In this review, we will be comparing L82 Classic and LS50, two Passive Bookshelf speakers from JBL and KEF. Let's have a brief look at the main features
of JBL L82 Classic and KEF LS50 first before getting into our more
detailed comparison.
What size room are the JBL L82 Classic and KEF LS50 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:
In the following sections, we will get into more detail in order to better understand how the JBL L82 Classic and KEF LS50 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 L82 Classic and LS50 are 2-way speakers.
| Driver |
JBL L82 Classic |
KEF LS50 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 8-inch
|
1 x 5.25-inch
|
L82 Classic features a 1" Titanium Dome Tweeter and 1 x 8" Pulp Woofer with a Crossover frequency at 1700Hz. On the other hand, the LS50 features a 1" Aluminum Vented dome Tweeter and 1 x 5.25" Magnesium/aluminum alloy Woofer with a Crossover frequency at 2200Hz.
Frequency Response
L82 Classic has a frequency range of 44-40k Hz whereas LS50 has a frequency range of 79-28k Hz. With a minimum frequency of 44Hz, the L82 Classic can go significantly deeper on the low side and provide stronger bass compared to the LS50's min frequency of 79Hz.
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
L82 Classic and LS50 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. L82 Classic sensitivity is rated at 88 dB and the LS50's is at 85 dB. This 3 dB difference makes the JBL L82 Classic a more sensitive speaker compared to KEF LS50, 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.
L82 Classic can handle a max power of 125 watts RMS from the amp the whereas LS50 has a max power handling value of 100 watts RMS, 25 watts less than the L82 Classic.
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
L82 Classic features Post type posts and LS50 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
JBL L82 Classic's Five-way gold-plated binding posts terminals
KEF LS50's Post terminals
Cabinet Type and Port Position
L82 Classic has a front firing port whereas LS50 has a rear firing ports. JBL L82 Classic's front-firing port gives more flexibility in placement in regards to proximity to walls compared to KEF LS50 with its rear-firing port.
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 L82 Classic's and KEF LS50's external dimensions. JBL L82 Classic has external dimensions of 472.8 x 281.0 x 315.5mm ( 18.6 x 11.0 x 12.4inch) whereas KEF LS50 has external dimensions of 302.0 x 200.0 x 278.0mm ( 11.8 x 7.8 x 10.9inch) .
JBL L82 Classic is clearly the larger of the two speakers. Its body is 81mm wider, 170.8mm taller and 37.5mm deeper than KEF LS50.
Below you can see the front view size comparison of JBL L82 Classic and KEF LS50 in scale.
Comparison image of JBL L82 Classic and KEF LS50 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 L82 Classic is approximately 886.6cm2 / 137.4inch2 and base area of the KEF LS50 is approximately 556.0cm2 / 86.2inch2. The L82 Classic requires 59% more surface area than the LS50 which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The JBL L82 Classic weighs 12.80kg / 28.2lbs and the KEF LS50 weighs 7.20kg / 15.8lbs. This makes the L82 Classic 78% heavier than the LS50.
Here is a comparison of how L82 Classic and LS50's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of JBL L82 Classic?
Here are the items that are included inside the box of L82 Classic:
Bookshelf loudspeaker
Grille
Owner's Manual
What's in the Box of KEF LS50?
Here are the items that come with the LS50:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
 Max Input Power |
125 watts
vs
100 watts
|
Handle more power from your amplifier |
 Sensitivity |
88 dB
vs
85 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
8 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
44 Hz
vs
79 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
28k Hz
|
Generates higher frequency |
 Port Position |
Front
vs
Rear
|
Gives more flexibility placing close to walls |
 Height |
302mm
vs
472mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
556cm2 (200x278mm)
vs
886cm2 (281x315mm)
|
Takes less floor space |
| General |
JBL L82 Classic |
KEF LS50 |
| Brand |
JBL |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
25-125 watts |
25-100 watts |
| Sensitivity |
88 dB |
85 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.2 ohms |
| Frequency Response |
44-40k Hz |
79-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
5.25" |
| Woofer Composition |
Pulp |
Magnesium/aluminum alloy |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Dome |
Vented dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
1700Hz |
2200Hz |
| Firing Direction |
front |
rear |
Physical Specs |
|
|
| Height |
472.8mm (18.6") |
302.0mm (11.9") |
| Width |
281.0mm (11.1") |
200.0mm (7.9") |
| Depth |
315.5mm (12.4") |
278.0mm (10.9") |
| Weight |
12.80kg (28.2lbs) |
7.20kg (15.8lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood veneer |
Polymer/Lacquer |
| Available Colors |
Walnut |
Black, High Gloss Piano Black, High Gloss Piano White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
15.5" |
18-28" |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |