In this review, we will be comparing Defiance X15 and A120P, two Powered Subwoofer speakers from Paradigm 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 Paradigm Defiance X15 and JBL Stage A120P 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 Paradigm Defiance X15and JBL Stage A120P have a single woofer setup however the Paradigm Defiance X15's woofer is 15-inch whereas the JBL Stage A120P features a 12-inch woofer.
Frequency Response
Defiance X15 has a frequency range of 18-230 Hz whereas A120P has a frequency range of 32-150 Hz. With a minimum frequency of 18Hz, the Defiance X15 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 Paradigm Defiance X15 has a Bass Reflex type cabinet. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs. On the other hand the JBL Stage A120P have Bass reflex type enclosure.
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 Paradigm Defiance X15's and JBL Stage A120P's external dimensions. Paradigm Defiance X15 has external dimensions of 626.0 x 589.0 x 661.0mm (24-5/8inch x 23-3/16inch x 26inch) 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).
Paradigm Defiance X15 is clearly the larger of the two speakers. Its body is 196mm wider, 211mm taller and 186mm deeper than JBL Stage A120P.
Below you can see the front view size comparison of Paradigm Defiance X15 and JBL Stage A120P in scale.
Comparison image of Paradigm Defiance X15 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 Paradigm Defiance X15 is approximately 3893.3cm2 / 603.5inch2 and base area of the JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2. The Defiance X15 requires 109% 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 Paradigm Defiance X15 weighs 41.82kg / 92lbs and the JBL Stage A120P weighs 18.68kg / 41.1lbs. This makes the Defiance X15 124% heavier than the A120P.
Here is a comparison of how Defiance X15 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 Paradigm Defiance X15?
Here are the items that are included inside the box of Defiance X15:
- Powered subwoofer
- Grille
- 6-feetAC power cord
- ARC microphone
- 12
What's in the Box of JBL Stage A120P?
Here are the items that come with the A120P:
- Powered subwoofer
- Grille
- 6-feet AC power cord
- 4 Spike feet
- Owners Manual
- Warranty Card
- Important Safety Instructions
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
| Low Frequency Response |
18 Hz
vs
32 Hz
|
Generates deeper bass |
 High Frequency Response |
230 Hz
vs
150 Hz
|
Generates higher frequency |
 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 |
415mm
vs
626mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1866cm2
vs
3893cm2
|
Takes less floor space |
 Price per pair* |
300USD
vs
1999USD
|
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.
Paradigm Defiance X15 needs about 109% more floor area. Paradigm Defiance X15 stands 186mm further into the room. Paradigm Defiance X15 is 211mm taller.
| General |
Paradigm Defiance X15 |
JBL Stage A120P |
| Brand |
Paradigm |
JBL |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
90 watts |
250 watts |
| Frequency Response |
18-230 Hz |
32-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
90-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
n/a |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Carbon-loaded polypropylene |
Polycellulose |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
626.0mm (24.6") |
415.0mm (16.3") |
| Width |
589.0mm (23.2") |
393.0mm (15.5") |
| Depth |
661.0mm (26") |
475.0mm (18.7") |
| Weight |
41.82kg (92lbs) |
18.68kg (41.1lbs) |
| Enclosure |
Bass Reflex |
Bass reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years |
1 Year |
| Labor Warranty |
3 Years |
1 Year |
Different price classes - Paradigm Defiance X15 costs roughly 6.7x what JBL Stage A120P does. Before paying it, read the note below about two smaller subwoofers.
| Area | Better | Why |
|---|
| Bass depth | A | Paradigm Defiance X15 goes deeper - 18Hz against 32Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | B | JBL Stage A120P has the bigger amplifier - 250W against 90W RMS, about 4.4dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | Paradigm Defiance X15 moves more air: 15" against 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 | evenly matched | Both are ported designs, so they roll off in much the same way. |
| Speaker-level inputs | A | Paradigm Defiance X15 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. |
| Wireless option | depends | Only Paradigm Defiance X15 offers a wireless link (as a paid option). It decides where the sub can go if you cannot run a cable, and is worth nothing if you can. |
| Cabinet size | depends | JBL Stage A120P is about 68% 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. |
| Warranty | A | Paradigm Defiance X15 carries 3 years on parts against 1 years. A subwoofer amplifier works harder than anything else in the system, so this is not a throwaway line. |
| Price | B | JBL Stage A120P costs less - $300 against $1,999, about 85% less. |
A Paradigm Defiance X15 B JBL Stage A120P
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: Paradigm Defiance X15 measures better, JBL Stage A120P costs about 85% less. In a normal room, placement will make a bigger difference than the gap between these two. Check your amplifier first: if it has no subwoofer or preamp output, Paradigm Defiance X15 is the only one of these two you can connect at all. 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 $300 each, two JBL Stage A120P cost about $600 against $1,999 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.