Just a few more (including some real gems):
Brodmann (formerly Bösendorfer), passive speakers from Austria:
http://www.brodmann.at/
Graham Audio, passive speakers from the UK:
https://www.grahamaudio.co.uk/
Audiodata, passive speakers from Austria:
https://www.audiodata.com/
Raidho Acoustics, passive speakers from Denmark:
http://raidho.dk/
Franco Serblin, passive speakers from Italy:
http://www.francoserblin.it/
MBL Akustikgeräte, passive speakers from Germany:
https://www.mbl.de/
Lansche Audio, passive speakers from Germany:
https://www.lansche-audio.com/
hORNS and 5° (5degrees), passive speakers from Poland:
http://horns.pl/en/
Kawero! (Kaiser Acoustics), passive speakers from Germany:
https://www.kaiser-acoustics.com/
Qln, passive loudspeakers from Sweden:
https://qln.se/
Sveda Audio, active and passive loudspeakers from Poland:
http://www.sveda-audio.com/index_en.html
Ayon Audio, passive loudspeakers from Austria:
https://www.ayonaudio.com/
Blumenhofer Acousticsa, passive loudspeakers from Germany:
https://www.blumenhofer-acoustics.com/
FISCHER & FISCHER, passive loudspeakers from Germany:
https://fischer-fischer.de/en/
Opera Loudspeakers, passive loudspeakers from Italy:
http://www.operaloudspeakers.com/en/
Gradient loudspeakers, passive loudspeakers from Finland:
https://www.instagram.com/gradientofficial/ website down (
https://web.archive.org/web/20170706111154/http://www.gradient.fi/Gradient/Home.html)
INKLANG Lautsprecher Manufaktur, passive loudspeakers from Germany:
https://www.inklang.de/de/
Zu Audio, passive loudspeakers from the US:
https://www.zuaudio.com/
AUDIUM, active and passive loudspeakers from Germany:
http://en.audium.com/ and
https://www.audium.com/index.php
Naim Audio, passive loudspeakers from the UK:
https://www.naimaudio.com/
Spatial Audio, passive loudspeakers from the US:
http://www.spatialaudio.us/
REL Acoustics, active subwoofers from the US:
https://rel.net/
Omega Speaker Systems, passive loudspeakers from the US:
https://omegaloudspeakers.com/
Eden Acoustique, active and passive loudspeakers from Canada:
http://www.edenacoustics.com/
B&M Backes und Müller, active loudspeakers from Germany:
https://backesmueller.de/en/
KS Digital, active loudspeakers from Germany:
https://www.ksdigital.de/
Martion Audiosysteme, active and passive loudspeakers from Germany:
http://martion.de/en/