In this review, we will be comparing Silver 50 7G and Q150, two Passive Bookshelf speakers from Monitor Audio and KEF.
Let's have a brief look at the main features
of Monitor Audio Silver 50 7G and KEF Q150 first before getting into our more
detailed comparison.
| Key Specs | Monitor Audio Silver 50 7G | KEF Q150 |
|---|
| Brand | Monitor Audio
United Kingdom · founded 1972 | KEF
United Kingdom · founded 1961 |
|---|
| Design | 2-way | 2-way |
|---|
| Uni-Q driver | — | 11th Generation Uni-Q |
|---|
| Tweeter | 1" Hard-Dome | 1" Dome |
|---|
| Woofer | 5.25" C-CAM RST II | 5.25" Aluminum |
|---|
| Frequency response | 47-35k Hz | 51-28k Hz |
|---|
| Sensitivity | 86 dB | 86 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 40-100 watts | 10-100 watts |
|---|
| Weight | 5.63kg / 12.4lbs | 5.60kg / 12.3lbs |
|---|
| Dimensions (H x W x D) | 11-1/8" x 6-9/16" x 10-3/4"
283.0 x 167.0 x 274.0mm | 11.9" x 7.0" x 10.9"
303.0 x 180.0 x 278.0mm |
|---|
What size room are the Monitor Audio Silver 50 7G and KEF Q150 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* |
Monitor Audio Silver 50 7G |
KEF Q150 |
| Near-field |
Average |
Average |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
Bad |
Bad |
(* 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.
Drivers
Both Silver 50 7G and Q150 are 2-way speakers.
Monitor Audio Silver 50 7GKEF Q150
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Monitor Audio Silver 50 7G |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 5.25-inch
|
Silver 50 7G features a 1" Hard-Dome Tweeter and 1 x 5.25" C-CAM RST II Woofer. On the other hand, the Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
Silver 50 7G has a frequency range of 47-35k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 47Hz, the Silver 50 7G can go slightly deeper then the Q150's min frequency of 51Hz.
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
Silver 50 7G and Q150 have the same Impedance of 8 ohms and their sensitivity is also same at 86 dB.
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.
Both handle the same maximum of 100 watts RMS, though Silver 50 7G is rated 40-100 watts and Q150 10-100 watts.
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.
Monitor Audio Silver 50 7G
Input Type and Bi-Amping / Bi-Wiring
Silver 50 7G features Binding post posts which make bi-amping or bi-wiring possible. Q150 has a Post which doesn't feature bi-amping/bi-wiring.
KEF Q150's Post terminals
KEF Q150 Port
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 Monitor Audio Silver 50 7G's and KEF Q150's external dimensions. Monitor Audio Silver 50 7G has external dimensions of 283.0 x 167.0 x 274.0mm (11-1/8 x 6-9/16 x 10-3/4inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm (11.9 x 7.0 x 10.9inch).
KEF Q150 is clearly the larger of the two speakers. Its body is 13mm wider, 20mm taller and 4mm deeper than Monitor Audio Silver 50 7G.
Below you can see the front view size comparison of Monitor Audio Silver 50 7G and KEF Q150 in scale.
Comparison image of Monitor Audio Silver 50 7G and KEF Q150 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 Monitor Audio Silver 50 7G is approximately 457.6cm2 / 70.9inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The Silver 50 7G requires 9% less surface area than the Q150 which gives it a small advantage 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 Monitor Audio Silver 50 7G and KEF Q150 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 Monitor Audio Silver 50 7G weighs 5.63kg / 12.4lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Silver 50 7G 1% heavier than the Q150.
Here is a comparison of how Silver 50 7G and Q150's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
Monitor Audio Silver 50 7G
What's in the Box of Monitor Audio Silver 50 7G?
Here are the items that are included inside the box of Silver 50 7G:
- 2 Bookshelf loudspeakers
- 2 Grilles
- 4 Jumpers (pre-installed)
- 8 Rubber feet
- 2 Foam port plugs
- Hex-key
- Owners Manual
- Important Safety Instructions
What's in the Box of KEF Q150?
Here are the items that come with the Q150:
- 2 Bookshelf loudspeakers
- 2 Foam port plugs
- 8 Self-adhesive rubber feet
- Owner's Manual
- Warranty Registration Card
 Low Frequency Response |
47 Hz
vs
51 Hz
|
Generates deeper bass |
 High Frequency Response |
35k Hz
vs
28k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
283mm
vs
303mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
457cm2
vs
500cm2
|
Takes less floor space |
 Price per pair* |
600USD
vs
1100USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Monitor Audio Silver 50 7G |
KEF Q150 |
| Brand |
Monitor Audio |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
40-100 watts |
10-100 watts |
| Sensitivity |
86 dB |
86 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.7 ohms |
| Frequency Response |
47-35k Hz |
51-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
5.25" |
| Woofer Composition |
C-CAM RST II |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2500Hz |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
283.0mm (11.1") |
303.0mm (11.9") |
| Width |
167.0mm (6.6") |
180.0mm (7.1") |
| Depth |
274.0mm (10.8") |
278.0mm (10.9") |
| Weight |
5.63kg (12.4lbs) |
5.60kg (12.3lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood veneer |
MDF/Vinyl-wrapped |
| Available Colors |
Ash,High Gloss Black,Black Oak,Satin White |
Black, Walnut, White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
24-28" |
18-24" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |
These sit in different price classes - Monitor Audio Silver 50 7G costs roughly 1.8x what KEF Q150 does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass | A | Monitor Audio Silver 50 7G digs deeper - 47Hz against 51Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (86dB vs 86dB) - both want much the same power. |
| Headroom | evenly matched | Similar power handling (100W vs 100W). |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | A | Monitor Audio Silver 50 7G: bi-amping. |
| Price | B | KEF Q150 is cheaper - $600 against $1,100, about 45% less; arguably a different class. |
A Monitor Audio Silver 50 7G B KEF Q150
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?
The usual trade-off: Monitor Audio Silver 50 7G measures better, KEF Q150 costs about about 83% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. Think about the whole system, not just the speakers: the roughly $500 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
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.