In this review, we will be comparing Dynamo IW S and IWSub 1010, two Passive In-wall speakers from MartinLogan and Definitive Technology. Let's have a brief look at the main features of MartinLogan Dynamo IW S and Definitive IWSub 1010 first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.MartinLogan Dynamo IW S and Definitive IWSub 1010 have a totally different setup: the MartinLogan Dynamo IW S features 2 x 8-inch drivers whereas the IWSub 1010 features 1 x 10-inch drivers.
Frequency Response
Dynamo IW S has a frequency range of 35-190 Hz whereas IWSub 1010 has a frequency range of 16-200Hz. With a minimum frequency of 16Hz, the IWSub 1010 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
High Frequency
In-wall Speakers
Input Type and Bi-Amping / Bi-Wiring
Dynamo IW S features Spring post type posts and IWSub 1010 has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.
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 Dynamo IW S's and Definitive IWSub 1010's external dimensions. MartinLogan Dynamo IW S has external dimensions of 490.5 x 277.8 x 114.3mm () whereas Definitive IWSub 1010 has external dimensions of 505.0 x 366.0 x 97.0mm (19.8750-inch x 14.3750-inch x 3.8125-inch).
MartinLogan Dynamo IW S is 88.2mm narrower and 14.5mm shorter than Definitive IWSub 1010 but it is also 17.3mm deeper.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The MartinLogan Dynamo IW S weighs 12.11kg / 26.6lbs and the Definitive IWSub 1010 weighs 10.43kg / 22.9lbs. This makes the Dynamo IW S 16% heavier than the IWSub 1010.
Here is a comparison of how Dynamo IW S and IWSub 1010's weights compare with the average, max and min weights in Passive In-wall class.
Weight
All In-wall Speakers
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
 Number of Woofers |
2
vs
1
|
More woofers |
 Height |
490mm
vs
505mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
317cm2
vs
355cm2
|
Takes less floor space |
| Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
16 Hz
vs
35 Hz
|
Generates deeper bass |
 High Frequency Response |
200 Hz
vs
190 Hz
|
Generates higher frequency |
 Passive Radiator |
1 x 10-inch
vs
None
|
Increases the bass performance |
 Price per pair* |
999USD
vs
1600USD
|
costs less (*prices may change depending on the seller, location and time) |
Size, drawn to scale
Both subwoofers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same floor and pushed back to the same wall, so the bigger one visibly takes more of the room.
Definitive IWSub 1010 needs about 12% more floor area. MartinLogan Dynamo IW S stands 17mm further into the room. Definitive IWSub 1010 is 15mm taller.
| General |
MartinLogan Dynamo IW S |
Definitive Technology IWSub 10/10 |
| Brand |
MartinLogan |
Definitive Technology |
| Speaker Type |
Passive Subwoofer |
Passive Subwoofer |
| Impedance |
8 ohms |
4 ohms |
| Frequency Response |
35-190 Hz |
16-200Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
8" |
10" |
| Woofer Composition |
|
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
Physical Specs |
|
|
| Height |
490.5mm (19.3") |
505.0mm (19.9") |
| Width |
277.8mm (10.9") |
366.0mm (14.4") |
| Depth |
114.3mm (4.5") |
97.0mm (3.8") |
| Weight |
12.11kg (26.6lbs) |
10.43kg (22.9lbs) |
| Enclosure |
|
In-wall |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
n/a |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |
Different price classes - MartinLogan Dynamo IW S costs roughly 1.6x what Definitive IWSub 1010 does. Before paying it, read the note below about two smaller subwoofers.
| Area | Better | Why |
|---|
| Bass depth | B | Definitive IWSub 1010 goes deeper - 16Hz against 35Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Driver area | A | MartinLogan Dynamo IW S moves more air: 2 x 8" against 10" is 1.28x the cone area, not the 1.13x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Price | B | Definitive IWSub 1010 costs less - $999 against $1,600, about 38% less. |
A MartinLogan Dynamo IW S B Definitive IWSub 1010
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both subwoofers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Neither runs away with it - they trade advantages. Let your room size and where the box can actually stand settle it. Two small subwoofers beat one big one in most rooms - a pair evens out the room modes in a way no single box can, whatever its specs. At $999 each, two Definitive IWSub 1010 cost about $1,998 against $1,600 for one of the other, which is worth a thought.
One thing outweighs everything above: where the subwoofer stands. Room modes can add or remove 10dB or more at a given seat, which is far larger than any difference on this page. Before spending more, try the sub in two or three positions - the crawl test, where you put it in the listening seat and crawl the room to find where the bass sounds best, costs nothing and usually beats an upgrade.