In this review, we will be comparing Stratton 10 and A120P, two Powered Subwoofer speakers from KLH 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 KLH Stratton 10 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 KLH Stratton 10and JBL Stage A120P have a single woofer setup however the KLH Stratton 10's woofer is 10-inch whereas the JBL Stage A120P features a 12-inch woofer.
Frequency Response
Stratton 10 has a frequency range of 29-150 Hz whereas A120P has a frequency range of 32-150 Hz. With a minimum frequency of 29Hz, the Stratton 10 can go slightly deeper then 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 KLH Stratton 10 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 KLH Stratton 10's and JBL Stage A120P's external dimensions. KLH Stratton 10 has external dimensions of 389.0 x 326.0 x 443.0mm (15-5/16inch x 12-13/16inch x 17-7/16inch) 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).
JBL Stage A120P is clearly the larger of the two speakers. Its body is 67mm wider, 26mm taller and 32mm deeper than KLH Stratton 10.
Below you can see the front view size comparison of KLH Stratton 10 and JBL Stage A120P in scale.
Comparison image of KLH Stratton 10 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 KLH Stratton 10 is approximately 1444.2cm2 / 223.9inch2 and base area of the JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2. The Stratton 10 requires 23% less surface area than the A120P 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 KLH Stratton 10 weighs 14.55kg / 32lbs and the JBL Stage A120P weighs 18.68kg / 41.1lbs. This makes the A120P 28% heavier than the Stratton 10.
Here is a comparison of how Stratton 10 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 KLH Stratton 10?
Here are the items that are included inside the box of Stratton 10:
- Powered subwoofer
- 6-feet AC power cord
- Grille
- Manual
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
 Low Frequency Response |
29 Hz
vs
32 Hz
|
Generates deeper bass |
 Height |
389mm
vs
415mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1444cm2
vs
1866cm2
|
Takes less floor space |
| Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
 Price per pair* |
300USD
vs
449USD
|
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.
JBL Stage A120P needs about 29% more floor area. JBL Stage A120P stands 32mm further into the room. JBL Stage A120P is 26mm taller.
| General |
KLH Stratton 10 |
JBL Stage A120P |
| Brand |
KLH |
JBL |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
200 watts |
250 watts |
| Frequency Response |
29-150 Hz |
32-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
200-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
n/a |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
12" |
| Woofer Composition |
Paper/Kevlar/Fiberglass |
Polycellulose |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
389.0mm (15.3") |
415.0mm (16.3") |
| Width |
326.0mm (12.8") |
393.0mm (15.5") |
| Depth |
443.0mm (17.4") |
475.0mm (18.7") |
| Weight |
14.55kg (32lbs) |
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 |
No single best subwoofer here. Your room, where the box can physically go, and whether this is mainly for films or mainly for music will settle it long before the specs do.
| Area | Better | Why |
|---|
| Bass depth | A | KLH Stratton 10 goes deeper - 29Hz against 32Hz. A real difference, though most music has little content below 32Hz. |
| Amplifier power | B | JBL Stage A120P has the bigger amplifier - 250W against 200W RMS, about 1dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | B | JBL Stage A120P moves more air: 12" against 10" is 1.44x the cone area, not the 1.2x 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. |
| Cabinet size | depends | KLH Stratton 10 is about 27% 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 | KLH Stratton 10 carries 2 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 $449, about 33% less. |
A KLH Stratton 10 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?
Neither runs away with it - they trade advantages. Let your room size and where the box can actually stand settle it.
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.