In this review, we will be comparing 3030i and Q350, two Passive Bookshelf speakers from Q Acoustics and KEF.
Let's have a brief look at the main features
of Q Acoustics 3030i and KEF Q350 first before getting into our more
detailed comparison.
| Key Specs | Q Acoustics 3030i | KEF Q350 |
|---|
| Brand | Q Acoustics
United Kingdom · founded 2006 | KEF
United Kingdom · founded 1961 |
|---|
| Design | 2-way | 2-way |
|---|
| Uni-Q driver | — | 11th Generation Uni-Q |
|---|
| Tweeter | 1" decoupled | 1" Dome |
|---|
| Woofer | 6.5" Coated paper | 6.5" Aluminum |
|---|
| Frequency response | 46-30k Hz | 63-28k Hz |
|---|
| Sensitivity | 88 dB | 87 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 25-75 watts | 10-120 watts |
|---|
| Weight | 6.20kg / 13.6lbs | 7.60kg / 16.7lbs |
|---|
| Dimensions (H x W x D) | 12.7" x 7.8" x 12.9"
325.0 x 200.0 x 329.0mm | 14.0" x 8.2" x 12.0"
358.0 x 210.0 x 306.0mm |
|---|
What size room are the Q Acoustics 3030i and KEF Q350 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* |
Q Acoustics 3030i |
KEF Q350 |
| Near-field |
Good |
Poor |
| Small Room |
Good |
Average |
| Mid-size Room |
Average |
Good |
| Large Room |
Poor |
Average |
| Very Large Room |
No way |
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.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
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through our links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both 3030i and Q350 are 2-way speakers.
Q Acoustics 3030iKEF Q350
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Q Acoustics 3030i |
KEF Q350 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6.5-inch
|
3030i features a 1" decoupled Tweeter and 1 x 6.5" Coated paper Woofer with a Crossover frequency at 2400Hz. On the other hand, the Q350 features a 1" vented aluminum Dome Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
3030i has a frequency range of 46-30k Hz whereas Q350 has a frequency range of 63-28k Hz. With a minimum frequency of 46Hz, the 3030i can go significantly deeper on the low side and provide stronger bass compared to the Q350's min frequency of 63Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
3030i is a 6 ohms speaker compared to the Q350 which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. 3030i sensitivity is rated at 88 dB and the Q350's is rated at 87 dB. This 1 dB difference makes the Q Acoustics 3030i a more sensitive speaker compared to KEF Q350, 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. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Q350 can handle a max power of 120 watts RMS, whereas 3030i has a max power handling value of 75 watts RMS, 45 watts less than the Q350.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Input Type and Bi-Amping / Bi-Wiring
3030i features Post type posts and Q350 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
KEF Q350's Post terminals
Cabinet Type and Port Position
Both 3030i and Q350 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.
Physical Specs
The size of a speaker can sometimes be 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 3030i's and KEF Q350's external dimensions. Q Acoustics 3030i has external dimensions of 325.0 x 200.0 x 329.0mm (12.7 x 7.8 x 12.9inch) whereas KEF Q350 has external dimensions of 358.0 x 210.0 x 306.0mm (14.0 x 8.2 x 12.0inch).
Q Acoustics 3030i is 10mm narrower and 33mm shorter than KEF Q350 but it is also 23mm deeper.
Below you can see the front view size comparison of Q Acoustics 3030i and KEF Q350 in scale.
Comparison image of Q Acoustics 3030i and KEF Q350 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 3030i is approximately 658.0cm2 / 102.0inch2 and base area of the KEF Q350 is approximately 642.6cm2 / 99.6inch2. The 3030i requires 2% more surface area than the Q350 which gives it a small disadvantage on placement in tight spaces.
Here is 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 3030i and KEF Q350 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 3030i weighs 6.20kg / 13.6lbs and the KEF Q350 weighs 7.60kg / 16.7lbs. This makes the Q350 23% heavier than the 3030i.
Here is a comparison of how 3030i and Q350'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 3030i?
Here are the items that are included inside the box of 3030i:
- 2 x 3030i bookshelf speakers
- 2 x Speaker Grilles
- 2 x Foam Bungs
- 1 x User Manual
What's in the Box of KEF Q350?
Here are the items that come with the Q350:
- 2 Bookshelf loudspeakers
- 2 Foam port plugs
- 8 Self-adhesive rubber feet
- Owner's Manual
- Warranty Registration Card
 Sensitivity |
88 dB
vs
87 dB
|
Play louder with same amount of amplification power |
 Minimum Impedance |
4 ohms
vs
3.7 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Low Frequency Response |
46 Hz
vs
63 Hz
|
Generates deeper bass |
 High Frequency Response |
30k Hz
vs
28k Hz
|
Generates higher frequency |
 Height |
325mm
vs
358mm
|
Easier to fit in smaller spaces |
 Price per pair* |
499USD
vs
750USD
|
costs less (*prices may change depending on the seller, location and time) |
 Max Input Power |
120 watts
vs
75 watts
|
Handle more power from your amplifier |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Base Surface Area |
642cm2
vs
658cm2
|
Takes less floor space |
| General |
Q Acoustics 3030i |
KEF Q350 |
| Brand |
Q Acoustics |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
25-75 watts |
10-120 watts |
| Sensitivity |
88 dB |
87 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
4 ohms |
3.7 ohms |
| Frequency Response |
46-30k Hz |
63-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Coated paper |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
decoupled |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2400Hz |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
325.0mm (12.8") |
358.0mm (14.1") |
| Width |
200.0mm (7.9") |
210.0mm (8.3") |
| Depth |
329.0mm (13") |
306.0mm (12") |
| Weight |
6.20kg (13.6lbs) |
7.60kg (16.7lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
n/a |
MDF/Vinyl-wrapped |
| Available Colors |
Walnut, Black, White |
Black, Walnut, White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
18-24" |
| 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 |
A generation apart: Q Acoustics 3030i is the newer design, against a 2016 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | A | Q Acoustics 3030i digs deeper - 46Hz against 63Hz. |
| Amplifier needs | evenly matched | Similar sensitivity (88dB vs 87dB) - both want much the same power. |
| Amplifier match | B | KEF Q350 is the easier load at 8 ohms. |
| Headroom | B | KEF Q350 takes more power (120W vs 75W) - more in hand in a big room. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Price | A | Q Acoustics 3030i is cheaper - $499 against $750, about 33% less. |
A Q Acoustics 3030i B KEF Q350
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
KEF Q350 is ahead, but only on 1 of the measured areas, and it costs about 50% more. That is a lot of money for a narrow margin on paper - Q Acoustics 3030i looks like the sensible buy unless something else about the KEF Q350 appeals to you. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 63Hz anyway, so judge these on the other rows instead. Match it to your room: we rate Q Acoustics 3030i the better fit for near-field listening and a small room, and KEF Q350 for a mid-size room and a large room.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.