In this review, we will be comparing SPL-150 and SPL-120, two Powered Subwoofer speakers by Klipsch. 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 Klipsch SPL-120 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.
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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 Klipsch SPL-120 have a single woofer setup however the Klipsch SPL-150's woofer is 15-inch whereas the Klipsch SPL-120 features a 12-inch woofer.
Frequency Response
SPL-150 has a frequency range of 18-125 Hz whereas SPL-120 has a frequency range of 24-125 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 SPL-120's min frequency of 24Hz.
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 Klipsch SPL-150 and Klipsch SPL-120 have Bass Reflex type cabinets. 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.
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 Klipsch SPL-150's and Klipsch SPL-120'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 Klipsch SPL-120 has external dimensions of 450.0 x 375.0 x 540.0mm (17-11/16 x 14-3/4 x 21-1/4inch).
Klipsch SPL-150 is clearly the larger of the two speakers. Its body is 121mm wider, 97mm taller and 64mm deeper than Klipsch SPL-120.
Below you can see the front view size comparison of Klipsch SPL-150 and Klipsch SPL-120 in scale.
Comparison image of Klipsch SPL-150 and Klipsch SPL-120 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 Klipsch SPL-120 is approximately 2025.0cm2 / 313.9inch2. The SPL-150 requires 48% more surface area than the SPL-120 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 Klipsch SPL-120 weighs 20.45kg / 45lbs. This makes the SPL-150 68% heavier than the SPL-120.
Here is a comparison of how SPL-150 and SPL-120'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 sub
- Grille
- 6.5-feet AC power cord
- User Manual
- Important Safety Instructions
- Warranty Information
What's in the Box of Klipsch SPL-120?
Here are the items that come with the SPL-120:
- Powered sub
- Grille
- 6.5-feet AC power cord
- User Manual
- Important Safety Instructions
- Warranty Information
 Woofer Size |
15 inches
vs
12 inches
|
Larger woofer |
| Low Frequency Response |
18 Hz
vs
24 Hz
|
Generates deeper bass |
 Height |
450mm
vs
547mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
2025cm2
vs
2995cm2
|
Takes less floor space |
 Price per pair* |
499USD
vs
1399USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Klipsch SPL-150 |
Klipsch SPL-120 |
| Brand |
Klipsch |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
400 watts |
300 watts |
| Frequency Response |
18-125 Hz |
24-125 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
400-watt RMS |
300-watt RMS |
| Watts Peak (Max) |
n/a |
600-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
12" |
| Woofer Composition |
Cerametallic |
Cerametallic |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
547.0mm (21.5") |
450.0mm (17.7") |
| Width |
496.0mm (19.5") |
375.0mm (14.8") |
| Depth |
604.0mm (23.8") |
540.0mm (21.3") |
| Weight |
34.27kg (75.4lbs) |
20.45kg (45lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
2 Years |
| Labor Warranty |
2 Years |
2 Years |