In this review, we will be comparing SPL-150 and A120P, two Powered Subwoofer speakers from Klipsch 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 Klipsch SPL-150 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 Klipsch SPL-150 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 Klipsch SPL-150and JBL Stage A120P have a single woofer setup however the Klipsch SPL-150's woofer is 15-inch whereas the JBL Stage A120P features a 12-inch woofer.
Frequency Response
SPL-150 has a frequency range of 18-125 Hz whereas A120P has a frequency range of 32-150 Hz. With a minimum frequency of 18Hz, the SPL-150 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 Klipsch SPL-150 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
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 Klipsch SPL-150's and JBL Stage A120P's external dimensions. Klipsch SPL-150 has external dimensions of 547.0 x 496.0 x 604.0mm ( 21-1/2 x 19-1/2 x 23-3/4inch) 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) .
Klipsch SPL-150 is clearly the larger of the two speakers. Its body is 103mm wider, 132mm taller and 129mm deeper than JBL Stage A120P.
Below you can see the front view size comparison of Klipsch SPL-150 and JBL Stage A120P in scale.
Comparison image of Klipsch SPL-150 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 Klipsch SPL-150 is approximately 2995.8cm2 / 464.3inch2 and base area of the JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2. The SPL-150 requires 60% 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 Klipsch SPL-150 weighs 34.27kg / 75.4lbs and the JBL Stage A120P weighs 18.68kg / 41.1lbs. This makes the SPL-150 83% heavier than the A120P.
Here is a comparison of how SPL-150 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 Klipsch SPL-150?
Here are the items that are included inside the box of SPL-150:
Powered subGrille6.5-feet AC power cordUser ManualImportant Safety InstructionsWarranty Information
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 |
18 Hz
vs
32 Hz
|
Generates deeper bass |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
 High Frequency Response |
150k Hz
vs
125k Hz
|
Generates higher frequency |
 Height |
415mm
vs
547mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1866cm2 (393x475mm)
vs
2995cm2 (496x604mm)
|
Takes less floor space |
 Price per pair* |
300USD
vs
1399USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Klipsch SPL-150 |
JBL Stage A120P |
| Brand |
Klipsch |
JBL |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
400 watts |
250 watts |
| Frequency Response |
18-125 Hz |
32-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
400-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
n/a |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Cerametallic |
Polycellulose |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
547.0mm (21.5") |
415.0mm (16.3") |
| Width |
496.0mm (19.5") |
393.0mm (15.5") |
| Depth |
604.0mm (23.8") |
475.0mm (18.7") |
| Weight |
34.27kg (75.4lbs) |
18.68kg (41.1lbs) |
| Enclosure |
Bass Reflex |
Bass reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
1 Year |
| Labor Warranty |
2 Years |
1 Year |