SpeakerDecision
  • SPEAKERS
    • By Type
      Passive Bookshelf Speakers Passive Floor-standing Speakers Passive Center Channel Speakers Passive In-wall Speakers All Passive Speakers Powered Subwoofers Powered Stereo Speakers
      By Brand
      Acoustic Energy Audio-Technica Audioengine Bowers Wilkins Buchardt Cambridge Audio DALI Definitive Technology Dynaudio ELAC Emotiva Fluance Focal Genelec GoldenEar Jamo JBL Kanto KEF KLH Klipsch Leak Mackie MartinLogan McIntosh Mission MoFi Monitor Audio Nuvo Onkyo OSD Paradigm Polk Audio PSB Q Acoustics REL Revel Russound Sennheiser Sonos Sonus Faber Sony SVS Technics Triangle Victrola Wharfedale
  • AMPLIFIERS
    • By Type
      All Amplifiers Integrated Amplifiers Stereo Receivers Streaming Amplifiers
      By Brand
      Advance Paris Anthem Arcam AudioControl Audioengine Audiolab Bluesound Bose Buchardt Cambridge Audio Denon Devialet ELAC HiFi Rose Integra JBL LEAK Marantz Mark Levinson McIntosh Michi MISSION NAD Naim Onkyo OSD Parasound Peachtree Primare PS Audio Rega Roksan Rotel Sonos Sony SVS Technics WiiM Yamaha
  • SMART FIND
  • BLOG

MartinLogan Dynamo IW S vs MartinLogan Dynamo IW-O Comparison

x
Speaker to replace
Change

MartinLogan Dynamo IW S

Passive In-wall | 35-190 Hz

MartinLogan Dynamo IW S
CHECK PRICE
Change
    
MartinLogan Dynamo IW-O

Passive In-wall | 30-190Hz

MartinLogan Dynamo IW-O
CHECK PRICE
MartinLogan Dynamo IW S MartinLogan Dynamo I...
See at AMAZON
MartinLogan Dynamo IW-O MartinLogan Dynamo I...
See at AMAZON
MartinLogan Dynamo I...
See at AMAZON
MartinLogan Dynamo I...
See at AMAZON
MartinLogan Dynamo IW S vs MartinLogan Dynamo IW-O Speaker Comparison

In this review, we will be comparing Dynamo IW S and MartinLogan Dynamo IW-O, two Passive In-wall speakers by MartinLogan

Let's have a brief look at the main features of MartinLogan Dynamo IW S and MartinLogan Dynamo IW-O first before getting into our more detailed comparison.

MartinLogan Dynamo IW S Key Specs

  • 1-way Design
  • " Tweeter
  • 2 x 8" Woofer
  • 35-190 Hz Frequency Response
  • Impedance: 8ohms
  • Weight:kg
  • Dimensions (H x W x D): " x 10-15/16" x 4-1/2"

MartinLogan Dynamo IW-O Key Specs

  • 1-way Design
  • " Tweeter
  • 2 x 8" Woofer
  • 30-190Hz Frequency Response
  • Impedance: 8ohms
  • Power Range:50-400watts
  • Weight:kg
  • Dimensions (H x W x D): " x 10.73" x 4.1"

Dynamo IW S and MartinLogan Dynamo IW-O are members of MartinLogan's Dynamo series of speakers. Below you can find the loudspeakers from this series.

MartinLogan Dynamo Series History
Model Body Frequency SensitivityImpedance Woofer
MartinLogan Dynamo IW-O
In-wall 30-190Hz 8Ω 2 x 8"
MartinLogan Dynamo IW S
In-wall 35-190 Hz 8Ω 2 x 8"

In the following sections, we will get into more detail in order to better understand how the MartinLogan Dynamo IW S and MartinLogan Dynamo IW-O 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 Dynamo IW S and MartinLogan Dynamo IW-O are 1-way speakers.

Driver MartinLogan Dynamo IW S MartinLogan Dynamo IW-O
Driver Setup 1-way 1-way
Tweeter -inch -inch
Midrange - -
Woofer 2 x 8-inch 2 x 8-inch

Dynamo IW S features a " Tweeter and 2 x 8" Woofer . On the other hand, the MartinLogan Dynamo IW-O features a " Tweeter and 2 x 8" Woofer .

