Buchardt S400 is a 2-way Passive Radiator Bookshelf speaker by Buchardt. It was released in 2017. It features a 0.74" aluminum waveguide Tweeter and 1 x 6" paper Woofer. S400 also employs one 5x8-inch passive radiators. The speaker has a frequency range of 33-40 kHz and a sensitivity of 88 dB.
Room Size Suitability
The size of the room where you plan to use the Buchardt S400 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-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | 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.)
Buchardt later replaced S400 with S400 MKII. Follow the link to read our in-depth comparison of these speakers:
Compare Buchardt S400 vs Buchardt S400 MKII
Buchardt S400 Lifestyle
Buchardt's Passive Series of Loudspeakers
S400 is a member of Buchardt's Passive series of Passive speakers. Buchardt's Passive range are traditional passive loudspeakers built with premium drivers and cabinets, sold factory-direct at prices that undercut dealer brands. Below you can see the main specs of these speakers.
See all 6 Buchardt Passive models compared »
Buchardt Passive Series Speakers
Frequency Response of the Buchardt S400 Speaker
Buchardt S400 has a Frequency response range of 33-40 kHz and Power Range of 40-200 watts. With a minimum frequency of 33 Hz, S400 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.
Here we have a comparison of how S400's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Bookshelf Speakers
Thinking about a subwoofer for the Buchardt S400?
Crossover frequency of the Buchardt S400?
The crossover frequency of the S400 is set to 2000Hz. 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.
Impedance and Sensitivity
Buchardt S400's nominal impedance level is
4 ohms and has a sensitivity of
88 dB.
Sensitivity
Bookshelf Speakers
Nominal Impedance of the 4 Ohms means that the Buchardt S400 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 with an AVR but use an Integrated Amplifier instead.
Sensitivity
88dB of the Buchardt S400 is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the Buchardt S400 plays in your room →
Running more than one pair from a single amplifier? Check the load it would present →
What amplifier does the Buchardt S400 need?
At normal listening levels in a medium room, about
24–200 W
per channel into 4 ohms.
Set your own conditions and we will rank every amplifier we cover.
Prefer to browse? See every integrated amplifier we cover.
Input Type
S400 features type connectors.
Buchardt S400 External Dimensions and Weight
Buchardt S400 has external dimensions of (Height x Width x Depth) 14.75 x 7 x 9.6inch (375 x 180 x 245mm ).
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 is approximately 441.0cm2 / 68.4inch2.
To get a better perspective on the real life size of Buchardt S400, let's compare it with a standard size Compact Disc which has a diameter of 4.7inch (120mm).
Buchardt S400 Speaker Size Compared to a Compact Disc
Here we place the Buchardt S400 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 Speaker next to an amplifier and turntable
Find speakers that fit your shelf or alcove → · Work out where they should sit in the room →
WeightThe Buchardt S400 weighs 7.30kg / 16.1lbs per piece. Here is a comparison of how S400's weight compares with the average, max and min weights in its class.
Weight
All Bookshelf Speakers
How does the Buchardt S400 compare to the Buchardt S400 MKII?
One of the natural alternative to the Buchardt S400 is the S400 MKII 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:
Comparison image of Buchardt S400 and Buchardt S400 MKII Size and External Dimensions
Check the Detailed Comparison of Buchardt S400 vs S400 MKII for more details.
Cabinet type and Materials
Buchardt S400 has a
Passive Radiator type cabinet.
Available colors
Buchardt S400 is available in Black, White, Walnut and Graphite Oak.
Wall Mounting
S400 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 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 Speaker Stands for Buchardt S400
Does the Buchardt S400 come with a Grille?
S400 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.
Recommended Accessories
Here is a list of accessories that we think you may need for the Buchardt S400.
- Speaker Cable and Connectors
- Vibration Isolators: IsoAcoustics isolators are our favorite isolators but you may find 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).