![\"\"](\"https:\/\/darko.audio\/wp-content\/uploads\/2026\/03\/Buchardt-S400-MK3-1.jpeg\")
<\/a><\/p>\nThe tweeter has been overhauled in a similar manner. Where the MK2 used a 19 mm soft dome, the MK3 moves to a custom 26 mm aluminium dome housed in a redesigned 7.5\u2033 aluminium waveguide, crossing over at 2.4kHz via a simplified first-order network. Buchardt says the goal was not to push brightness upward but to improve transient precision and perceived resolution while retaining the fatigue-free character the S400 series has always offered. The crossover, developed in collaboration with Jantzen Audio, continues to specify air-core inductors and polypropylene capacitors throughout.<\/p>\n
The waveguide serves a secondary purpose beyond housing the tweeter: controlled directivity. Buchardt says the MK3 maintains a consistent frequency response both on- and off-axis, which it argues produces more even in-room sound and a wider listening sweet spot \u2013 a characteristic it considers especially useful in untreated rooms.<\/p>\n
On basic specs, the MK3 is almost identical to the MK2 \u2013 4 ohm nominal impedance, 88 dB sensitivity, -3dB at 33Hz \u2013 but the newcomer puts an extra kilo on the scales and recommended amplifier power now starts at 30 watts (down from 40).<\/p>\n
The S400 MK3 is available to pre-order now via a limited campaign of 75 pairs per finish, with estimated delivery slated for late summer 2026. Prices include import costs: black or white finish \u2013 \u20ac2100 (pre-order) \/ \u20ac2300 (standard); real wood veneer \u2013 walnut or natural oak \u2013 \u20ac2250 (pre-order) \/ \u20ac2450 (standard).<\/p>\n
Further information: Buchardt Audio<\/a><\/p>\n