In this review, we will be comparing Alpha T20 and S 809, two Passive Floor-standing speakers from PSB and Jamo.
Let's have a brief look at the main features
of PSB Alpha T20 and Jamo S 809 first before getting into our more
detailed comparison.
PSB Alpha T20 Key Specs
- 2-way Design
- 0.75" Dome Tweeter
- 2 x 5.25" Polypropylene Woofer
- 36-21k Hz Frequency Response
- 90 dB Sensitivity
- Impedance: 8ohms
- Power Range:15-120watts
- Weight:11.89kg
- Dimensions (H x W x D): 869.0" x 8-5/16" x 9-13/16"( 869.0 x 212.0 x 250.0mm )
Jamo S 809 Key Specs
- 2-way Design
- 1" Tweeter
- 3 x 5" Aluminized Polyfiber Woofer
- 37-26k Hz Frequency Response
- 90 dB Sensitivity
- Impedance: 8ohms
- Power Range:120watts
- Weight:13.60kg
- Dimensions (H x W x D): 1042.0" x 7.5" x 9.9"( 1042.0 x 191.0 x 252.0mm )
What size room are the PSB Alpha T20 and Jamo S 809 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* |
PSB Alpha T20 |
Jamo S 809 |
| Near-field |
Bad |
Bad |
| Small Room |
Poor |
Poor |
| Mid-size Room |
Good |
Good |
| Large Room |
Good |
Good |
| Very Large Room |
Poor |
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.)
In the following sections, we will get into more detail in order to better understand how the PSB Alpha T20 and Jamo S 809 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 Alpha T20 and S 809 are 2-way speakers.
| Driver |
PSB Alpha T20 |
Jamo S 809 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 5.25-inch
|
3 x 5-inch
|
Alpha T20 features a 0.75" anodized aluminum with front waveguide Dome Tweeter and 2 x 5.25" Polypropylene Woofer with a Crossover frequency at 2500Hz. On the other hand, the S 809 features a 1" Tweeter and 3 x 5" Aluminized Polyfiber Woofer with a Crossover frequency at 2000Hz.
Frequency Response
Alpha T20 has a frequency range of 36-21k Hz whereas S 809 has a frequency range of 37-26k Hz. With a minimum frequency of 36Hz, the Alpha T20 can go slightly deeper then the S 809's min frequency of 37Hz.
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
Alpha T20 and S 809 have the same Impedance of 8 ohms and their sensitivity is also same at 90 dB.
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.
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
Alpha T20 features 5-Way post posts which make bi-amping or bi-wiring possible. S 809 has a Post which doesn't feature bi-amping/bi-wiring.
PSB Alpha T20's 5-Way post terminals allows Bi-amping or bi-wiring
Jamo S 809's Post terminals
Cabinet Type and Port Position
Alpha T20 has a rear firing port whereas S 809 has a front firing ports. Jamo S 809's front-firing port gives more flexibility in placement in regards to proximity to walls compared to PSB Alpha T20 with its rear-firing port.
Jamo S 809 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 PSB Alpha T20's and Jamo S 809's external dimensions. PSB Alpha T20 has external dimensions of 869.0 x 212.0 x 250.0mm ( 34-3/16 x 8-5/16 x 9-13/16inch) whereas Jamo S 809 has external dimensions of 1042.0 x 191.0 x 252.0mm ( 41.0 x 7.5 x 9.9inch) .
PSB Alpha T20 is 173mm shorter and 2mm less deeper than Jamo S 809 but it is also 21mm wider.
Below you can see the front view size comparison of PSB Alpha T20 and Jamo S 809 in scale.
Comparison image of PSB Alpha T20 and Jamo S 809 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 PSB Alpha T20 is approximately 530.0cm2 / 82.2inch2 and base area of the Jamo S 809 is approximately 481.3cm2 / 74.6inch2. The Alpha T20 requires 10% more surface area than the S 809 which gives it a small disadvantage on placement in tight spaces.