In this review, we will be comparing Vestra W12 and SPL-120, two Powered Subwoofer speakers from Monitor Audio and 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 Monitor Audio Vestra W12 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.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Monitor Audio Vestra W12and Klipsch SPL-120 have the same driver set up: Both subwoofers have 1 x 12" drivers.
Frequency Response
Vestra W12 has a frequency range of 19-200 Hz whereas SPL-120 has a frequency range of 24-125 Hz. With a minimum frequency of 19Hz, the Vestra W12 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
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 Monitor Audio Vestra W12's and Klipsch SPL-120's external dimensions. Monitor Audio Vestra W12 has external dimensions of 384.2 x 371.5 x 442.9mm () 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-120 is clearly the larger of the two speakers. Its body is 3.5mm wider, 65.8mm taller and 97.1mm deeper than Monitor Audio Vestra W12.
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 Monitor Audio Vestra W12 is approximately 1645.4cm2 / 255.0inch2 and base area of the Klipsch SPL-120 is approximately 2025.0cm2 / 313.9inch2. The Vestra W12 requires 19% less surface area than the SPL-120 which gives it a small advantage 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 Monitor Audio Vestra W12 weighs 18.28kg / 40.2lbs and the Klipsch SPL-120 weighs 20.45kg / 45lbs. This makes the SPL-120 12% heavier than the Vestra W12.
Here is a comparison of how Vestra W12 and SPL-120's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Low Frequency Response |
19 Hz
vs
24 Hz
|
Generates deeper bass |
 High Frequency Response |
200 Hz
vs
125 Hz
|
Generates higher frequency |
 Height |
384mm
vs
450mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1645cm2
vs
2025cm2
|
Takes less floor space |
 Price per pair* |
499USD
vs
1199USD
|
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.
Klipsch SPL-120 needs about 23% more floor area. Klipsch SPL-120 stands 97mm further into the room. Klipsch SPL-120 is 66mm taller.
| General |
Monitor Audio Vestra W12 |
Klipsch SPL-120 |
| Brand |
Monitor Audio |
Klipsch |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
19-200 Hz |
24-125 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
500-watt RMS |
300-watt RMS |
| Watts Peak (Max) |
n/a |
600-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
12" |
12" |
| Woofer Composition |
|
Cerametallic |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
384.2mm (15.1") |
450.0mm (17.7") |
| Width |
371.5mm (14.6") |
375.0mm (14.8") |
| Depth |
442.9mm (17.4") |
540.0mm (21.3") |
| Weight |
18.28kg (40.2lbs) |
20.45kg (45lbs) |
| Enclosure |
|
Bass Reflex |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |
A sealed subwoofer against a ported 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 | A | Monitor Audio Vestra W12 goes deeper - 19Hz against 24Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | Monitor Audio Vestra W12 has the bigger amplifier - 500W against 300W RMS, about 2.2dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | evenly matched | Near-identical radiating area (12" against 12"). |
| Enclosure | depends | Monitor Audio Vestra W12 is sealed - a sealed box rolls off gently and is usually the easier one to integrate in a small or awkward room; Klipsch SPL-120 is ported - a ported box gives more output low down for its size, at the cost of a steeper roll-off below tuning. Neither is better in the abstract; ported tends to suit films and sealed tends to suit music, and both generalisations have exceptions. |
| Cabinet size | depends | Monitor Audio Vestra W12 is about 31% 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 | Monitor Audio Vestra W12 carries 5 years on parts against 2 years. A subwoofer amplifier works harder than anything else in the system, so this is not a throwaway line. |
| Price | B | Klipsch SPL-120 costs less - $499 against $1,199, about 58% less. |
A Monitor Audio Vestra W12 B Klipsch SPL-120
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: Monitor Audio Vestra W12 measures better, Klipsch SPL-120 costs about 58% 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, Klipsch SPL-120 will hit harder for the money; if it is mainly for music in a normal-sized room, Monitor Audio Vestra W12 is usually the easier one to make sound right. 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 $499 each, two Klipsch SPL-120 cost about $998 against $1,199 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.