In this review, we will be comparing Ultra Tower and R5, two Passive Floor-standing speakers from SVS and KEF.
Let's have a brief look at the main features
of SVS Ultra Tower and KEF R5 first before getting into our more
detailed comparison.
| Key Specs | SVS Ultra Tower | KEF R5 |
|---|
| Design | 3-way | 3-way |
|---|
| Uni-Q driver | — | 12th Generation Uni-Q |
|---|
| Tweeter | 1.0" Dome | 1" Dome |
|---|
| Midrange | 2 x 6.5" | 5" |
|---|
| Woofer | 2 x 8.0" Polypropylene | 2 x 5.25" Hybrid Aluminum |
|---|
| Frequency response | 28-32k Hz | 58-28k Hz |
|---|
| Sensitivity | 88 dB | 87 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 20-300 watts | 15-200 watts |
|---|
| Weight | 34.27kg / 75.4lbs | 27.30kg / 60.1lbs |
|---|
| Dimensions (H x W x D) | 45-5/8" x 13-15/16" x 17-1/2"
1159.0 x 355.0 x 445.0mm | 42-3/8" x 10-3/4" x 13-13/16"
1077.0 x 274.0 x 351.0mm |
|---|
What size room are the SVS Ultra Tower and KEF R5 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* |
SVS Ultra Tower |
KEF R5 |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Average |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
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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Drivers
Both Ultra Tower and R5 are 3-way speakers.
SVS Ultra TowerKEF R5
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
SVS Ultra Tower |
KEF R5 |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1.0-inch
|
1-inch
|
|
Midrange
|
2 x 6.5-inch |
1 x 5-inch |
|
Woofer
|
2 x 8.0-inch
|
2 x 5.25-inch
|
Ultra Tower features a 1.0" aluminum Dome Tweeter, a 6.5" Midrange and 2 x 8.0" Polypropylene Woofer with a Crossover frequency at 160HZ and 2000Hz. On the other hand, the R5 features a 1" aluminum Dome Tweeter, a 5" Midrange and 2 x 5.25" Hybrid Aluminum Woofer with a Crossover frequency at 400Hz and 2900Hz.
Frequency Response
Ultra Tower has a frequency range of 28-32k Hz whereas R5 has a frequency range of 58-28k Hz. With a minimum frequency of 28Hz, the Ultra Tower can go significantly deeper on the low side and provide stronger bass compared to the R5's min frequency of 58Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing 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
Ultra Tower and R5 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Ultra Tower sensitivity is rated at 88 dB and the R5's is at 87 dB. This 1 dB difference makes the SVS Ultra Tower a more sensitive speaker compared to KEF R5, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing 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.
Ultra Tower can handle a max power of 300 watts RMS, whereas R5 has a max power handling value of 200 watts RMS, 100 watts less than the Ultra Tower.
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
Both Ultra Tower and R5 features dual binding post speaker terminals for bi-amping or bi-wiring.
SVS Ultra Tower's Binding post terminals allows Bi-amping or bi-wiring
KEF R5's Binding post terminals allows Bi-amping or bi-wiring
KEF R5 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 SVS Ultra Tower's and KEF R5's external dimensions. SVS Ultra Tower has external dimensions of 1159.0 x 355.0 x 445.0mm (45-5/8 x 13-15/16 x 17-1/2inch) whereas KEF R5 has external dimensions of 1077.0 x 274.0 x 351.0mm (42-3/8 x 10-3/4 x 13-13/16inch).
SVS Ultra Tower is clearly the larger of the two speakers. Its body is 81mm wider, 82mm taller and 94mm deeper than KEF R5.
Below you can see the front view size comparison of SVS Ultra Tower and KEF R5 in scale.
Comparison image of SVS Ultra Tower and KEF R5 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 SVS Ultra Tower is approximately 1579.8cm2 / 244.9inch2 and base area of the KEF R5 is approximately 961.7cm2 / 149.1inch2. The Ultra Tower requires 64% more surface area than the R5 which gives it a small disadvantage on placement in tight spaces.
