In this review, we will be comparing RP-600M and LS50, two Passive Bookshelf speakers from Klipsch and KEF.
Let's have a brief look at the main features
of Klipsch RP-600M and KEF LS50 first before getting into our more
detailed comparison.
| Key Specs | Klipsch RP-600M | KEF LS50 |
|---|
| Brand | Klipsch
United States · founded 1946 | KEF
United Kingdom · founded 1961 |
|---|
| Design | 2-way | 2-way |
|---|
| Uni-Q driver | — | 11th Generation Uni-Q |
|---|
| Tweeter | 1" Tractrix Horn | 1" Vented dome |
|---|
| Woofer | 6.5" Cerametallic | 5.25" Magnesium/aluminum alloy |
|---|
| Frequency response | 45-25k Hz | 79-28k Hz |
|---|
| Sensitivity | 96 dB | 85 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | up to 100 watts | 25-100 watts |
|---|
| Weight | 7.30kg / 16.1lbs | 7.20kg / 15.8lbs |
|---|
| Dimensions (H x W x D) | 15.7" x 7.9" x 11.8"
399.0 x 202.0 x 301.0mm | 11.8" x 7.8" x 10.9"
302.0 x 200.0 x 278.0mm |
|---|
What size room are the Klipsch RP-600M 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:
| Listening Environment* |
Klipsch RP-600M |
KEF LS50 |
| 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 RP-600M and LS50 are 2-way speakers.
Klipsch RP-600MKEF LS50
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Klipsch RP-600M |
KEF LS50 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 5.25-inch
|
RP-600M features a 1" Tractrix Horn Tweeter and 1 x 6.5" Cerametallic Woofer with a Crossover frequency at 1500Hz. 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
RP-600M has a frequency range of 45-25k Hz whereas LS50 has a frequency range of 79-28k Hz. With a minimum frequency of 45Hz, the RP-600M can go significantly deeper on the low side and provide stronger bass compared to the LS50's min frequency of 79Hz.
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
RP-600M and LS50 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. RP-600M sensitivity is rated at 96 dB and the LS50's is at 85 dB. This 11 dB difference makes the Klipsch RP-600M 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. 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 RP-600M is rated up to 100 watts and LS50 25-100 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.
Input Type and Bi-Amping / Bi-Wiring
RP-600M features Dual binding posts/bi-wire/bi-amp posts which make bi-amping or bi-wiring possible. LS50 has a Post which doesn't feature bi-amping/bi-wiring.
Klipsch RP-600M's Dual binding posts/bi-wire/bi-amp terminals allows Bi-amping or bi-wiring
KEF LS50's Post terminals
Cabinet Type and Port Position
Both RP-600M and LS50 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.
Klipsch RP-600M Tractrix horn-shaped 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 Klipsch RP-600M's and KEF LS50's external dimensions. Klipsch RP-600M has external dimensions of 399.0 x 202.0 x 301.0mm (15.7 x 7.9 x 11.8inch) whereas KEF LS50 has external dimensions of 302.0 x 200.0 x 278.0mm (11.8 x 7.8 x 10.9inch).
Klipsch RP-600M is clearly the larger of the two speakers. Its body is 2mm wider, 97mm taller and 23mm deeper than KEF LS50.
Below you can see the front view size comparison of Klipsch RP-600M and KEF LS50 in scale.
Comparison image of Klipsch RP-600M 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 Klipsch RP-600M is approximately 608.0cm2 / 94.2inch2 and base area of the KEF LS50 is approximately 556.0cm2 / 86.2inch2. The RP-600M requires 9% more surface area than the LS50 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 Klipsch RP-600M and KEF LS50 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 Klipsch RP-600M weighs 7.30kg / 16.1lbs and the KEF LS50 weighs 7.20kg / 15.8lbs. This makes the RP-600M 1% heavier than the LS50.
Here is a comparison of how RP-600M 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 Klipsch RP-600M?
Here are the items that are included inside the box of RP-600M:
- 2 Bookshelf loudspeakers
- 2 Grilles (installed)
- 8 Self-adhesive rubber feet
- 4 Terminal jumpers (installed)
- User Manual
- Important Safety Instructions
- Warranty Information
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
 Sensitivity |
96 dB
vs
85 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
45 Hz
vs
79 Hz
|
Generates deeper bass |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Price per pair* |
459USD
vs
1300USD
|
costs less (*prices may change depending on the seller, location and time) |
 High Frequency Response |
28k Hz
vs
25k Hz
|
Generates higher frequency |
 Height |
302mm
vs
399mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
556cm2
vs
608cm2
|
Takes less floor space |
| General |
Klipsch Reference Premiere RP-600M |
KEF LS50 |
| Brand |
Klipsch |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
up to 100 watts |
25-100 watts |
| Sensitivity |
96 dB |
85 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.2 ohms |
| Frequency Response |
45-25k Hz |
79-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
5.25" |
| Woofer Composition |
Cerametallic |
Magnesium/aluminum alloy |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Tractrix Horn |
Vented dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
1500Hz |
2200Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
399.0mm (15.7") |
302.0mm (11.9") |
| Width |
202.0mm (8") |
200.0mm (7.9") |
| Depth |
301.0mm (11.9") |
278.0mm (10.9") |
| Weight |
7.30kg (16.1lbs) |
7.20kg (15.8lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
Polymer/Lacquer |
| Available Colors |
Ebony, Walnut, Piano Black |
Black, High Gloss Piano Black, High Gloss Piano White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
22-26" |
18-28" |
| Grille |
Yes |
n/a |
| 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 - KEF LS50 costs roughly 2.8x what Klipsch RP-600M 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 | Klipsch RP-600M digs deeper - 45Hz against 79Hz. |
| Amplifier needs | A | Klipsch RP-600M is more sensitive (96dB vs 85dB), so it goes louder on the same amplifier. |
| Headroom | evenly matched | Similar power handling (100W vs 100W). |
| Size | depends | KEF LS50 is easier to place; Klipsch RP-600M is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | A | Klipsch RP-600M: bi-amping. Klipsch RP-600M sits in a wider range (17 models), so a matched surround system is easier later. |
| Price | A | Klipsch RP-600M is cheaper - $459 against $1,300, about 65% less; arguably a different class. |
A Klipsch RP-600M B KEF LS50
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?
Klipsch RP-600M is the easier recommendation: it leads on most of the measured areas and costs less. Take KEF LS50 if its size, looks or fit in your room suit you better. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 79Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Klipsch RP-600M has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, KEF LS50 is the easier speaker to get right.
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.