In this review, we will be comparing two different types of speakers by MartinLogan. MartinLogan Motion 40i is a Floor-standing speaker whereas the Motion 6i is a Center Channel speaker.
Let's have a brief look at the main features
of MartinLogan 40i and MartinLogan 6i first before getting into our more
detailed comparison.
| Key Specs | MartinLogan 40i | MartinLogan 6i |
|---|
| Brand | MartinLogan
United States · founded 1982 | MartinLogan
United States · founded 1982 |
|---|
| Design | 3-way | 2-way |
|---|
| Tweeter | 1.0 x 1.4" Folded Motion | 1.0 x 1.0" Folded Motion |
|---|
| Midrange | 5.5" | — |
|---|
| Woofer | 2 x 6.5" Aluminum | 2 x 3.5" poly cone woofers with rigid dust caps |
|---|
| Frequency response | 40-25k Hz | 120-23k Hz |
|---|
| Sensitivity | 92 dB | 89 dB |
|---|
| Impedance | 4 ohms | 6 ohms |
|---|
| Power range | 20-300 watts | 20-130 watts |
|---|
| Weight | 20.40kg / 44.9lbs | 2.59kg / 5.7lbs |
|---|
| Dimensions (H x W x D) | 41-1/2" x 7-9/16" x 13-1/16"
1055.0 x 193.0 x 332.0mm | 5-1/4" x 17-1/2" x 4"
134.0 x 445.0 x 102.0mm |
|---|
Motion 40i and Motion 6i are members of MartinLogan's Motion series of speakers. Below you can find the loudspeakers from this series.
MartinLogan Motion Series
History
What size room are the MartinLogan 40i and MartinLogan 6i speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
MartinLogan 40i |
MartinLogan 6i |
| Near-field |
Bad |
Poor |
| Small Room |
Poor |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Average |
| Very Large Room |
Average |
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.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
One of the fundamental differences between these two speakers is that Motion 40i is a 3-way design whereas the Motion 6i is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
MartinLogan 40iMartinLogan 6i
MidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
MartinLogan 40i |
MartinLogan 6i |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1.0 x 1.4-inch
|
1.0 x 1.0-inch
|
|
Midrange
|
1 x 5.5-inch |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 3.5-inch
|
Motion 40i features a 1.0 x 1.4" Folded Motion Tweeter, a 5.5" Midrange and 2 x 6.5" Aluminum Woofer with a Crossover frequency at 500Hz and 2600Hz. On the other hand, the Motion 6i features a 1.0 x 1.0" Folded Motion Tweeter and 2 x 3.5" poly cone woofers with rigid dust caps Woofer.
Frequency Response
Motion 40i has a frequency range of 40-25k Hz whereas Motion 6i has a frequency range of 120-23k Hz. With a minimum frequency of 40Hz, the Motion 40i can go significantly deeper on the low side and provide stronger bass compared to the Motion 6i's min frequency of 120Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Motion 40i is a 4 ohms speaker compared to the Motion 6i which has a nominal impedance of 6 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Motion 40i can provide this impedance level.
These two speakers also have different sensitivity levels. Motion 40i sensitivity is rated at 92 dB and the Motion 6i's is rated at 89 dB. This 3 dB difference makes the MartinLogan 40i a more sensitive speaker compared to MartinLogan 6i, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Motion 40i can handle a max power of 300 watts RMS, whereas Motion 6i has a max power handling value of 130 watts RMS, 170 watts less than the Motion 40i.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Input Type and Bi-Amping / Bi-Wiring
Motion 40i features Custom 5-way bi-wire tool-less binding posts posts which make bi-amping or bi-wiring possible. Motion 6i has a Spring post which doesn't feature bi-amping/bi-wiring.
MartinLogan 40i's Custom 5-way bi-wire tool-less binding posts terminals allows Bi-amping or bi-wiring
MartinLogan 6i's Spring post terminals
MartinLogan 40i Port
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare MartinLogan 40i's and MartinLogan 6i's external dimensions. MartinLogan 40i has external dimensions of 1055.0 x 193.0 x 332.0mm (41-1/2 x 7-9/16 x 13-1/16inch) whereas MartinLogan 6i has external dimensions of 134.0 x 445.0 x 102.0mm (5-1/4 x 17-1/2 x 4inch).
MartinLogan 6i is 921mm shorter and 230mm less deeper than MartinLogan 40i but it is also 252mm wider.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the MartinLogan 40i is approximately 640.8cm2 / 99.3inch2 and base area of the MartinLogan 6i is approximately 453.9cm2 / 70.4inch2. The Motion 40i requires 41% more surface area than the Motion 6i which gives it a small disadvantage on placement in tight spaces.
What's in the Box of MartinLogan 40i?
Here are the items that are included inside the box of Motion 40i:
- Floorstanding loudspeaker
- 2 Grilles
- 4 Rubber feet (pre-installed)
- 4 Spike feet (w/ nuts attached)
- Users Manual
- Warranty/Registration Information
What's in the Box of MartinLogan 6i?
Here are the items that come with the Motion 6i:
- LCR loudspeaker
- Grille
- 2 Wall-bracket
- 2 Shoulder bolts
- 4 Rubber bumpers
- Cleaning cloth
- User-feets Manual (En/Fr)
- Installation template
- Product Registration Card