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MartinLogan 8i vs MartinLogan 35XTi Comparison

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MartinLogan 8i

Passive Center Channel | 70-23k Hz

MartinLogan Motion 8i
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MartinLogan 35XTi

Passive Bookshelf | 50-25k Hz

MartinLogan Motion 35XTi
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MartinLogan 8i MartinLogan 8i
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MartinLogan 35XTi MartinLogan 35XTi
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MartinLogan 8i
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MartinLogan 35XTi
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MartinLogan 8i vs MartinLogan 35XTi Speaker Comparison

In this review, we will be comparing two different type of speakers by MartinLogan. MartinLogan Motion 8i is a Center Channel speaker whereas the Motion 35XTi is a Bookshelf speaker.

Let's have a brief look at the main features of MartinLogan 8i and MartinLogan 35XTi first before getting into our more detailed comparison.

MartinLogan 8i Key Specs

  • 2-way Design
  • 1.0 x 1.4" Folded Motion Tweeter
  • 2 x 4" poly cone woofers with rigid dust caps Woofer
  • 70-23k Hz Frequency Response
  • 89 dB Sensitivity
  • Impedance: 4ohms
  • Power Range:20-180watts
  • Weight:3.86kg
  • Dimensions (H x W x D): 142.0" x 22-1/8" x 5-1/4"( 142.0 x 562.0 x 134.0mm )

MartinLogan 35XTi Key Specs

  • 2-way Design
  • 1.25 x 2.4" Folded Motion XT Tweeter
  • 6.5" Aluminum Woofer
  • 50-25k Hz Frequency Response
  • 92 dB Sensitivity
  • Impedance: 4ohms
  • Power Range:20-250watts
  • Weight:8.40kg
  • Dimensions (H x W x D): 343.0" x 7.5" x 11.8"( 343.0 x 192.0 x 300.0mm )

Motion 8i and Motion 35XTi are members of MartinLogan's Motion series of speakers. Below you can find the loudspeakers from this series.

MartinLogan Motion Series History
Model Body Frequency SensitivityImpedance Woofer
MartinLogan 15i
  
Bookshelf 60-25k Hz 92 dB5Ω 1 x 5.25"
MartinLogan 35XTi
Bookshelf 50-25k Hz 92 dB4Ω 1 x 6.5"
MartinLogan 60XTi
  
Floor-standing 35-25k Hz 94 dB4Ω 2 x 8"
MartinLogan 50XTi
  
Center Channel 50-25k Hz 94 dB4Ω 2 x 6.5"
MartinLogan LX16
  
Bookshelf 60-25k Hz 92 dB5Ω 1 x 5.25"
MartinLogan 40i
  
Floor-standing 40-25k Hz 92 dB4Ω 2 x 6.5"
MartinLogan 20i
  
Floor-standing 46-25k Hz 90 dB4Ω 2 x 5.5"
MartinLogan 30i
  
Center Channel 65-25k Hz 91 dB4Ω 1 x 5.25"
MartinLogan 6i
  
Center Channel 120-23k Hz 89 dB6Ω 2 x 3.5"
MartinLogan 8i
Center Channel 70-23k Hz 89 dB4Ω 2 x 4"

What size room are the MartinLogan 8i and MartinLogan 35XTi 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 8i MartinLogan 35XTi
Near-field Poor Poor
Small Room Average Poor
Mid-size Room Good Good
Large Room Average Good
Very Large Room Poor Average

(* 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.)

In the following sections, we will get into more detail in order to better understand how the MartinLogan 8i and MartinLogan 35XTi compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.


Drivers

Both Motion 8i and Motion 35XTi are 2-way speakers.

Driver MartinLogan 8i MartinLogan 35XTi
Driver Setup 2-way 2-way
Tweeter 1.0 x 1.4-inch 1.25 x 2.4-inch
Midrange - -
Woofer 2 x 4-inch 1 x 6.5-inch

Motion 8i features a 1.0 x 1.4" Folded Motion Tweeter and 2 x 4" poly cone woofers with rigid dust caps Woofer . On the other hand, the Motion 35XTi features a 1.25 x 2.4" Folded Motion XT Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2200Hz.

Frequency Response

Motion 8i has a frequency range of 70-23k Hz whereas Motion 35XTi has a frequency range of 50-25k Hz. With a minimum frequency of 50Hz, the Motion 35XTi can go significantly deeper on the low side and provide stronger bass compared to the Motion 8i's min frequency of 70Hz.

Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Center Channel class in our database.

Low Frequency

Center Channel Speakers

Motion 8i
Motion 35XTi
Min
Average
Max
High Frequency

Center Channel Speakers

MartinLogan 8i
MartinLogan 35XTi
Min
Average
Max

None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

Motion 8i and Motion 35XTi have the same Impedance of 4 ohms but where they differ is the sensitivity levels. Motion 8i sensitivity is rated at 89 dB and the Motion 35XTi's is at 92 dB. This 3 dB difference makes the MartinLogan 35XTi a more sensitive speaker compared to MartinLogan 8i, hence will play louder with the same amount of watts.

