In this review, we will be comparing Descend DN15 and A120P, two Powered Subwoofer speakers from Definitive Technology and JBL. 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 Definitive DN15 and JBL Stage A120P first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the Definitive DN15 and JBL Stage A120P compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both Definitive DN15and JBL Stage A120P have a single woofer setup however the Definitive DN15's woofer is 15-inch whereas the JBL Stage A120P features a 12-inch woofer.
Frequency Response
Descend DN15 has a frequency range of 20-150 Hz whereas A120P has a frequency range of 32-150 Hz. With a minimum frequency of 20Hz, the Descend DN15 can go significantly deeper on the low side and provide stronger bass compared to the A120P's min frequency of 32Hz.
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 Definitive DN15 has a Passive Radiator type cabinet. 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. On the other hand the JBL Stage A120P have Bass reflex type enclosure.
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 Definitive DN15's and JBL Stage A120P's external dimensions. Definitive DN15 has external dimensions of 634.0 x 596.0 x 640.0mm ( 24-15/16inch x 23-7/16inch x 25-3/16inch ) whereas JBL Stage A120P has external dimensions of 415.0 x 393.0 x 475.0mm ( 16-5/16 x 15-7/16 x 18-11/16inch) .
Definitive DN15 is clearly the larger of the two speakers. Its body is 203mm wider, 219mm taller and 165mm deeper than JBL Stage A120P.
Below you can see the front view size comparison of Definitive DN15 and JBL Stage A120P in scale.
Comparison image of Definitive DN15 and JBL Stage A120P 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 Definitive DN15 is approximately 3814.4cm2 / 591.2inch2 and base area of the JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2. The Descend DN15 requires 104% more surface area than the A120P 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 Definitive DN15 weighs 52.09kg / 114.6lbs and the JBL Stage A120P weighs 18.68kg / 41.1lbs. This makes the Descend DN15 179% heavier than the A120P.
Here is a comparison of how Descend DN15 and A120P's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of Definitive DN15?
Here are the items that are included inside the box of Descend DN15:
Powered subwoofer6-feet AC power cordRemote controlCR2032 3V battery (pre-installed in remote)Owners Manual
What's in the Box of JBL Stage A120P?
Here are the items that come with the A120P:
Powered subwooferGrille6-feet AC power cord4 Spike feetOwners ManualWarranty CardImportant Safety Instructions
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
| Low Frequency Response |
20 Hz
vs
32 Hz
|
Generates deeper bass |
 Passive Radiator |
2 x 15-inch
vs
None
|
Increases the bass performance |
 Height |
415mm
vs
634mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1866cm2
vs
3814cm2
|
Takes less floor space |
 Price per pair* |
300USD
vs
1799USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Definitive Technology Descend DN15 |
JBL Stage A120P |
| Brand |
Definitive Technology |
JBL |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
500 watts |
250 watts |
| Frequency Response |
20-150 Hz |
32-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
500-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
n/a |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Polypropylene |
Polycellulose |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
634.0mm (25") |
415.0mm (16.3") |
| Width |
596.0mm (23.5") |
393.0mm (15.5") |
| Depth |
640.0mm (25.2") |
475.0mm (18.7") |
| Weight |
52.09kg (114.6lbs) |
18.68kg (41.1lbs) |
| Enclosure |
Passive Radiator |
Bass reflex |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years |
1 Year |
| Labor Warranty |
3 Years |
1 Year |