In this review, we will be comparing A120P and C 912, two Powered Subwoofer speakers from JBL and Jamo. 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 JBL Stage A120P and Jamo C 912 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the JBL Stage A120P and Jamo C 912 compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.JBL Stage A120Pand Jamo C 912 have the same driver set up: Both subwoofers have 1 x 12" drivers.
Frequency Response
A120P has a frequency range of 32-150 Hz whereas C 912 has a frequency range of 29-125 Hz. With a minimum frequency of 29Hz, the C 912 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 JBL Stage A120P has a Bass reflex type cabinet. On the other hand the Jamo C 912 have Bass Reflex type enclosure. 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
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 JBL Stage A120P's and Jamo C 912's external dimensions. 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) whereas Jamo C 912 has external dimensions of 461.0 x 358.0 x 507.0mm ( 18-1/8 x 14-1/16 x 19-15/16inch) .
JBL Stage A120P is 46mm shorter and 32mm less deeper than Jamo C 912 but it is also 35mm wider.
Below you can see the front view size comparison of JBL Stage A120P and Jamo C 912 in scale.
Comparison image of JBL Stage A120P and Jamo C 912 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 JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2 and base area of the Jamo C 912 is approximately 1815.1cm2 / 281.3inch2. The A120P requires 3% more surface area than the C 912 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 JBL Stage A120P weighs 18.68kg / 41.1lbs and the Jamo C 912 weighs 18.98kg / 41.8lbs. This makes the C 912 2% heavier than the A120P.
Here is a comparison of how A120P and C 912's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of JBL Stage A120P?
Here are the items that are included inside the box of A120P:
Powered subwooferGrille6-feet AC power cord4 Spike feetOwners ManualWarranty CardImportant Safety Instructions
What's in the Box of Jamo C 912?
Here are the items that come with the C 912:
Powered subwooferGrille6-feet AC power cordUser ManualImportant Safety InstructionsWarranty Information
 High Frequency Response |
150k Hz
vs
125k Hz
|
Generates higher frequency |
 Height |
415mm
vs
461mm
|
Easier to fit in smaller spaces |
 Low Frequency Response |
29 Hz
vs
32 Hz
|
Generates deeper bass |
 Base Surface Area |
1815cm2
vs
1866cm2
|
Takes less floor space |
 Price per pair* |
229USD
vs
300USD
|
costs less (*prices may change depending on the seller, location and time) |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
| General |
JBL Stage A120P |
Jamo C 912 |
| Brand |
JBL |
Jamo |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
250 watts |
200 watts |
| Frequency Response |
32-150 Hz |
29-125 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
250-watt RMS |
200-watt RMS |
| Watts Peak (Max) |
500-watt RMS |
400-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
12" |
12" |
| Woofer Composition |
Polycellulose |
IMG |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
415.0mm (16.3") |
461.0mm (18.1") |
| Width |
393.0mm (15.5") |
358.0mm (14.1") |
| Depth |
475.0mm (18.7") |
507.0mm (20") |
| Weight |
18.68kg (41.1lbs) |
18.98kg (41.8lbs) |
| Enclosure |
Bass reflex |
Bass Reflex |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
1 Year |
2 Years |
| Labor Warranty |
1 Year |
2 Years |