In this review, we will be comparing 3020i and SX-50, two Passive Bookshelf speakers from Q Acoustics and Cambridge Audio. Let's have a brief look at the main features
of Q Acoustics 3020i and Cambridge SX-50 first before getting into our more
detailed comparison.
What size room are the Q Acoustics 3020i and Cambridge SX-50 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 Q Acoustics 3020i and Cambridge SX-50 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 3020i and SX-50 are 2-way speakers.
| Driver |
Q Acoustics 3020i |
Cambridge SX-50 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.9-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5-inch
|
1 x 5.25-inch
|
3020i features a 0.9" decoupled Tweeter and 1 x 5" Coated paper Woofer with a Crossover frequency at 2400Hz and 2400Hz. On the other hand, the SX-50 features a 1" Silk Dome Tweeter and 1 x 5.25" Treated paper Woofer .
Frequency Response
3020i has a frequency range of 64-30k Hz whereas SX-50 has a frequency range of 50-22k Hz. With a minimum frequency of 46Hz, the 3020i can go slightly deeper then the SX-50's min frequency of 50Hz.
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
3020i is a 6 ohms speaker compared to the SX-50 which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. 3020i sensitivity is rated at 88 dB and the SX-50's is rated at 90 dB. This 2 dB difference makes the Cambridge SX-50 a more sensitive speaker compared to Q Acoustics 3020i, 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.
3020i can handle a max power of 100 watts RMS from the amp the whereas 3020i has a max power handling value of 75 watts RMS , 25 watts less than the SX-50.
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
3020i features 5-way post type posts and SX-50 has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.
Cambridge SX-50's 5-way post terminals
Cabinet Type and Port Position
Both 3020i and SX-50 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.
Cambridge SX-50 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 Q Acoustics 3020i's and Cambridge SX-50's external dimensions. Q Acoustics 3020i has external dimensions of 278.0 x 170.0 x 282.0mm ( 10.9 x 6.6 x 11.1inch) whereas Cambridge SX-50 has external dimensions of 225.0 x 161.0 x 240.0mm ( 8.8 x 6.3 x 9.4inch) .
Q Acoustics 3020i is clearly the larger of the two speakers. Its body is 9mm wider, 53mm taller and 42mm deeper than Cambridge SX-50.
Below you can see the front view size comparison of Q Acoustics 3020i and Cambridge SX-50 in scale.
Comparison image of Q Acoustics 3020i and Cambridge SX-50 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 Q Acoustics 3020i is approximately 479.4cm2 / 74.3inch2 and base area of the Cambridge SX-50 is approximately 386.4cm2 / 59.9inch2. The 3020i requires 24% more surface area than the SX-50 which gives it a small disadvantage 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 Q Acoustics 3020i and Cambridge SX-50 on a Media Console
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 Q Acoustics 3020i weighs 4.80kg / 10.6lbs and the Cambridge SX-50 weighs 3.00kg / 6.6lbs. This makes the 3020i 60% heavier than the SX-50.
Here is a comparison of how 3020i and SX-50's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Q Acoustics 3020i?
Here are the items that are included inside the box of 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
What's in the Box of Cambridge SX-50?
Here are the items that come with the SX-50:
2 Bookshelf loudspeakers 2 Grilles 8 Self-adhesive feet 2 Foam port inserts Installation Guide
 Low Frequency Response |
46 Hz
vs
50 Hz
|
Generates deeper bass |
 High Frequency Response |
30k Hz
vs
22k Hz
|
Generates higher frequency |
 Max Input Power |
100 watts
vs
75 watts
|
Handle more power from your amplifier |
 Sensitivity |
90 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
| Woofer Size |
5.25 inches
vs
5 inches
|
Larger woofer |
 Height |
225mm
vs
278mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
386cm2 (161x240mm)
vs
479cm2 (170x282mm)
|
Takes less floor space |
 Price per pair* |
199USD
vs
399USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Q Acoustics 3020i |
Cambridge Audio SX-50 |
| Brand |
Q Acoustics |
Cambridge Audio |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
25-75 watts |
10-100 watts |
| Sensitivity |
88 dB |
90 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
4 ohms |
n/a |
| Frequency Response |
64-30k Hz |
50-22k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5" |
5.25" |
| Woofer Composition |
Coated paper |
Treated paper |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
0.9" |
1" |
| Tweeter Type |
decoupled |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2400Hz and 2400Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
278.0mm (10.9") |
225.0mm (8.9") |
| Width |
170.0mm (6.7") |
161.0mm (6.3") |
| Depth |
282.0mm (11.1") |
240.0mm (9.4") |
| Weight |
4.80kg (10.6lbs) |
3.00kg (6.6lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
n/a |
MDF/Woodgrain vinyl |
| Available Colors |
Walnut, Black, White, Grey |
Black |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
28-31" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
4 Years |
5 Years |
| Labor Warranty |
4 Years |
5 Years |