In this review, we will be comparing Dynamo 600X and Dynamo 400, two Powered Subwoofer speakers by MartinLogan. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of MartinLogan 600X and MartinLogan 400 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the MartinLogan 600X and MartinLogan 400 compare and hopefully end up with enough arguments to decide which one of these subwoofers 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
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both MartinLogan 600Xand MartinLogan 400 have a single woofer setup however the MartinLogan 600X's woofer is 10-inch whereas the MartinLogan 400 features a 8-inch woofer.
Frequency Response
Dynamo 600X has a frequency range of 27-200 Hz whereas Dynamo 400 has a frequency range of 30-200 Hz. With a minimum frequency of 27Hz, the Dynamo 600X can go slightly deeper then the Dynamo 400's min frequency of 30Hz.
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 Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
High Frequency
Subwoofer Speakers
Cabinet Type
Both MartinLogan 600X and MartinLogan 400 have Bass reflex type cabinets.
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 600X's and MartinLogan 400's external dimensions. MartinLogan 600X has external dimensions of 415.0 x 369.0 x 420.0mm ( 16-5/16 x 14-1/2 x 16-1/2inch) whereas MartinLogan 400 has external dimensions of 385.0 x 339.0 x 388.0mm ( 15-1/8 x 13-5/16 x 15-1/4inch) .
MartinLogan 600X is clearly the larger of the two speakers. Its body is 30mm wider, 30mm taller and 32mm deeper than MartinLogan 400.
Below you can see the front view size comparison of MartinLogan 600X and MartinLogan 400 in scale.
Comparison image of MartinLogan 600X and MartinLogan 400 Size and External Dimensions
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 600X is approximately 1549.8cm2 / 240.2inch2 and base area of the MartinLogan 400 is approximately 1315.3cm2 / 203.9inch2. The Dynamo 600X requires 18% more surface area than the Dynamo 400 which gives it a small disadvantage on placement in tight spaces.
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 600X weighs 15.91kg / 35lbs and the MartinLogan 400 weighs 12.95kg / 28.5lbs. This makes the Dynamo 600X 23% heavier than the Dynamo 400.
Here is a comparison of how Dynamo 600X and Dynamo 400's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of MartinLogan 600X?
Here are the items that are included inside the box of Dynamo 600X:
Powered subwoofer6.5-feet AC power cordUser-feets Manual
What's in the Box of MartinLogan 400?
Here are the items that come with the Dynamo 400:
Powered subwoofer6.5-feet AC power cordUser-feets Manual
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
27 Hz
vs
30 Hz
|
Generates deeper bass |
 App-Based Control |
iOS,Android
vs
None
|
Control the speaker via an app |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
 Height |
385mm
vs
415mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1315cm2 (339x388mm)
vs
1549cm2 (369x420mm)
|
Takes less floor space |
 Price per pair* |
500USD
vs
700USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
MartinLogan Dynamo 600X |
MartinLogan Dynamo 400 |
| Brand |
MartinLogan |
MartinLogan |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
120 watts |
75 watts |
| Frequency Response |
27-200 Hz |
30-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
120-watt RMS |
75-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
8" |
| Woofer Composition |
Polypropylene |
Polypropylene |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
bottom |
bottom |
Physical Specs |
|
|
| Height |
415.0mm (16.3") |
385.0mm (15.2") |
| Width |
369.0mm (14.5") |
339.0mm (13.3") |
| Depth |
420.0mm (16.5") |
388.0mm (15.3") |
| Weight |
15.91kg (35lbs) |
12.95kg (28.5lbs) |
| Enclosure |
Bass reflex |
Bass reflex |
| Available Colors |
Satin Black |
Satin Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Yrs w/ Registration |
3 Yrs w/ Registration |
| Labor Warranty |
3 Yrs w/ Registration |
3 Yrs w/ Registration |