In this review, we will be comparing S 805 and RTi A5, two Passive Floor-standing speakers from Jamo and Polk Audio. Let's have a brief look at the main features
of Jamo S 805 and Polk RTi A5 first before getting into our more
detailed comparison.
What size room are the Jamo S 805 and Polk RTi A5 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 Jamo S 805 and Polk RTi A5 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 S 805 and RTi A5 are 2-way speakers.
| Driver |
Jamo S 805 |
Polk RTi A5 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5-inch
|
2 x 6.5-inch
|
S 805 features a 1" Tweeter and 1 x 5" Aluminized Polyfiber Woofer with a Crossover frequency at 2000Hz. On the other hand, the RTi A5 features a 1" Tweeter and 2 x 6.5" Polymer composite Woofer .
Frequency Response
S 805 has a frequency range of 49-26k Hz whereas RTi A5 has a frequency range of 40-26k Hz. With a minimum frequency of 40Hz, the RTi A5 can go significantly deeper on the low side and provide stronger bass compared to the S 805's min frequency of 49Hz.
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 Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing 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
S 805 and RTi A5 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. S 805 sensitivity is rated at 88 dB and the RTi A5's is at 90 dB. This 2 dB difference makes the Polk RTi A5 a more sensitive speaker compared to Jamo S 805, 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. 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.
S 805 can handle a max power of 250 watts RMS from the amp the whereas S 805 has a max power handling value of 80 watts RMS , 170 watts less than the RTi A5.
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 A5 features 5-way post posts which make bi-amping or bi-wiring possible. S 805 has a Binding post which doesn't feature bi-amping/bi-wiring.
Jamo S 805's Binding post terminals
Cabinet Type and Port Position
Both S 805 and RTi A5 have front firing ports. front ported speakers offers more flexibility in placement in regards to proximity to walls&surfaces compared to rear ported speakers.
Jamo S 805 Port
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 Jamo S 805's and Polk RTi A5's external dimensions. Jamo S 805 has external dimensions of 787.0 x 191.0 x 252.0mm ( 31-1/2 x 9-7/8 x 11-1/8inch) whereas Polk RTi A5 has external dimensions of 1007.0 x 269.0 x 404.0mm ( 39-5/8 x 10-9/16 x 15-7/8inch) .
Polk RTi A5 is clearly the larger of the two speakers. Its body is 78mm wider, 220mm taller and 152mm deeper than Jamo S 805.
Below you can see the front view size comparison of Jamo S 805 and Polk RTi A5 in scale.
Comparison image of Jamo S 805 and Polk RTi A5 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 Jamo S 805 is approximately 481.3cm2 / 74.6inch2 and base area of the Polk RTi A5 is approximately 1086.8cm2 / 168.5inch2. The S 805 requires 56% less surface area than the RTi A5 which gives it a small advantage 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 Jamo S 805 weighs 8.60kg / 18.9lbs and the Polk RTi A5 weighs 18.18kg / 40lbs. This makes the RTi A5 111% heavier than the S 805.
Here is a comparison of how S 805 and RTi A5'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 Jamo S 805?
Here are the items that are included inside the box of S 805:
2 Floorstanding loudspeakers2 Grilles8 Mounting feet16 ScrewsUser ManualImportant Safety InstructionsWarranty Information
What's in the Box of Polk RTi A5?
Here are the items that come with the RTi A5:
Cherry floor-standing speakerDetachable black cloth grille4 Screw-on spike feetOwners ManualOnline registration sheetPolk Audio product brochure
 Height |
787mm
vs
1007mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
481cm2 (191x252mm)
vs
1086cm2 (269x404mm)
|
Takes less floor space |
 Max Input Power |
250 watts
vs
80 watts
|
Handle more power from your amplifier |
 Sensitivity |
90 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Woofer Size |
6.5 inches
vs
5 inches
|
Larger woofer |
| Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
40 Hz
vs
49 Hz
|
Generates deeper bass |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
| General |
Jamo Studio S 805 |
Polk Audio RTi A5 |
| Brand |
Jamo |
Polk Audio |
| Speaker Type |
Floor-standing |
Floor-standing speaker |
| Power Range |
up to 80 watts |
20-250 watts |
| Sensitivity |
88 dB |
90 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
49-26k Hz |
40-26k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
5" |
6.5" |
| Woofer Composition |
Aluminized Polyfiber |
Polymer composite |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2000Hz |
n/a |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
787.0mm (31") |
1007.0mm (39.6") |
| Width |
191.0mm (7.5") |
269.0mm (10.6") |
| Depth |
252.0mm (9.9") |
404.0mm (15.9") |
| Weight |
8.60kg (18.9lbs) |
18.18kg (40lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Vinyl |
Real wood veneer |
| Available Colors |
Walnut |
Cherry |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |