In this review, we will be comparing two different type of speakers by JBL. JBL Stage 240B is a Bookshelf speaker whereas the A135C is a Center Channel speaker.
Let's have a brief look at the main features
of JBL Stage 240B and JBL Stage A135C first before getting into our more
detailed comparison.
JBL Stage 240B Key Specs
- 2-way Design
- 1" Hard-dome Tweeter
- 4.5" Polycellulose Woofer
- 65-25k Hz Frequency Response
- 85 dB Sensitivity
- Impedance: 6ohms
- Power Range:25-75watts
- Weight:4.59kg
- Dimensions (H x W x D): 274.0" x 6-15/16" x 8-1/2"( 274.0 x 177.0 x 216.0mm )
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 )
What size room are the JBL Stage 240B 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 Stage 240B |
JBL Stage A135C |
| Near-field |
Average |
Poor |
| Small Room |
Good |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Average |
| Very Large Room |
Bad |
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 Stage 240B 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.
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Drivers
Both Stage 240B and A135C are 2-way speakers.
| Driver |
JBL Stage 240B |
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
|
Stage 240B features a 1" 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
Stage 240B has a frequency range of 65-25k Hz whereas A135C has a frequency range of 75-40k Hz. With a minimum frequency of 65Hz, the Stage 240B 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
High Frequency
Bookshelf Speakers
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
Stage 240B and A135C have the same Impedance of 6 ohms but where they differ is the sensitivity levels. Stage 240B sensitivity is rated at 85 dB and the A135C's is at 90 dB. This 5 dB difference makes the JBL Stage A135C a more sensitive speaker compared to JBL Stage 240B, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf Speakers
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.
Stage 240B can handle a max power of 150 watts RMS from the amp the whereas Stage 240B has a max power handling value of 75 watts RMS , 75 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
Stage 240B features 5-way post type posts and A135C has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Stage 240B 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 Stage 240B's and JBL Stage A135C's external dimensions. JBL Stage 240B has external dimensions of 274.0 x 177.0 x 216.0mm ( 10-3/4inch x 6-15/16inch x 8-1/2inch ) 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 169mm shorter and 30mm less deeper than JBL Stage 240B but it is also 570mm 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 Stage 240B is approximately 382.3cm2 / 59.3inch2 and base area of the JBL Stage A135C is approximately 1389.4cm2 / 215.4inch2. The Stage 240B requires 72% less surface area than the A135C which gives it a small advantage on placement in tight spaces.
What's in the Box of JBL Stage 240B?
Here are the items that are included inside the box of Stage 240B:
2 Bookshelf loudspeakers 2 Grilles 2 Foam plugs 2 Wall-brackets 4 Mounting screws 8 Self-adhesive rubber pads Quick Start Guide Important Safety Instructions
What's in the Box of JBL Stage A135C?
Here are the items that come with the A135C:
Center-channel loudspeakerGrille4 Leveling feet4 Rubber feetOwners ManualWarranty Card
Woofer Size 
Base Surface Area 
Price per pair* 
Max Input Power 
Sensitivity 
High Frequency Response 
Height