# Buchardt S400 MK3

Bookshelf / standmount passive loudspeaker, made by Buchardt (🇩🇰 DK).

Source: https://truescaleaudio.com/en/speaker/buchardt-s400-mk3
Manufacturer page: https://buchardtaudio.com/collections/passive-speakers/products/s400-mk3

## Dimensions

| Dimension | Metric | Imperial |
| --- | --- | --- |
| Height | 392 mm | 15.4 in |
| Width | 198 mm | 7.8 in |
| Depth | 280 mm | 11 in |
| Weight (each) | 8.5 kg | 19 lb |

## Drivers

- 1 × 26 mm (1 in) tweeter — aluminium dome, custom, neodymium matrix motor, in Buchardt's own waveguide
- 1 × 190 mm (7.5 in) mid-bass — paper cone, 7.5 in. SB Acoustics Satori Egyptian Papyrus with neodymium motor

## Specifications

| Specification | Value |
| --- | --- |
| Type | Bookshelf / standmount |
| Power | Passive |
| Enclosure | Bass reflex, rear port |
| Frequency response | 33–20000 Hz |
| Crossover | 2200 Hz |
| Sensitivity | 87 dB |
| Impedance | 4 Ω nominal |
| Introduced | 2026 |

## About

The third generation of the speaker that made Buchardt's name, and a clean-sheet redesign: the only part carried over from the MK2 is the binding posts. The cabinet grows 18% in volume, the passive radiator that defined the first two generations is gone in favour of a rear port with foam plugs, and the woofer is now a 7.5-inch SB Acoustics Satori Egyptian Papyrus — a driver normally seen in high-end DIY builds — with 65.5% more displacement headroom than before. The tweeter is a new 26 mm aluminium dome sitting in the waveguide Buchardt developed for the original S400 back in 2016, using a Klippel Near Field Scanner, which at the time made it the first commercially sold hi-fi speaker designed that way. Crossover at 2.2 kHz on Jantzen Cross-caps and air-core coils only. €2,300 a pair with shipping, tax and import included; Buchardt sells direct and quotes no US price. The 87 dB figure here is the anechoic one — the page also prints 90 dB in-room.

## See it to scale

This catalogue draws cabinets at their real size side by side, which no text version can reproduce. Compare the Buchardt S400 MK3 against another speaker at https://truescaleaudio.com/en/compare?a=buchardt-s400-mk3