6.5" Round Bolt-On Horn Diffuser

If you're running 6.5” midrange loudspeakers, DS18’s PRO-SDF6R is your secret weapon for sharper projection and cleaner vocals. This round bolt-on horn diffuser upgrades your front stage with a wide 90° dispersion, giving your mids the focus and range they’ve been missing.

Built for the Culture
Made from tough ABS with a clean matte black finish, the PRO-SDF6R adds an aggressive look to your setup—perfect for show builds or open-air street systems where every decibel counts.

Drop-In, Bolt-On
Designed for easy bolt-on installation, the PRO-SDF6R fits any standard 6.5" midrange speaker with matching bolt patterns (6.26"/159mm speaker pattern, 8"/205mm horn flange). It’s a direct performance upgrade for DS18 PRO-X, PRO-GM, or any comparable 6.5” loudspeaker that needs better throw.

Specifications

Nominal Speaker Diameter: 6.5" / 165mm
Nominal Horn Size: 8.6" / 220mm
Throat Diameter: 4" / 101mm
Installation Type: Bolt-On
Sound Coverage: 90°
Body Material: ABS
Color: Black Matte
Sold as: Single

Measurement

Overall Diameter: 8.66" / 220mm
Overall Depth: 5.2" / 132mm
Mounting Depth: 4.8" / 122mm
Mounting Hole Diameter: 6.8" / 175mm
Bolt Pattern (Horn): 8" / 205mm