In this review, we will be comparing Alpha P5 and Alpha AM3, two Bookshelf speakers by PSB The main difference between these two speakers is that the PSB Alpha AM3 is a Powered speaker which means that it has a built-in amplifier inside the speaker body so you don't need an external power amp or an integrated amp whereas the PSB P5 is a Passive speaker so has to be matched with an amplifier to get any sound from it. Let's have a brief look at the main features
of PSB P5 and PSB Alpha AM3 first before getting into our more
detailed comparison.
PSB P5 Key Specs
- 2-way Design
- 0.75" Hard-Dome Tweeter
- 5.25" Polypropylene Woofer
- 55-21k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:10-90watts
- Weight:4.61kg
- Dimensions (H x W x D): 289.0" x 6-3/4" x 10"( 289.0 x 172.0 x 254.0mm )
PSB Alpha AM3 Key Specs
- 2-way Design
- 70-watt RMS Integrated Amplifier
- 0.75" Hard-Dome Tweeter
- 4" Polypropylene Woofer
- 56-20k Hz Frequency Response
- 24-bit Max Depth / 48 kHz Max Sample Rate
- Built-in 5.0 Bluetooth
- Weight:4.50kg
- Dimensions (H x W x D): 220.7" x 5.1875" x 8.125"( 220.7 x 131.8 x 206.4mm )
Alpha P5 and Alpha AM3 are members of PSB's Alpha series of speakers. Below you can find the loudspeakers from this series.
In the following sections, we will get into more detail in order to better understand how the PSB P5 and PSB Alpha AM3 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 P5 and Alpha AM3 are 2-way speakers.
| Driver |
PSB P5 |
PSB Alpha AM3 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.75-inch
|
0.75-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5.25-inch
|
1 x 4-inch
|
Alpha P5 features a 0.75" anodized aluminum Hard-Dome Tweeter and 1 x 5.25" Polypropylene Woofer with a Crossover frequency at 2500Hz. On the other hand, the Alpha AM3 features a 0.75" Aluminum Hard-Dome Tweeter and 1 x 4" Polypropylene Woofer .
Frequency Response
Alpha P5 has a frequency range of 55-21k Hz whereas Alpha AM3 has a frequency range of 56-20k Hz. With a minimum frequency of 55Hz, the Alpha P5 can go slightly deeper then the Alpha AM3's min frequency of 56Hz.
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.
Cabinet Type and Port Position
Both Alpha P5 and Alpha AM3 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 PSB P5's and PSB Alpha AM3's external dimensions. PSB P5 has external dimensions of 289.0 x 172.0 x 254.0mm ( 11-3/8 x 6-3/4 x 10inch) whereas PSB Alpha AM3 has external dimensions of 220.7 x 131.8 x 206.4mm ( 8.6875 x 5.1875 x 8.125inch) .
PSB P5 is clearly the larger of the two speakers. Its body is 40.2mm wider, 68.3mm taller and 47.6mm deeper than PSB Alpha AM3.
Below you can see the front view size comparison of PSB P5 and PSB Alpha AM3 in scale.
Comparison image of PSB P5 and PSB Alpha AM3 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 P5 is approximately 436.9cm2 / 67.7inch2 and base area of the PSB Alpha AM3 is approximately 272.0cm2 / 42.2inch2. The Alpha P5 requires 61% more surface area than the Alpha AM3 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:
Size Comparison image of PSB P5 and PSB Alpha AM3 on a Media Console
What's in the Box of PSB P5?
Here are the items that are included inside the box of Alpha P5:
2 Bookshelf loudspeakers 2 Grilles 8 Self-adhesive rubber feet Quick Start Guide Warranty Card
What's in the Box of PSB Alpha AM3?
Here are the items that come with the Alpha AM3:
Powered speaker Passive speaker 2 Grilles AC power adapter (attached 45-inch DC cord) 4-feet AC power cord Remote control (PSR-1) 2 AAA batteries 8-feet Speaker cable 58-inch Stereo minijack cable 8 Self-adhesive rubber feet Connection Diagram Warranty Card
Woofer Size 
High Frequency Response 
Speaker Type 
Height 
Base Surface Area 
3.5mm Connection