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 SVS Ultra Tower weighs 34.27kg / 75.4lbs and the KEF R5 weighs 27.30kg / 60.1lbs. This makes the Ultra Tower 26% heavier than the R5.
Here is a comparison of how Ultra Tower and R5's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
What's in the Box of SVS Ultra Tower?
Here are the items that are included inside the box of Ultra Tower:
- Floorstanding loudspeaker
- Cloth grille
- 2 Metal grilles
- Foam port plug
- 4 Elastomer isolation feet (pre-installed)
- 4 Spike feet
- 4 Nuts
- 4 Protective discs
- 2 Terminal jumpers (pre-installed)
- Owners Manual
- SVS brochure
- Online Product Registration Card
What's in the Box of KEF R5?
Here are the items that come with the R5:
- Floorstanding loudspeaker
- Grille
- 2 Foam port plugs
- 4 Outrigger feet
- 4 Spikes
- 4 Protective discs
- 4 Screws
- 4 Washers
- Wrench
- Hex-key
- User Manual
- Warranty Information
 Max Input Power |
300 watts
vs
200 watts
|
Handle more power from your amplifier |
 Sensitivity |
88 dB
vs
87 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
8.0 inches
vs
5.25 inches
|
Larger woofer |
|
Low Frequency Response |
28 Hz
vs
58 Hz
|
Generates deeper bass |
 High Frequency Response |
32k Hz
vs
28k Hz
|
Generates higher frequency |
 Price per pair* |
2600USD
vs
3300USD
|
costs less (*prices may change depending on the seller, location and time) |
 Height |
1077mm
vs
1159mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
961cm2
vs
1579cm2
|
Takes less floor space |
| General |
SVS Ultra Tower |
KEF R5 |
| Brand |
SVS |
KEF |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
20-300 watts |
15-200 watts |
| Sensitivity |
88 dB |
87 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.2 ohms |
| Frequency Response |
28-32k Hz |
58-28k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
8.0" |
5.25" |
| Woofer Composition |
Polypropylene |
Hybrid Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1.0" |
1" |
| Tweeter Type |
Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
6.5" |
5" |
| Crossover Frequency |
160HZ and 2000Hz |
400Hz and 2900Hz |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
1159.0mm (45.6") |
1077.0mm (42.4") |
| Width |
355.0mm (14") |
274.0mm (10.8") |
| Depth |
445.0mm (17.5") |
351.0mm (13.8") |
| Weight |
34.27kg (75.4lbs) |
27.30kg (60.1lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Oak veneer |
MDF/Lacquer |
| Available Colors |
Black Oak,Piano Gloss Black,Piano Gloss White |
Black Gloss, White Gloss, Walnut |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |
A generation apart: KEF R5 is the newer design, against a 2013 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 |
SVS Ultra Tower digs deeper - 28Hz against 58Hz. |
| Amplifier needs |
evenly matched |
Similar sensitivity (88dB vs 87dB) - both want much the same power. |
| Headroom |
A |
SVS Ultra Tower takes more power (300W vs 200W) - more in hand in a big room. |
| Size |
depends |
KEF R5 is easier to place; SVS Ultra Tower is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability |
depends |
SVS Ultra Tower: bi-amping; KEF R5: bi-amping. |
| Price |
A |
SVS Ultra Tower is cheaper - $2,600 against $3,300, about 21% less. |
A SVS Ultra Tower
B KEF R5
depends neither is better in the abstract - it turns on your room, placement 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?
SVS Ultra Tower is the easier recommendation: it leads on most of the measured areas and costs less. Take KEF R5 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 58Hz anyway, so judge these on the other rows instead. Match it to your room: we rate SVS Ultra Tower the better fit for a very large room, and KEF R5 for a mid-size 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.