In this review, we will be comparing LSX II and 3020i, two Bookshelf speakers from KEF and Q Acoustics. The main difference between these two speakers is that the KEF LSX II is a Powered speaker which means that it has a built-in amplifier inside the speaker body so you don't need an external power amp or an integrated amp whereas the Q Acoustics 3020i is a Passive speaker so has to be matched with an amplifier to get any sound from it.
Let's have a brief look at the main features
of KEF LSX II and Q Acoustics 3020i first before getting into our more
detailed comparison.
KEF LSX II Key Specs
- 2-way Design
- 200-watt RMS Integrated Amplifier
- 11th Generation Uni-Q Driver
- 0.75" Hard-Dome Tweeter
- 4.5" Magnesium/Aluminium alloy Woofer
- 54-28k Hz Frequency Response
- 24-bit Max Depth / 384 kHz Max Sample Rate
- Built-in 4.2 Bluetooth
- App Control Feature
- Weight:3.60kg
- Dimensions (H x W x D): 240.0" x 6.1" x 7.1"( 240 × 155 × 180 mm )
Q Acoustics 3020i Key Specs
- 2-way Design
- 0.9" decoupled Tweeter
- 5" Coated paper Woofer
- 64-30k Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 6ohms
- Power Range:25-75watts
- Weight:4.80kg
- Dimensions (H x W x D): 278.0" x 6.6" x 11.1"( 278.0 x 170.0 x 282.0mm )
In the following sections, we will get into more detail in order to better understand how the KEF LSX II and Q Acoustics 3020i 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 LSX II and 3020i are 2-way speakers.
| Driver |
KEF LSX II |
Q Acoustics 3020i |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
0.9-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 4.5-inch
|
1 x 5-inch
|
LSX II features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4.5" Magnesium/Aluminium alloy Woofer . On the other hand, the 3020i features a 0.9" decoupled Tweeter and 1 x 5" Coated paper Woofer with a Crossover frequency at 2400Hz.
Frequency Response
LSX II has a frequency range of 54-28k Hz whereas 3020i has a frequency range of 64-30k Hz. With a minimum frequency of 54Hz, the LSX II can go significantly deeper on the low side and provide stronger bass compared to the 3020i's min frequency of 63Hz.
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.
Cabinet Type and Port Position
Both LSX II and 3020i have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
KEF LSX II 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 KEF LSX II's and Q Acoustics 3020i's external dimensions. KEF LSX II has external dimensions of 240 × 155 × 180 mm ( 9.5 × 6.1 × 7.1 inch) whereas Q Acoustics 3020i has external dimensions of 278.0 x 170.0 x 282.0mm ( 10.9 x 6.6 x 11.1inch) .
Q Acoustics 3020i is clearly the larger of the two speakers. Its body is 15mm wider, 38mm taller and 102mm deeper than KEF LSX II.
Below you can see the front view size comparison of KEF LSX II and Q Acoustics 3020i in scale.
Comparison image of KEF LSX II and Q Acoustics 3020i 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 KEF LSX II is approximately 279.0cm2 / 43.2inch2 and base area of the Q Acoustics 3020i is approximately 479.4cm2 / 74.3inch2. The LSX II requires 42% less surface area than the 3020i which gives it a small advantage on placement in tight spaces.
Here is an another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale:
Size Comparison image of KEF LSX II and Q Acoustics 3020i on a Media Console
What's in the Box of KEF LSX II?
Here are the items that are included inside the box of LSX II:
2 Wireless powered speakersTwo 6.5-feet AC power cords10-feet Cat-6 interconnect speaker cableRemote control2 AAA batteries Quick Start Guide Important Safety Information Warranty Information Maintenance Guide
What's in the Box of Q Acoustics 3020i?
Here are the items that come with the 3020i:
2 x 3020i bookshelf speakers 2 x Foam Bungs 2 x Speaker Grilles 1 x User Manual 1 x Handling Gloves 8 x Rubber Speaker Grips