Buchardt S400 Generations: Every Model Compared

Last updated: October 9, 2026

The Buchardt S400 line on Speaker Ranking spans 3 generations and 3 models, from the Buchardt Audio S400 to the Buchardt S400 MK3. Ratings run from 3.8/5 to 4.4/5. Only one of them is still sold.

Each column below is one generation, oldest on the left. Each row follows one model into the model that replaced it; a long arrow means a model skipped a generation. Ratings are out of 5, and an estimated rating comes from measured models in the same family.

More from this brand: every Buchardt speaker ranked.

Generation by generation

Audio S400 to S400 MKII

The Buchardt S400 MKII replaced the Buchardt Audio S400. It rates lower, 3.8/5 against 4.4/5.

Spec Audio S400 S400 MKII
Drivers 0.74” waveguided tweeter; 6” aluminum woofer 6.5” aluminum cone woofer, 1” soft dome tweeter
Sensitivity Approximately 86dB/2.83V/1m 84.7dB
Bass Extension (-3dB) 53Hz 59Hz
Weight 16.1 lbs (7.30 kg) each 16.5 lbs (7.5 kg) each

S400 MKII to S400 MK3

The Buchardt S400 MK3 replaced the Buchardt S400 MKII. It rates higher, 4.0/5 against 3.8/5.

Spec S400 MKII S400 MK3
Drivers 6.5” aluminum cone woofer, 1” soft dome tweeter 1” aluminum dome tweeter in waveguide, 7.5” Satori Papyrus paper cone woofer
Sensitivity 84.7dB 87dB anechoic, 90dB in-room
Weight 16.5 lbs (7.5 kg) each 18.7 lbs (8.5 kg) each

Full S400 MKII vs S400 MK3 comparison

Frequently Asked Questions

How many generations of the Buchardt S400 are there?

Speaker Ranking covers 3 generations of the Buchardt S400, from the Buchardt Audio S400 to the Buchardt S400 MK3.

What replaced the Buchardt Audio S400?

The Buchardt S400 MKII replaced the Buchardt Audio S400. It is rated 3.8/5, against 4.4/5 for the Buchardt Audio S400.

What replaced the Buchardt S400 MKII?

The Buchardt S400 MK3 replaced the Buchardt S400 MKII. It is rated 4.0/5, against 3.8/5 for the Buchardt S400 MKII.