One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the Motion 8i and the Motion 8i can provide this impedance level.

Sensitivity

Center Channel Speakers

Motion 8i
Motion 35XTi
Min
Average
Max

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.

Motion 8i can handle a max power of 250 watts RMS from the amp the whereas Motion 8i has a max power handling value of 180 watts RMS , 70 watts less than the Motion 35XTi.

Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.

Input Type and Bi-Amping / Bi-Wiring

Motion 35XTi features Custom 5-way bi-wire tool-less binding posts posts which make bi-amping or bi-wiring possible. Motion 8i has a Spring post which doesn't feature bi-amping/bi-wiring.

MartinLogan 8i Terminals
MartinLogan 8i's Spring post terminals

MartinLogan 35XTi Terminals
MartinLogan 35XTi's Custom 5-way bi-wire tool-less binding posts terminals allows Bi-amping or bi-wiring

Physical Specs

Size of a speaker can sometimes become 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 8i's and MartinLogan 35XTi's external dimensions. MartinLogan 8i has external dimensions of 142.0 x 562.0 x 134.0mm ( 5-9/16 x 22-1/8 x 5-1/4inch) whereas MartinLogan 35XTi has external dimensions of 343.0 x 192.0 x 300.0mm ( 13.5 x 7.5 x 11.8inch) .

MartinLogan 8i is 201mm shorter and 166mm less deeper than MartinLogan 35XTi but it is also 370mm 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 8i is approximately 753.1cm2 / 116.7inch2 and base area of the MartinLogan 35XTi is approximately 576.0cm2 / 89.3inch2. The Motion 8i requires 31% more surface area than the Motion 35XTi which gives it a small disadvantage on placement in tight spaces.

What's in the Box of MartinLogan 8i?

Here are the items that are included inside the box of Motion 8i:
  • LCR loudspeaker
  • Grille
  • 2 Wall-bracket
  • 2 Shoulder bolts
  • 4 Rubber bumpers
  • Cleaning cloth
  • User-feets Manual (En/Fr)
  • Installation template
  • Product Registration Card
  • What's in the Box of MartinLogan 35XTi?

    Here are the items that come with the Motion 35XTi:
  • Bookshelf loudspeaker
  • Grille
  • 4 Rubber feet
  • 2 Jumper-straps (pre-installed)
  • Users Manual
  • Warranty/Registration Information

  • Reasons to choose MartinLogan Motion 8i over MartinLogan Motion 35XTi
    Number of Woofers 2 vs 1 More woofers
    Height 142mm vs 343mm Easier to fit in smaller spaces
    Price per pair* 450USD vs 1500USD costs less (*prices may change depending on the seller, location and time)

    Reasons to choose MartinLogan Motion 35XTi over MartinLogan Motion 8i

    Max Input Power 250 watts vs 180 watts Handle more power from your amplifier
    Sensitivity 92 dB vs 89 dB Play louder with same amount of amplification power
    Woofer Size 6.5 inches vs 4 inches Larger woofer
    Low Frequency Response 50 Hz vs 70 Hz Generates deeper bass
    High Frequency Response 25k Hz vs 23k Hz Generates higher frequency
    Base Surface Area 576cm2 vs 753cm2 Takes less floor space
    MartinLogan 8i vs MartinLogan 35XTi Specs Table
    Detailed comparison of specifications
    General MartinLogan Motion 8i MartinLogan Motion 35XTi
    Brand MartinLogan MartinLogan
    Speaker Type Center channel speaker Bookshelf speakers
    Power Range 20-180 watts 20-250 watts
    Sensitivity 89 dB 92 dB
    Impedance 4 ohms 4 ohms
    Frequency Response 70-23k Hz 50-25k Hz
    Drivers
    Woofer Quantity 2 1
    Woofer Size 4" 6.5"
    Woofer Composition poly cone woofers with rigid dust caps Aluminum
    Woofer Surround Material n/a Rubber
    Tweeter Size 1.0 x 1.4" 1.25 x 2.4"
    Tweeter Type Folded Motion Folded Motion XT
    Aimable Tweeter No No
    Midrange Driver No No
    Crossover Frequency n/a 2200Hz
    Firing Direction n/a rear
    Suggested Break-in Period Allow 72 hours of break-in at 90 dB Allow 72 hours of break-in at 90 dB
    Physical Specs
    Height 142.0mm (5.6") 343.0mm (13.5")
    Width 562.0mm (22.1") 192.0mm (7.6")
    Depth 134.0mm (5.3") 300.0mm (11.8")
    Weight 3.86kg (8.5lbs) 8.40kg (18.5lbs)
    Enclosure Passive Radiator Bass Reflex
    Finish n/a MDF/Lacquer
    Available Colors Gloss Black, Matt White, Red Walnut Gloss Black, Matt White, Red Walnut
    Mounting Bracket No No
    Recommended Stand Height n/a 24-26"
    Grille Yes Yes
    Moisture Resistancy No No
    Connections
    Biamp Inputs n/a Yes
    Other
    Parts Warranty 5 Yrs w/ Registration 5 Years
    Labor Warranty 5 Yrs w/ Registration 5 Years

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