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Buchardt S400 MKII Review
Buchardt S400 MKII

Main Features

  • 0.74" aluminum waveguide Tweeter
  • 6" paper Woofer
  • One 5x8-inch Passive Radiators
  • 33-40k HZ Frequency Response
  • 88 dB Sensitivity
  • Impedance: 4ohms
  • Power Range: 40-200watts
  • Weight:16.50 lbs / 7.50 kg
  • Dimensions(HxWxD): 14.4"x7"x11" / 365.0 x 180.0 x 280.0mm

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Buchardt S400 MKII Review
Buchardt S400 MKII Buchardt S400 MKII
See at AMAZON

Buchardt S400 MKII is a 2-way Passive Passive Radiator Bookshelf speaker by Buchardt. It features a 0.74" aluminum waveguide Tweeter and 1 x 6" paper Woofer. S400 MKII also employs one 5x8-inch passive radiators. The speaker has a frequency range of 33-40k HZ and a sensitivity of 88 dB. Buchardt S400 MKII has an MSRP of 2200$ per pair.

Room Size Suitability

The size of the room where you plan to use the Buchardt S400 MKII is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:

Listening Environment* Suitability
Near-fieldPoor
Small RoomAverage
Mid-size RoomGood
Large RoomAverage
Very Large RoomPoor

(* 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.)

Buchardt replaced the older S400 with this model. Follow the link to read our detailed comparison of these models:
Compare Buchardt S400 MKII vs Buchardt S400
Buchardt S400 MKII  Lifestyle
Buchardt S400 MKII Lifestyle

Buchardt's Passive Series of Loudspeakers

S400 MKII is a member of Buchardt's Passive series of Passive speakers. Below you can see the main specs of these speakers.

Buchardt Passive Series Speakers
Model Frequency SensitivityImpedance Woofer
Buchardt E50
Compare
36-30k Hz 85 dB4Ω 1 x 6.5"
Buchardt S400 MKII
33-40k Hz 88 dB4Ω 1 x 6"
Buchardt P300
Compare
37-40k Hz 86 dB4Ω 1 x 6"
Buchardt S400
Compare
33-40k Hz 88 dB4Ω 1 x 6"


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.

Frequency Response of the Buchardt S400 MKII Speaker

Buchardt S400 MKII has a Frequency response range of 33-40k HZ at ±3dB and Power Range of 40-200 watts. With a minimum frequency of 33 Hz, S400 MKII delivers deep bass that will likely satisfy most listeners, especially those who enjoy music. However, movie enthusiasts and music fans who prefer a full range of sound may still benefit from adding a subwoofer.

To focus on the subwoofers that are in a similar price range with Buchardt S400 MKII, check out the Powered Subwoofers under $3000. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how S400 MKII's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
Bookshelf Speakers
Buchardt S400 MKII
Min
Average
Max
High Frequency
Bookshelf Speakers
Buchardt S400 MKII
Min
Average
Max

Crossover frequency of the Buchardt S400 MKII?

The Crossover frequency of the S400 MKII is set to 1800Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.

Buchardt S400 MKII Crossover
Buchardt S400 MKII Crossover is set to 1800Hz

Impedance and Sensitivity

Buchardt S400 MKII's nominal impedance level is 4 ohms and has a sensitivity of 88 dB.

Sensitivity
Bookshelf Speakers
Buchardt S400 MKII
Min
Average
Max

Nominal Impedance of the 4 Ohms means that the Buchardt S400 MKII is a difficult to drive speaker from nominal Impedance perspective, make sure that you choose an amplifier than can provide 4 Ohms for this speaker.
Many AVRs (audio/video receiver) in the market may have difficulty when the speakers dip below the 4 Ohms levels (this may cause clipping or even physical damage), so we recommend to not pair the Buchardt S400 MKII with an AVR but use an Integrated Amplifier instead.

Sensitivity

88dB of the Buchardt S400 MKII is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise.

Check the amplifiers that are in a similar price range to the Buchardt S400 MKII:

  • Integrated Amps under 2000 USD
  • Integrated Amps under 3000 USD
  • Integrated Amps under 5000 USD
  • All Integrated Amplifiers

Input Type

S400 MKII features type connectors. Bi-amping and Bi-wiring are not possible.
Buchardt S400 MKII Back View
Buchardt S400 MKII Back View

Buchardt S400 MKII External Dimensions and Weight

Buchardt S400 MKII has external dimensions of (Height x Width x Depth) 14.4 x 7 x 11inch (365.0 x 180.0 x 280.0mm ).

Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited. The base area of Buchardt S400 MKII is approximately 504.0cm2 / 78.1inch2.

To get a better perspective on the real life size of Buchardt S400 MKII, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).

Buchardt S400 MKII Real Life Body Size Comparison
Buchardt S400 MKII Speaker Size Compared to a Compact Disc

Here we place the Buchardt S400 MKII virtually next to a standard width amplifier and turntable on a BDI Octave Media Cabinet to get a better idea about the size.

