In this review, we will be comparing Windsor 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 Windsor 10 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 KLH Windsor 10 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 KLH Windsor 10and JBL Stage A120P have a single woofer setup however the KLH Windsor 10's woofer is 10-inch whereas the JBL Stage A120P features a 12-inch woofer.
Frequency Response
Windsor 10 and A120P has exactly the same frequency range of 32-150 Hz.
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 Windsor 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
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 KLH Windsor 10's and JBL Stage A120P's external dimensions. KLH Windsor 10 has external dimensions of 397.0 x 337.0 x 450.0mm ( 15-5/8 x 13-1/4 x 17-11/16inch) 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 56mm wider, 18mm taller and 25mm deeper than KLH Windsor 10.
Below you can see the front view size comparison of KLH Windsor 10 and JBL Stage A120P in scale.
Comparison image of KLH Windsor 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 Windsor 10 is approximately 1516.5cm2 / 235.1inch2 and base area of the JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2. The Windsor 10 requires 19% 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 Windsor 10 weighs 14.78kg / 32.5lbs and the JBL Stage A120P weighs 18.68kg / 41.1lbs. This makes the A120P 26% heavier than the Windsor 10.
Here is a comparison of how Windsor 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 Windsor 10?
Here are the items that are included inside the box of Windsor 10:
Powered subwooferGrille9-feet AC power cordManual
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
 Height |
397mm
vs
415mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1516cm2 (337x450mm)
vs
1866cm2 (393x475mm)
|
Takes less floor space |
 Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
| General |
KLH Windsor 10 |
JBL Stage A120P |
| Brand |
KLH |
JBL |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
150 watts |
250 watts |
| Frequency Response |
32-150 Hz |
32-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
150-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
n/a |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
12" |
| Woofer Composition |
Composite |
Polycellulose |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
397.0mm (15.6") |
415.0mm (16.3") |
| Width |
337.0mm (13.3") |
393.0mm (15.5") |
| Depth |
450.0mm (17.7") |
475.0mm (18.7") |
| Weight |
14.78kg (32.5lbs) |
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 |