Frequency Response

Dynamo IW S has a frequency range of 35-190 Hz whereas MartinLogan Dynamo IW-O has a frequency range of 30-190Hz. With a minimum frequency of 30Hz, the MartinLogan Dynamo IW-O can go significantly deeper on the low side and provide stronger bass compared to the Dynamo IW S's min frequency of 35Hz.

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 In-wall class in our database.

Low Frequency

In-wall Speakers

Dynamo IW S
MartinLogan Dynamo IW-O
Min
Average
Max
High Frequency

In-wall Speakers

MartinLogan Dynamo IW S
MartinLogan Dynamo IW-O
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.

Input Type and Bi-Amping / Bi-Wiring

Dynamo IW S features Spring post type posts and MartinLogan Dynamo IW-O has a Spring post type posts. None of these speakers feature bi-amping/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 Dynamo IW S's and MartinLogan Dynamo IW-O's external dimensions. MartinLogan Dynamo IW S has external dimensions of ( ) whereas MartinLogan Dynamo IW-O has external dimensions of ( ) .

In this case, we can see that MartinLogan Dynamo IW S and MartinLogan Dynamo IW-O have the exact same height, width and thickness.

What's in the Box of MartinLogan Dynamo IW-O?

Here are the items that come with the MartinLogan Dynamo IW-O:
  • In-wall subwoofer
  • Grille
  • Cutout Template

  • Reasons to choose MartinLogan Dynamo IW S over MartinLogan Dynamo IW-O

    Reasons to choose MartinLogan Dynamo IW-O over MartinLogan Dynamo IW S

    Low Frequency Response 30 Hz vs 35 Hz Generates deeper bass
    Price per pair* 1398USD vs 1600USD costs less (*prices may change depending on the seller, location and time)
    MartinLogan Dynamo IW S vs MartinLogan Dynamo IW-O Specs Table
    Detailed comparison of specifications
    General MartinLogan Dynamo IW S MartinLogan Dynamo IW-O
    Brand MartinLogan MartinLogan
    Speaker Type Passive In-wall Speaker Bookshelf speakers
    Impedance 8 ohms 8 ohms
    Frequency Response 35-190 Hz 30-190Hz
    Drivers
    Woofer Quantity 2 2
    Woofer Size 8" 8"
    Woofer Composition
    Woofer Surround Material n/a Thermal Plastic Rubber (TPR)
    Tweeter Size - -
    Aimable Tweeter No No
    Midrange Driver No No
    Physical Specs
    Height mm (0") mm (0")
    Width mm (0") mm (0")
    Depth mm (0") mm (0")
    Enclosure
    Moisture Resistancy No No
    Connections
    Biamp Inputs n/a No
    Other
    Parts Warranty 5 Years 5 Years
    Labor Warranty 5 Years 5 Years

    Most Popular Speakers
    Klipsch Reference R-51M
    Klipsch R-51M
    2-way | 93 dB | 8 ohms
    ELAC Debut 2.0 B6.2
    ELAC Debut 2.0 B6.2
    2-way | 87 dB | 6 ohms
    Wharfedale Elysian 2
    Wharfedale Elysian 2
    3-way | 89 dB | 4 ohms
    KEF Q150
    KEF Q150
    2-way | 86 dB | 8 ohms
    Bowers & Wilkins 606 S2 Anniversary Edition
    B&W 606 S2
    2-way | 88 dB | 8 ohms
    Klipsch Reference Premiere RP-500M
    Klipsch RP-500M
    2-way | 93 dB | 8 ohms
    Wharfedale EVO5.1
    Wharfedale EVO5.1
    2-way | 87 dB | 4 ohms
    Wharfedale EVO4.1
    Wharfedale EVO4.1
    2-way | 87 dB | 8 ohms
    Copyright © 2026 by SpeakerDecision
    About Privacy Contact US Camera Decision

    Report a Correction