Buchardt S400 MKII placed next to an amplifier and turntable
Buchardt S400 MKII Speaker next to an amplifier and turntable

Weight

The Buchardt S400 MKII weighs 7.50kg / 16.5lbs per piece. Here is a comparison of how S400 MKII's weight compares with the average, max and min weights in its class.

Weight
All Bookshelf Speakers
Buchardt S400 MKII
Min
Average
Max
Weight
Bookshelf Speakers under $3000
Buchardt S400 MKII
Min
Average
Max

How does the Buchardt S400 MKII compare to the Buchardt E50?

One of the natural alternative to the Buchardt S400 MKII is the E50 which is located one step higher in Buchardt's Passive Bookshelf selection.

Here is a scaled size comparison of these two speakers to give you an idea how their external dimensions compare:

Buchardt S400 MKII vs Buchardt E50 Size Comparison - Front View
Comparison image of Buchardt S400 MKII and Buchardt E50 Size and External Dimensions

Check the Detailed Comparison of Buchardt S400 MKII vs E50 for more details.

Cabinet type and Materials

Buchardt S400 MKII has a Passive Radiator type cabinet.

Available colors

Buchardt S400 MKII is available in Black, White, Walnut, Rosewood and Light Oak.

Wall Mounting

S400 MKII doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.

Speaker Stands

Buchardt sells a dedicated speaker stand for the S400 MKII with a model name Buchardt Stands. You can check the latest price and availability of these stands at B&H PHOTO and Amazon.

Buchardt Stands for Buchardt S400 MKII
Buchardt Stands Speaker Stands for Buchardt S400 MKII

Does the Buchardt S400 MKII come with a Grille?

S400 MKII comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.

Buchardt S400 MKII  with Grille
Buchardt S400 MKII with Grille

Recommended Accessories

Here is a list of accessories that we think you may need for the Buchardt S400 MKII.

  • Speaker Cable and Connectors
    • Speaker Cables with Banana Plugs: If you know the lenght of the cable you need, this is the easier option to connect your speakers with your amp.
    • Speaker Cables without Connectors: If you are not sure about the lenght or need longer than standard cables with plugs, choose this option.
    • Banana Connectors and Plugs: If you chose the cables without connectors option or already have some cable around, pick the banana plugs separately.
  • Vibration Isolators: IsoAcoustics isolators more affordable options too.
  • Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
  • Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.

Sales, Return and Warrant Policy

Buchardt sells its speakers only via its official website and doesn't use any dealers. Eliminating the middleman helps the company to keep the costs down. Shipping is free anywhere in the world (including all tax and import costs) for orders over 850 Euros. They have a 45-days return period, you can decide to return the product for any reason but there is a 100/200 Euro return fee (Please check their official website for most up to date information).

Official Product Page

Official manufacturer's product page for the Buchardt S400 MKII speaker can be found below:
Official Product Page for Buchardt S400 MKII

Warranty

10 years of parts warranty and 10 years of labor warranty is generally provided by the manufacturer.

Buchardt S400 MKII Alternatives in Passive Bookshelf Speakers
Model Type Sensitivity Impedance Frequency
KEF R3
Compare
3-way 87 dB 8 ohms 52-28k Hz
Dynaudio Evoke 20
Compare
2-way 86 dB 6 ohms 40-23k Hz
Buchardt S400
Compare
2-way 88 dB 4 ohms 33-40 kHz
KEF R3 Meta
Compare
3-way 87 dB 4 ohms 58-28k Hz
Wharfedale LINTON
Compare
3-way 90 dB 6 ohms 40-20k Hz
Buchardt P300
Compare
2-way 86 dB 4 ohms 37-40k HZ
KEF LS50 Meta
Compare
2-way 85 dB 8 ohms 79-28k Hz
B&W 705 S2
Compare
2-way 88 dB 8 ohms 50-28k Hz
Frequently Asked Questions about Buchardt S400 MKII
What is the External Dimensions of Buchardt S400 MKII
What is the Speaker Sensitivity of Buchardt S400 MKII
is the Buchardt S400 MKII an easy to drive speaker?

Buchardt S400 MKII Detailed Specifications

General
BrandBuchardt
Full Model NameBuchardt S400 MKII
Speaker Type2-way Bookshelf
Power Range40-200 watts
Sensitivity88 dB
Impedance4 ohms
Frequency Response33-40k HZ
DRIVERS
Woofer Size6-inch
Woofer Compositionpaper
Tweeter Size0.74-inch
Tweeter Typealuminum waveguide
Crossover freq1800Hz

CONNECTIONS
PHYSICAL SPECS
Height365.0mm ( 14.4-inch)
Width180.0mm ( 7-inch)
Depth280.0mm ( 11-inch)
Height365.0mm ( 14.4-inch)
Weight7.50kg ( 16.50 lbs)
EnclosurePassive Radiator
Available ColorsBlack, White, Walnut, Rosewood, Light Oak
Mounting BracketNo
GrilleYes
Moisture ResistanceNo
OTHER
Handheld RemoteNo
Parts Warranty10 years
Labor Warranty10 years
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