In this review, we will be comparing BP-9040 and S50, two Passive Floor-standing speakers from Definitive Technology and Polk Audio. Let's have a brief look at the main features
of Definitive BP-9040 and Polk S50 first before getting into our more
detailed comparison.
What size room are the Definitive BP-9040 and Polk S50 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 Definitive BP-9040 and Polk S50 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
One of the fundamental differences between these two speakers is that BP-9040 is a 3-way design whereas the S50 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
Driver |
Definitive BP-9040 |
Polk S50 |
Driver Setup
|
3-way
|
2-way
|
Tweeter
|
1-inch
|
1-inch
|
Midrange
|
3 x 4.5-inch |
- |
Woofer
|
1 x 8-inch
|
2 x 5.25-inch
|
BP-9040 features a 1" annealed aluminum dome Tweeter , a 4.5" Midrange and 1 x 8" Polypropelene Woofer . On the other hand, the S50 features a 1" Terylene Dome Tweeter and 2 x 5.25" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.
Frequency Response
BP-9040 has a frequency range of 22-40k Hz whereas S50 has a frequency range of 33-40k Hz. With a minimum frequency of 22Hz, the BP-9040 can go significantly deeper on the low side and provide stronger bass compared to the S50's min frequency of 33Hz.
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
BP-9040 and S50 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. BP-9040 sensitivity is rated at 92 dB and the S50's is at 89 dB. This 3 dB difference makes the Definitive BP-9040 a more sensitive speaker compared to Polk S50, 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.
BP-9040 can handle a max power of 300 watts RMS from the amp the whereas S50 has a max power handling value of 150 watts RMS, 150 watts less than the BP-9040.
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
S50 features 5-way post posts which make bi-amping or bi-wiring possible. BP-9040 has a 5-Way post, RCA which doesn't feature bi-amping/bi-wiring.
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 Definitive BP-9040's and Polk S50's external dimensions. Definitive BP-9040 has external dimensions of 993.0 x 281.0 x 351.0mm ( 39-1/16 x 11-1/16 x 13-13/16inch) whereas Polk S50 has external dimensions of 951.0 x 262.0 x 281.0mm ( 37-7/16 x 10-5/16 x 11-1/16inch) .
Definitive BP-9040 is clearly the larger of the two speakers. Its body is 19mm wider, 42mm taller and 70mm deeper than Polk S50.
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 Definitive BP-9040 is approximately 986.3cm2 / 152.9inch2 and base area of the Polk S50 is approximately 736.2cm2 / 114.1inch2. The BP-9040 requires 34% more surface area than the S50 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 Definitive BP-9040 weighs 16.36kg / 36lbs and the Polk S50 weighs 14.50kg / 31.9lbs. This makes the BP-9040 13% heavier than the S50.
Here is a comparison of how BP-9040 and S50'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 Definitive BP-9040?
Here are the items that are included inside the box of BP-9040:
Tower loudspeaker6.5-feet AC power cordTop-plate (installed)Stabilizer base4 Floor guides4 Carpet spikes4 Screws4 NutsOwners ManualWhat Obsession Sounds Like card
What's in the Box of Polk S50?
Here are the items that come with the S50:
Floorstanding loudspeakerGrille (attached)4 Feet (pre-installed)Owners ManualOnline Product Registration
Max Input Power |
300 watts
vs
150 watts
|
Handle more power from your amplifier |
Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
Sensitivity |
92 dB
vs
89 dB
|
Play louder with same amount of amplification power |
Woofer Size |
8 inches
vs
5.25 inches
|
Larger woofer |
Low Frequency Response |
22 Hz
vs
33 Hz
|
Generates deeper bass |
Dolby Atmos Drivers |
Optional
vs
No
|
Dolby Atmos Compatibility |
Number of Woofers |
2
vs
1
|
More woofers |
Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
Height |
951mm
vs
993mm
|
Easier to fit in smaller spaces |
Base Surface Area |
736cm2 (262x281mm)
vs
986cm2 (281x351mm)
|
Takes less floor space |
General |
Definitive Technology BP-9040 |
Polk Audio Signature S50 |
Brand |
Definitive Technology |
Polk Audio |
Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
Power Range |
50-300 watts |
20-150 watts |
Sensitivity |
92 dB |
89 dB |
Impedance |
8 ohms |
8 ohms |
Frequency Response |
22-40k Hz |
33-40k Hz |
Drivers |
|
|
Woofer Quantity |
1 |
2 |
Woofer Size |
8" |
5.25" |
Woofer Composition |
Polypropelene |
Mica-reinforced polypropylene |
Woofer Surround Material |
Rubber |
Butyl rubber |
Tweeter Size |
1" |
1" |
Tweeter Type |
dome |
Dome |
Aimable Tweeter |
No |
No |
Midrange Driver |
4.5" |
No |
Crossover Frequency |
n/a |
2500Hz |
Firing Direction |
n/a |
bottom |
Physical Specs |
|
|
Height |
993.0mm (39.1") |
951.0mm (37.4") |
Width |
281.0mm (11.1") |
262.0mm (10.3") |
Depth |
351.0mm (13.8") |
281.0mm (11.1") |
Weight |
16.36kg (36lbs) |
14.50kg (31.9lbs) |
Enclosure |
Passive Radiator |
Bass Reflex |
Finish |
MDF/Aluminum/Cloth |
Meddite MDF |
Available Colors |
Black |
Black |
Grille |
n/a |
Yes |
Moisture Resistancy |
No |
No |
Connections |
|
|
Biamp Inputs |
No |
Yes |
Other |
|
|
Parts Warranty |
5 Years |
5 Years |
Labor Warranty |
5 Years |
5 Years |