In this review, we will be comparing Ultra Bookshelf and L100, two Passive Bookshelf speakers from SVS and Polk Audio. Let's have a brief look at the main features
of SVS Ultra Bookshelf and Polk L100 first before getting into our more
detailed comparison.
What size room are the SVS Ultra Bookshelf and Polk L100 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 SVS Ultra Bookshelf and Polk L100 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 Ultra Bookshelf and L100 are 2-way speakers.
Driver |
SVS Ultra Bookshelf |
Polk L100 |
Driver Setup
|
2-way
|
2-way
|
Tweeter
|
1-inch
|
1-inch
|
Midrange
|
- |
- |
Woofer
|
1 x 6.5-inch
|
1 x 5.25-inch
|
Ultra Bookshelf features a 1" aluminum Hard-Dome Tweeter and 1 x 6.5" Composite glass-fiber Woofer with a Crossover frequency at 2000Hz. On the other hand, the L100 features a 1" Ring Radiator Tweeter and 1 x 5.25" Polypropylene Woofer with a Crossover frequency at 2900Hz.
Frequency Response
Ultra Bookshelf has a frequency range of 45-32k Hz whereas L100 has a frequency range of 57-38k Hz. With a minimum frequency of 45Hz, the Ultra Bookshelf can go significantly deeper on the low side and provide stronger bass compared to the L100's min frequency of 57Hz.
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
Ultra Bookshelf is a 8 ohms speaker compared to the L100 which has a nominal impedance of 4 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the L100 can provide this impedance level.
These two speakers also have different sensitivity levels. Ultra Bookshelf sensitivity is rated at 87 dB and the L100's is rated at 85.5 dB. This 1 dB difference makes the SVS Ultra Bookshelf a more sensitive speaker compared to Polk L100, 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.
Ultra Bookshelf can handle a max power of 160 watts RMS from the amp the whereas Ultra Bookshelf has a max power handling value of 150 watts RMS , 10 watts less than the L100.
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
Ultra Bookshelf features 5-way post posts which make bi-amping or bi-wiring possible. L100 has a Post which doesn't feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both Ultra Bookshelf and L100 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
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 SVS Ultra Bookshelf's and Polk L100's external dimensions. SVS Ultra Bookshelf has external dimensions of 380.0 x 218.0 x 281.0mm ( 14-15/16 x 8-9/16 x 11-1/16inch) whereas Polk L100 has external dimensions of 348.0 x 201.0 x 288.0mm ( 13-11/16 x 7-7/8 x 11-5/16inch) .
Polk L100 is 17mm narrower and 32mm shorter than SVS Ultra Bookshelf but it is also 7mm deeper.
Below you can see the front view size comparison of SVS Ultra Bookshelf and Polk L100 in scale.
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 Bookshelf is approximately 612.6cm2 / 95.0inch2 and base area of the Polk L100 is approximately 578.9cm2 / 89.7inch2. The Ultra Bookshelf requires 6% more surface area than the L100 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:
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 Bookshelf weighs 8.64kg / 19lbs and the Polk L100 weighs 7.68kg / 16.9lbs. This makes the Ultra Bookshelf 13% heavier than the L100.
Here is a comparison of how Ultra Bookshelf and L100's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of SVS Ultra Bookshelf?
Here are the items that are included inside the box of Ultra Bookshelf:
2 Bookshelf loudspeakers2 Grilles8 Rubber feet2 Terminal jumpers (pre-installed)Owners ManualSVS brochureOnline Product Registration Card
What's in the Box of Polk L100?
Here are the items that come with the L100:
2 Bookshelf loudspeakers 2 Grilles Cleaning cloth Owners Manual Online Registration
Sensitivity |
87 dB
vs
86 dB
|
Play louder with same amount of amplification power |
Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
Low Frequency Response |
45 Hz
vs
57 Hz
|
Generates deeper bass |
Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
Max Input Power |
160 watts
vs
150 watts
|
Handle more power from your amplifier |
High Frequency Response |
38k Hz
vs
32k Hz
|
Generates higher frequency |
Height |
348mm
vs
380mm
|
Easier to fit in smaller spaces |
Base Surface Area |
578cm2 (201x288mm)
vs
612cm2 (218x281mm)
|
Takes less floor space |
Price per pair* |
999USD
vs
1200USD
|
costs less (*prices may change depending on the seller, location and time) |
General |
SVS Ultra Bookshelf |
Polk Audio Legend L100 |
Brand |
SVS |
Polk Audio |
Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
Power Range |
20-150 watts |
30-160 watts |
Sensitivity |
87 dB |
85.5 dB |
Impedance |
8 ohms |
4 ohms |
Impedance |
n/a |
3 ohms |
Frequency Response |
45-32k Hz |
57-38k Hz |
Drivers |
|
|
Woofer Quantity |
1 |
1 |
Woofer Size |
6.5" |
5.25" |
Woofer Composition |
Composite glass-fiber |
Polypropylene |
Woofer Surround Material |
Rubber |
Rubber |
Tweeter Size |
1" |
1" |
Tweeter Type |
Hard-Dome |
Ring Radiator |
Aimable Tweeter |
No |
No |
Midrange Driver |
No |
No |
Crossover Frequency |
2000Hz |
2900Hz |
Firing Direction |
rear |
rear |
Physical Specs |
|
|
Height |
380.0mm (15") |
348.0mm (13.7") |
Width |
218.0mm (8.6") |
201.0mm (7.9") |
Depth |
281.0mm (11.1") |
288.0mm (11.3") |
Weight |
8.64kg (19lbs) |
7.68kg (16.9lbs) |
Enclosure |
Bass Reflex |
Bass Reflex |
Finish |
MDF/Oak veneer |
MDF/Wood veneer |
Available Colors |
Black Oak,Piano Gloss Black,Piano Gloss White |
Brown Walnut, Black Ash |
Mounting Bracket |
No |
No |
Recommended Stand Height |
22-28" |
24-28" |
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 |