https://www.soundimports.eu/nl/grs-6smp-4.html
6SMP-4 4" Surface Mount Poly Cone Bass-midwoofer - SoundImports
The GRS 6SMP-4 is a robust 6-1/2" poly cone woofer optimized for surface mounting. With strong midbass performance, extended excursion, and smart thermal featur
surface mountpolyconebassmidwoofer
https://www.vincarteam.com/tag-prodotto/midwoofer/
midwoofer Archivi | Vincarteam
midwooferarchivi
https://www.audiokit.it/gb/seas-loudspeakers-midwoofer-prestige-series/281466-seas-prestige-midwoofer-er18rnx-h1456-midwoofer.html
seas midwoofer
SEAS Prestige Midwoofer ER18RNX (H1456) midwoofer
seasmidwoofer
https://www.marmotive.com/vibe-cven6w-v4.htm
VIBE CVEN6W-V4 High-End Midwoofer | 6.5" Audiofiele Speaker met Geavanceerde Motor - MarMotive
VIBE CVEN6W-V4 High-End Midwoofer | 6.5" Audiofiele Speaker met Geavanceerde Motor - MarMotive