Series Speakers
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Frequency Response of the MartinLogan 15 Speaker
MartinLogan 15 has a Frequency response range of 60-25k Hz at ±3dB and Power Range of 20-200 watts. With a minimum frequency of 60 Hz, Motion 15 delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.
Visit our Powered Subwoofers section to find out more about the available subwoofer options.
Here we have a comparison of how Motion 15'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
Crossover frequency of the MartinLogan 15?
The Crossover frequency of the Motion 15 is set to 2700Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
MartinLogan 15's nominal impedance level is
5 ohms and has a sensitivity of
92 dB.
Sensitivity
Bookshelf Speakers
Nominal Impedance of the 5 Ohms makes the MartinLogan Motion 15 a relatively difficult to drive speaker compared to more frequently found 8 ohms speakers from nominal Impedance perspective.
Sensitivity
92dB of the MartinLogan Motion 15 is considered a high sensitivity compared to average stereo speaker which makes Motion 15 an easy to drive from Sensitivity perspective. If you are planning to power your speaker with a Tube amp which are generally very low power, the MartinLogan 15 will be a good choice.
Check the amplifiers that are in a similar price range to the MartinLogan 15:
Input Type
Motion 15 features Custom 5-way tool-less binding posts type connectors. Bi-amping and Bi-wiring are not possible.
Recommended Break In
Allow 72 hours of break-in at 90 dB.
MartinLogan 15 External Dimensions and Weight
MartinLogan 15 has external dimensions of (Height x Width x Depth) 11.4 x 6.8 x 9.4inch (290.0 x 173.0 x 240.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of MartinLogan 15 is approximately 415.2cm2 / 64.4inch2.
WeightThe MartinLogan 15 weighs 5.40kg / 11.9lbs per piece. Here is a comparison of how Motion 15's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
Cabinet type and Materials
MartinLogan 15 has a
Bass Reflex type cabinet and a Piano Lacquer finish. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
Speaker Feet
MartinLogan 15 comes with
4 Rubber bumpers which you can use to secure your loudspeaker on the surface that you are putting on. It is always recommended to use some kind of feet under all types of speakers. Besides limiting the movement of the speakers, it also compensates for non-flat surfaces and limits the contact surface area of the speaker. Rubber based feet also help isolating the vibrations within certain frequency ranges.
Port Position
MartinLogan 15 is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.
Available colors
MartinLogan 15 is available in Gloss Black, Matt White and Red Walnut.
Wall Mounting
Motion 15 doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Does the MartinLogan 15 come with a Grille?
Motion 15 comes with magnetic grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible. Since the included grille of the Motion 15 is magnetic type, it is very easy to put it on and off.
What's in the Box of MartinLogan 15?
Here are the items that are included inside the box of Motion 15:
Bookshelf loudspeaker Grille 4 Rubber feet Users Manual Warranty/Registration Information
Recommended Accessories
Here is a list of accessories that we think you may need for the MartinLogan Motion 15.
- 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.
User's Manual
For more information about how to setup, use and maintain the MartinLogan Motion 15, use the direct link below to download the official manual document:
Download User Manual for MartinLogan 15
Official Brochure
Here is a link to download the official brochure for the MartinLogan Motion 15 speaker:
Official Brochure for MartinLogan 15
Official Product Page
Official manufacturer's product page for the MartinLogan Motion 15 speaker can be found below:
Official Product Page for MartinLogan 15
Warranty
5 Yrs w/ Registration of parts warranty and 5 Yrs w/ Registration of labor warranty is generally provided by the manufacturer.