In this review, we will be comparing Depth 215 and SuperSub XXL, two Powered Subwoofer speakers from MartinLogan and GoldenEar. 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 Depth 215 and GoldenEar SuperSub XXL 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.Both MartinLogan Depth 215and GoldenEar SuperSub XXL have a double woofer setup however the MartinLogan Depth 215's woofer is 15-inch whereas the GoldenEar SuperSub XXL features a 12-inch woofer.
Frequency Response
Depth 215 has a frequency range of 18-120 Hz whereas SuperSub XXL has a frequency range of 10-250 Hz. With a minimum frequency of 10Hz, the SuperSub XXL can go significantly deeper on the low side and provide stronger bass compared to the Depth 215's min frequency of 18Hz.
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
The MartinLogan Depth 215 has a Acoustic Suspension type cabinet. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs. On the other hand the GoldenEar SuperSub XXL have Passive Radiator type enclosure. Passive Radiator type subwoofers sports a non-powered cone that moves in response to the main woofer to move air out in order to generate stronger bass in a smaller body compared to ported or sealed designs.
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 Depth 215's and GoldenEar SuperSub XXL's external dimensions. MartinLogan Depth 215 has external dimensions of 572.0 x 580.0 x 595.0mm (22-1/2 x 22-13/16 x 23-7/16inch) whereas GoldenEar SuperSub XXL has external dimensions of 447.0 x 485.0 x 434.0mm (17-9/16inch x 19-1/16inch x 17-1/16inch).
MartinLogan Depth 215 is clearly the larger of the two speakers. Its body is 95mm wider, 125mm taller and 161mm deeper than GoldenEar SuperSub XXL.
Size, drawn to scale
Both speakers 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 surface and pushed back to the same wall, so the deeper one visibly sticks out further.
MartinLogan Depth 215 needs about 64% more floor or shelf area. MartinLogan Depth 215 is 161mm deeper, so it stands that much further out from the wall. MartinLogan Depth 215 is 125mm taller.
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 Depth 215 is approximately 3451.0cm2 / 534.9inch2 and base area of the GoldenEar SuperSub XXL is approximately 2104.9cm2 / 326.3inch2. The Depth 215 requires 64% more surface area than the SuperSub XXL 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 Depth 215 weighs 78.50kg / 172.7lbs and the GoldenEar SuperSub XXL weighs 37.27kg / 82lbs. This makes the Depth 215 111% heavier than the SuperSub XXL.
Here is a comparison of how Depth 215 and SuperSub XXL's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
| Low Frequency Response |
10 Hz
vs
18 Hz
|
Generates deeper bass |
 High Frequency Response |
250 Hz
vs
120 Hz
|
Generates higher frequency |
 Passive Radiator |
two 13-inch x 15-inch
vs
None
|
Increases the bass performance |
 Height |
447mm
vs
572mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
2104cm2
vs
3451cm2
|
Takes less floor space |
 Price per pair* |
2499USD
vs
7000USD
|
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.
MartinLogan Depth 215 needs about 64% more floor area. MartinLogan Depth 215 stands 161mm further into the room. MartinLogan Depth 215 is 125mm taller.
| General |
MartinLogan Depth 215 |
GoldenEar SuperSub XXL |
| Brand |
MartinLogan |
GoldenEar |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
2200 watts |
1600 watts |
| Frequency Response |
18-120 Hz |
10-250 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
2200-watt RMS |
1600-watt RMS |
| Watts Peak (Max) |
4400-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Aluminium |
Fiber |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
35–120Hz |
n/a |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
572.0mm (22.5") |
447.0mm (17.6") |
| Width |
580.0mm (22.8") |
485.0mm (19.1") |
| Depth |
595.0mm (23.4") |
434.0mm (17.1") |
| Weight |
78.50kg (172.7lbs) |
37.27kg (82lbs) |
| Enclosure |
Acoustic Suspension |
Passive Radiator |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
|
3 Years |
| Labor Warranty |
|
3 Years |
A sealed subwoofer against a passive radiator one. That is the most consequential line on this page: it decides how the bass rolls off, how it behaves in a small room, and how much output you get for the size of the box.
| Area | Better | Why |
|---|
| Bass depth | B | GoldenEar SuperSub XXL goes deeper - 10Hz against 18Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | MartinLogan Depth 215 has the bigger amplifier - 2200W against 1600W RMS, about 1.4dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | MartinLogan Depth 215 moves more air: 2 x 15" against 2 x 12" is 1.56x the cone area, not the 1.25x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | depends | MartinLogan Depth 215 is sealed - a sealed box rolls off gently and is usually the easier one to integrate in a small or awkward room; GoldenEar SuperSub XXL is passive radiator - a passive radiator behaves like a port without the pipe noise, and suits a slim cabinet. Neither is better in the abstract; ported tends to suit films and sealed tends to suit music, and both generalisations have exceptions. |
| Speaker-level inputs | A | MartinLogan Depth 215 takes a speaker-level connection as well as line level. That is what lets it work with an integrated amplifier or a vintage receiver that has no subwoofer output at all. |
| Phase control | A | MartinLogan Depth 215 has a phase control. Without one, the only way to fix a cancellation at the crossover is to move the box. |
| Driver placement | depends | MartinLogan Depth 215 fires front and GoldenEar SuperSub XXL fires side. A down-firing driver is more forgiving of a grille-less look and of a hard floor; a front-firing one is the safer choice on a thick carpet or a suspended timber floor. |
| Cabinet size | depends | GoldenEar SuperSub XXL is about 52% smaller by volume. In a subwoofer that is a real trade rather than a preference: box volume is how you get output low down without a bigger amplifier. |
| Price | B | GoldenEar SuperSub XXL costs less - $2,499 against $7,000, about 64% less. |
A MartinLogan Depth 215 B GoldenEar SuperSub XXL
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?
The usual trade-off: MartinLogan Depth 215 measures better, GoldenEar SuperSub XXL costs about 64% less. In a normal room, placement will make a bigger difference than the gap between these two. Films or music? If this is mainly a home cinema, GoldenEar SuperSub XXL will hit harder for the money; if it is mainly for music in a normal-sized room, MartinLogan Depth 215 is usually the easier one to make sound right. Check your amplifier first: if it has no subwoofer or preamp output, MartinLogan Depth 215 is the only one of these two you can connect at all.
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.