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JBL A120 vs JBL Stage A135C Comparison

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JBL A120

Passive Bookshelf | 60-40k Hz

JBL Stage A120
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JBL Stage A135C

Passive Center Channel | 75-40k Hz

JBL Stage A135C
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JBL A120 JBL A120
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JBL Stage A135C JBL Stage A135C
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JBL A120
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JBL Stage A135C
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JBL A120 vs JBL Stage A135C Speaker Comparison

In this review, we will be comparing two different type of speakers by JBL. JBL Stage A120 is a Bookshelf speaker whereas the A135C is a Center Channel speaker.

Let's have a brief look at the main features of JBL A120 and JBL Stage A135C first before getting into our more detailed comparison.

JBL A120 Key Specs

  • 2-way Design
  • 1" Hard-Dome Tweeter
  • 4.5" Polycellulose Woofer
  • 60-40k Hz Frequency Response
  • 86 dB Sensitivity
  • Impedance: 6ohms
  • Power Range:20-125watts
  • Weight:3.82kg
  • Dimensions (H x W x D): 286.0" x 6-3/4" x 7-7/16"( 286.0 x 172.0 x 189.0mm )

JBL Stage A135C Key Specs

  • 2-way Design
  • 1" dome with HDI (High Definition Imaging) waveguide technology Tweeter
  • 6 x 3" polycellulose Woofer
  • 75-40k Hz Frequency Response
  • 90 dB Sensitivity
  • Impedance: 6ohms
  • Power Range:20-150watts
  • Weight:7.46kg
  • Dimensions (H x W x D): 105.0" x 29-3/8" x 7-5/16"( 105.0 x 747.0 x 186.0mm )

A120 and A135C are members of JBL's Stage series of speakers. Below you can find the loudspeakers from this series.

JBL Stage Series History
Model Body Frequency SensitivityImpedance Woofer
JBL A130
  
Bookshelf 55-40k Hz 86 dB6Ω 1 x 5.25"
JBL A120
Bookshelf 60-40k Hz 86 dB6Ω 1 x 4.5"
JBL Stage A190
  
Floor-standing 36-40k Hz 91 dB6Ω 2 x 8"
JBL Stage A180
  
Floor-standing 40-40k Hz 90 dB6Ω 2 x 6.5"
JBL Stage A135C
Center Channel 75-40k Hz 90 dB6Ω 6 x 3"
JBL Stage A170
  
Floor-standing 44-40k Hz 89 dB6Ω 2 x 5.25"
JBL Stage A125C
  
Center Channel 75-40k Hz 88 dB6Ω 2 x 5.24"
JBL Stage 280W
  
In-wall 42-25kHz 90 dB8Ω 1 x 8"
JBL Stage 260W
  
In-wall 50-25kHz 87 dB8Ω 1 x 6.5"
JBL Stage 250WL
  
In-wall 52-25kHz 90 dB8Ω 2 x 5.25"

What size room are the JBL A120 and JBL Stage A135C speakers good for?

The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:

Listening Environment* JBL A120 JBL Stage A135C
Near-field Poor Poor
Small Room Average Average
Mid-size Room Good Good
Large Room Average Average
Very Large Room Poor Poor

(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2. Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)

In the following sections, we will get into more detail in order to better understand how the JBL A120 and JBL Stage A135C compare and hopefully end up with enough arguments to decide which one of these loudspeakers 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

Both A120 and A135C are 2-way speakers.

Driver JBL A120 JBL Stage A135C
Driver Setup 2-way 2-way
Tweeter 1-inch 1-inch
Midrange - -
Woofer 1 x 4.5-inch 6 x 3-inch

A120 features a 1" aluminum Hard-Dome Tweeter and 1 x 4.5" Polycellulose Woofer . On the other hand, the A135C features a 1" aluminum dome with HDI (High Definition Imaging) waveguide technology Tweeter and 6 x 3" polycellulose Woofer .

Frequency Response

A120 has a frequency range of 60-40k Hz whereas A135C has a frequency range of 75-40k Hz. With a minimum frequency of 60Hz, the A120 can go significantly deeper on the low side and provide stronger bass compared to the A135C's min frequency of 75Hz.

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 Bookshelf class in our database.

Low Frequency

Bookshelf Speakers

A120
A135C
Min
Average
Max
High Frequency

Bookshelf Speakers

JBL A120
JBL Stage A135C
Min
Average
Max

None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.

