In this review, we will be comparing RTi A1 and Diamond 11.1, two Passive Bookshelf speakers from Polk Audio and Wharfedale. Let's have a brief look at the main features
of Polk RTi A1 and Wharfedale 11.1 first before getting into our more
detailed comparison.
What size room are the Polk RTi A1 and Wharfedale 11.1 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 Polk RTi A1 and Wharfedale 11.1 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 RTi A1 and Diamond 11.1 are 2-way speakers.
Driver |
Polk RTi A1 |
Wharfedale 11.1 |
Driver Setup
|
2-way
|
2-way
|
Tweeter
|
1-inch
|
1-inch
|
Midrange
|
- |
- |
Woofer
|
1 x 5.25-inch
|
1 x 5-inch
|
RTi A1 features a 1" silk polymer composite Dome Tweeter and 1 x 5.25" Polymer composite Woofer with a Crossover frequency at 1900Hz. On the other hand, the Diamond 11.1 features a 1" Soft-Dome Tweeter and 1 x 5" Woven Kevlar Woofer .
Frequency Response
RTi A1 has a frequency range of 60-26k Hz whereas Diamond 11.1 has a frequency range of 55-20k Hz. With a minimum frequency of 55Hz, the Diamond 11.1 can go significantly deeper on the low side and provide stronger bass compared to the RTi A1's min frequency of 60Hz.
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
RTi A1 and Diamond 11.1 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. RTi A1 sensitivity is rated at 89 dB and the Diamond 11.1's is at 87 dB. This 2 dB difference makes the Polk RTi A1 a more sensitive speaker compared to Wharfedale 11.1, 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.
RTi A1 can handle a max power of 125 watts RMS from the amp the whereas Diamond 11.1 has a max power handling value of 100 watts RMS, 25 watts less than the RTi A1.
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
RTi A1 features Pair of Dual 5-way Binding Posts - Gold-Plated posts which make bi-amping or bi-wiring possible. Diamond 11.1 has a Post which doesn't feature bi-amping/bi-wiring.
Cabinet Type and Port Position
RTi A1 has a back and front firing port whereas Diamond 11.1 has a bottom firing ports.
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 Polk RTi A1's and Wharfedale 11.1's external dimensions. Polk RTi A1 has external dimensions of 304.8 x 187.5 x 292.1mm ( 12.0 x 7.3 x 11.5inch) whereas Wharfedale 11.1 has external dimensions of 312.0 x 196.0 x 316.0mm ( 12-1/4 x 7-11/16 x 12-7/16inch) .
Wharfedale 11.1 is clearly the larger of the two speakers. Its body is 8.5mm wider, 7.2mm taller and 23.9mm deeper than Polk RTi A1.
Below you can see the front view size comparison of Polk RTi A1 and Wharfedale 11.1 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 Polk RTi A1 is approximately 547.7cm2 / 84.9inch2 and base area of the Wharfedale 11.1 is approximately 619.4cm2 / 96.0inch2. The RTi A1 requires 12% less surface area than the Diamond 11.1 which gives it a small advantage 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 Polk RTi A1 weighs 5.44kg / 12lbs and the Wharfedale 11.1 weighs 6.81kg / 15lbs. This makes the Diamond 11.1 25% heavier than the RTi A1.
Here is a comparison of how RTi A1 and Diamond 11.1's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Polk RTi A1?
Here are the items that are included inside the box of RTi A1:
2 Cherry bookshelf speakers 2 Self-tapping screws 8 Self-adhesive rubber feet Owner's Manual Template Online registration sheet Polk Audio product brochure
What's in the Box of Wharfedale 11.1?
Here are the items that come with the Diamond 11.1:
2 Bookshelf loudspeakers2 Grilles (pre-installed)8 Self-adhesive rubber feetUser-feets ManualInstallation Guide
Max Input Power |
125 watts
vs
100 watts
|
Handle more power from your amplifier |
Sensitivity |
89 dB
vs
87 dB
|
Play louder with same amount of amplification power |
Woofer Size |
5.25 inches
vs
5 inches
|
Larger woofer |
High Frequency Response |
26k Hz
vs
20k Hz
|
Generates higher frequency |
Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
Mounting Bracket |
Yes
vs
No
|
Allows mounting on walls |
Height |
304mm
vs
312mm
|
Easier to fit in smaller spaces |
Base Surface Area |
547cm2 (187x292mm)
vs
619cm2 (196x316mm)
|
Takes less floor space |
Low Frequency Response |
55 Hz
vs
60 Hz
|
Generates deeper bass |
General |
Polk Audio RTi A1 |
Wharfedale Diamond 11.1 |
Brand |
Polk Audio |
Wharfedale |
Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
Power Range |
20-125 watts |
25-100 watts |
Sensitivity |
89 dB |
87 dB |
Impedance |
8 ohms |
8 ohms |
Frequency Response |
60-26k Hz |
55-20k Hz |
Drivers |
|
|
Woofer Quantity |
1 |
1 |
Woofer Size |
5.25" |
5" |
Woofer Composition |
Polymer composite |
Woven Kevlar |
Woofer Surround Material |
Butyl rubber |
Foam |
Tweeter Size |
1" |
1" |
Tweeter Type |
Dome |
Soft-Dome |
Aimable Tweeter |
No |
No |
Midrange Driver |
No |
No |
Crossover Frequency |
1900Hz |
n/a |
Firing Direction |
back and front |
bottom |
Physical Specs |
|
|
Height |
304.8mm (12") |
312.0mm (12.3") |
Width |
187.5mm (7.4") |
196.0mm (7.7") |
Depth |
292.1mm (11.5") |
316.0mm (12.4") |
Weight |
5.44kg (12lbs) |
6.81kg (15lbs) |
Enclosure |
Bass Reflex |
Bass Reflex |
Finish |
Real wood veneer |
MDF/Wood veneer |
Available Colors |
Black, Cherry |
Rosewood |
Mounting Bracket |
Keyhole |
No |
Recommended Stand Height |
28-36" |
24-28" |
Grille |
n/a |
Yes |
Moisture Resistancy |
No |
No |
Connections |
|
|
Biamp Inputs |
Yes |
No |
Other |
|
|
Parts Warranty |
5 Years |
5 Years |
Labor Warranty |
5 Years |
5 Years |