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JBL Stage A120P Subwoofer Review

Main Features

  • 12" Polycellulose Woofer
  • 250 watts RMS Output
  • 32-150 Hz Frequency Response
  • Weight: 41.09 lbs / 18.68kg
  • Dimensions (H x W x D): 16-5/16" x 15-7/16" x 18-11/16"
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JBL Stage A120P Subwoofer Review
JBL Stage A120P JBL Stage A120P
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A120P is a Ported type Powered Subwoofer by JBL with a frequency range of 32-150 Hz. It features 1 x 12" Polycellulose Woofer, and powered by a 250 watts amplifier.

JBL Stage A120P  Lifestyle
JBL Stage A120P Lifestyle

A120P is a member of JBL's Stage Sub series of Powered subwoofers. Below you can see the main specs of these subwoofers as well as review and comparison links.

JBL Stage Sub Series Subwoofers
Model Frequency Woofer Amp Power Weight
JBL Stage A120P
32-150k Hz 12" 250 watts 18.68kg
JBL Stage A100P
Compare
35-150k Hz 10" 150 watts 13.66kg


**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.

Frequency Response

JBL Stage A120P has a Frequency response range of 32-150 Hz at ±3dB. Here we have a comparison of how A120P's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.

Low Frequency
Powered Subwoofers
JBL Stage A120P
Min
Average
Max
High Frequency
Subwoofer Speakers
JBL Stage A120P
Min
Average
Max

Among all subwoofers in our database with a max MSRP price of 300$, these are the 2 Powered Subwoofer models that can reach deeper bass levels than the JBL Stage A120P's 32Hz:

  • Sony SA-CS9 with Low Frequency of 28 Hz (Compare w/ A120P)
  • Jamo C 912 with Low Frequency of 29 Hz (Compare w/ A120P)

Low-Pass Crossover

JBL Stage A120P has a variable Low-pass filter (LFP) which lets you choose a frequency level between 50-150 Hz in order to block any frequencies above that point from reaching the amplifier.

JBL Stage A120P Back View
JBL Stage A120P Back View

Inputs and Outputs

  • PreampLevel Inputs: Mono-RCA/LFE
  • SpeakerLevel Inputs: No
  • SpeakerLevel Outputs: No
  • Wireless: No

JBL Stage A120P External Dimensions and Weight

JBL Stage A120P has external dimensions of (Height x Width x Depth) 16-5/16 x 15-7/16 x 18-11/16inch (415.0 x 393.0 x 475.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of JBL Stage A120P is approximately 1866.8cm2 / 289.4inch2.

To get a better perspective on the real life size of JBL Stage A120P, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

JBL Stage A120P Real Life Body Size Comparison
JBL Stage A120P Speaker Size Compared to a Compact Disc

Here we place the JBL Stage A120P virtually next to a standard width amplifier and turntable on a media center to get a better idea about the size.

JBL Stage A120P placed next to a Media Stand
JBL Stage A120P Subwoofer next to a Media Stand

Weight

The JBL Stage A120P weighs 18.68kg / 41.1lbs. Weight of a subwoofer is an important factor when you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. Here is a comparison of how A120P's weight compares with the average, max and min weights in its class.

Weight
All Subwoofer Speakers
JBL Stage A120P
Min
Average
Max
Weight
Subwoofer Speakers under $300
JBL Stage A120P
Min
Average
Max

Cabinet type and Materials

JBL Stage A120P has a Bass reflex type cabinet.

Port Position

JBL Stage A120P is a front-firing port speaker , which gives you more flexibility compared to rear firing speakers when you need to place it close against a wall or other surfaces.

Does the JBL Stage A120P come with a Grille?

A120P comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.

JBL Stage A120P  with Grille
JBL Stage A120P with Grille

What's in the Box of JBL Stage A120P?

Here are the items that are included inside the box of A120P:
  • Powered subwoofer
  • Grille
  • 6-feet AC power cord
  • 4 Spike feet
  • Owners Manual
  • Warranty Card
  • Important Safety Instructions
  • Recommended Accessories

    Here is a list of accessories that we think you may need for the JBL Stage A120P.

    • Vibration Isolators: IsoAcoustics isolators more affordable options too.
    • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.

    Warranty

    1 Year of parts warranty and 1 Year of labor warranty is generally provided by the manufacturer.

    JBL Stage A120P Alternatives in Powered Subwoofer Speakers
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    27-125k Hz 10" 200 watts 16-7/16 x 14-1/16 x 18-13/16inch"
    KEF KUBE 10b
    Compare
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    KEF KC62
    Compare
    11-200k Hz 6.5" 1000 watts 9-5/8inch x 10-1/8inch x 11-1/16inch "
    SVS PB-1000
    Compare
    19-270k Hz 10" 300 watts 18-7/8 x 15 x 20-15/16inch"
    Klipsch RP-1400SW
    Compare
    16-141k Hz 14" 500 watts 21-5/16inch x 20inch x 25-11/16inch "
    B&W ASW610
    Compare
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    Compare
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    Compare
    24-125k Hz 12" 300 watts 17-3/8 x 15-3/8 x 20-15/16inch"
    Frequently Asked Questions about JBL Stage A120P
    What is the External Dimensions of JBL Stage A120P
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