Impedance and Sensitivity

A120 and A135C have the same Impedance of 6 ohms but where they differ is the sensitivity levels. A120 sensitivity is rated at 86 dB and the A135C's is at 90 dB. This 4 dB difference makes the JBL Stage A135C a more sensitive speaker compared to JBL A120, hence will play louder with the same amount of watts.

Sensitivity

Bookshelf Speakers

A120
A135C
Min
Average
Max

Power Range

Power range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.

A120 can handle a max power of 150 watts RMS from the amp the whereas A120 has a max power handling value of 125 watts RMS , 25 watts less than the A135C.

Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters such as Impedance, sensitivity and system efficiencies.

Input Type and Bi-Amping / Bi-Wiring

A120 features 5-way post type posts and A135C has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.

JBL A120 Terminals
JBL A120's 5-way post terminals

Cabinet Type and Port Position

A120 has a rear firing port whereas A135C has a side firing ports.

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 A120's and JBL Stage A135C's external dimensions. JBL A120 has external dimensions of 286.0 x 172.0 x 189.0mm ( 11-1/4 x 6-3/4 x 7-7/16inch) whereas JBL Stage A135C has external dimensions of 105.0 x 747.0 x 186.0mm ( 4-1/8 x 29-3/8 x 7-5/16inch) .

JBL Stage A135C is 181mm shorter and 3mm less deeper than JBL A120 but it is also 575mm wider.

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 A120 is approximately 325.1cm2 / 50.4inch2 and base area of the JBL Stage A135C is approximately 1389.4cm2 / 215.4inch2. The A120 requires 77% less surface area than the A135C which gives it a small advantage on placement in tight spaces.

What's in the Box of JBL A120?

Here are the items that are included inside the box of A120:
  • 2 Bookshelf loudspeakers
  • 2 Grilles
  • 2 Foam plugs
  • 4 Brackets
  • 8 Rubber feet
  • 8 Screws (M6 x 8mm)
  • Owner-feets Manual
  • Warranty Card
  • What's in the Box of JBL Stage A135C?

    Here are the items that come with the A135C:
  • Center-channel loudspeaker
  • Grille
  • 4 Leveling feet
  • 4 Rubber feet
  • Owners Manual
  • Warranty Card

  • Reasons to choose JBL Stage A120 over JBL Stage A135C
    Woofer Size 4.5 inches vs 3 inches Larger woofer
    Low Frequency Response 60 Hz vs 75 Hz Generates deeper bass
    Mounting Bracket Yes vs No Allows mounting on walls
    Base Surface Area 325cm2 vs 1389cm2 Takes less floor space
    Price per pair* 250USD vs 300USD costs less (*prices may change depending on the seller, location and time)

    Reasons to choose JBL Stage A135C over JBL Stage A120

    Max Input Power 150 watts vs 125 watts Handle more power from your amplifier
    Sensitivity 90 dB vs 86 dB Play louder with same amount of amplification power
    Number of Woofers 6 vs 1 More woofers
    Height 105mm vs 286mm Easier to fit in smaller spaces
    JBL A120 vs JBL Stage A135C Specs Table
    Detailed comparison of specifications
    General JBL Stage A120 JBL Stage A135C
    Brand JBL JBL
    Speaker Type Bookshelf speakers Low-profile center channel speaker
    Power Range 20-125 watts 20-150 watts
    Sensitivity 86 dB 90 dB
    Impedance 6 ohms 6 ohms
    Frequency Response 60-40k Hz 75-40k Hz
    Drivers
    Woofer Quantity 1 6
    Woofer Size 4.5" 3"
    Woofer Composition Polycellulose polycellulose
    Woofer Surround Material Rubber n/a
    Tweeter Size 1" 1"
    Tweeter Type Hard-Dome dome with HDI (High Definition Imaging) waveguide technology
    Aimable Tweeter No No
    Midrange Driver No N/A"
    Firing Direction rear side
    Physical Specs
    Height 286.0mm (11.3") 105.0mm (4.1")
    Width 172.0mm (6.8") 747.0mm (29.4")
    Depth 189.0mm (7.4") 186.0mm (7.3")
    Weight 3.82kg (8.4lbs) 7.46kg (16.4lbs)
    Enclosure Bass Reflex Bass Reflex
    Finish MDF, Vinyl n/a
    Available Colors Black Black
    Mounting Bracket Keyholes w/ bracket No
    Recommended Stand Height 26-28" n/a
    Grille Yes Yes
    Moisture Resistancy No No
    Connections
    Biamp Inputs No No
    Other
    Parts Warranty 5 Years 5 Years
    Labor Warranty 5 Years 5 Years

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