In this review, we will be comparing Passif 50 and S400 MKII, two Passive Bookshelf speakers from PSB and Buchardt.
Let's have a brief look at the main features
of PSB Passif 50 and Buchardt S400 MKII first before getting into our more
detailed comparison.
PSB Passif 50 Key Specs
- 2-way Design
- 1" Dome Tweeter
- 6.5" cast aluminum basket, paper cone Woofer
- 50-20k Hz Frequency Response
- 87 dB Sensitivity
- Impedance: 6ohms
- Power Range:30-200 Wattswatts
- Weight:13.70kg
- Dimensions (H x W x D): 660.0" x 11" x 10"( 660 × 280 × 254mm )
Buchardt S400 MKII Key Specs
- 2-way Design
- 0.74" aluminum waveguide Tweeter
- 6" paper Woofer
- 33-40k HZ Frequency Response
- 88 dB Sensitivity
- Impedance: 4ohms
- Power Range:40-200watts
- Weight:7.50kg
- Dimensions (H x W x D): 365.0" x 7" x 11"( 365.0 x 180.0 x 280.0mm )
What size room are the PSB Passif 50 and Buchardt S400 MKII 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 Passif 50 |
Buchardt S400 MKII |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| 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 Passif 50 and Buchardt S400 MKII 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 Passif 50 and S400 MKII are 2-way speakers.
| Driver |
PSB Passif 50 |
Buchardt S400 MKII |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
0.74-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6-inch
|
Passif 50 features a 1" titanium dome with ferrofluid and neodymium magnet Dome Tweeter and 1 x 6.5" cast aluminum basket, paper cone Woofer with a Crossover frequency at 1800Hz. On the other hand, the S400 MKII features a 0.74" fine weave soft fabric textile aluminum waveguide Tweeter and 1 x 6" paper Woofer with a Crossover frequency at 1800Hz.
Frequency Response
Passif 50 has a frequency range of 50-20k Hz whereas S400 MKII has a frequency range of 33-40k HZ. With a minimum frequency of 33Hz, the S400 MKII can go significantly deeper on the low side and provide stronger bass compared to the Passif 50's min frequency of 50Hz.
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
Passif 50 is a 6 ohms speaker compared to the S400 MKII which has a nominal impedance of 4 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the S400 MKII can provide this impedance level.
These two speakers also have different sensitivity levels. Passif 50 sensitivity is rated at 87 dB and the S400 MKII's is rated at 88 dB. This 1 dB difference makes the PSB Passif 50 a more sensitive speaker compared to Buchardt S400 MKII, 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.
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.
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 Passif 50's and Buchardt S400 MKII's external dimensions. PSB Passif 50 has external dimensions of 660 × 280 × 254mm ( 26 x 11 x 10-inch) whereas Buchardt S400 MKII has external dimensions of 365.0 x 180.0 x 280.0mm ( 14.4 x 7 x 11inch) .
Buchardt S400 MKII is 100mm narrower and 295mm shorter than PSB Passif 50 but it is also 26mm deeper.
Below you can see the front view size comparison of PSB Passif 50 and Buchardt S400 MKII in scale.
Comparison image of PSB Passif 50 and Buchardt S400 MKII 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 Passif 50 is approximately 712.0cm2 / 110.4inch2 and base area of the Buchardt S400 MKII is approximately 504.0cm2 / 78.1inch2. The Passif 50 requires 41% more surface area than the S400 MKII which gives it a small disadvantage on placement in tight spaces.