2-way 5-1/4-inch floorstanding loudspeaker. HS 450 speakers pack a lot of technology into their trim exteriors. MBOS (Maximum Bass Output System) uses passive radiators and a rear port to improve bass performance — without the audible noise of a port alone. Proprietary Deep Channel® Design (DCD) poly cones with phase plugs deliver smooth, consistent response at any output level. Front baffles are gently curved. And the cabinets themselves are heavily braced to reduce unwanted resonances. The combined result is the natural, captivating sound you expect from Boston, with clean, contemporary style. They are available in Mist (off-white) or Midnight (dark gray) with optional color grilles that are sure to complement your décor!

• Dual 5-1/4-inch woofers with dual 6-1/2-inch passive radiators
• 1-inch Kortec© soft dome tweeter
• Deep ChannelTM Design (DCD) for more bass from less amplifier power
• MBOS (Maximized Bass Output System) for improved bass acoustics
• Reduced Baffle Diffraction Design (RBDD) for wider, smoother dispersion
• Adjustable footings
• 5-way gold-plated binding posts

Recommended Amplifier Power
15-200 watts

Nominal Impedance
8 ohms

Frequency Response (±3dB)
46Hz-25kHz

Bass Unit
Dual 5-1/4" (133mm) plus MBOS Rear Port

Passive Radiators
Dual 6-1/2" (165mm) copolymer

Crossover Frequency
2600Hz

Dimensions (HxWxD)
39-3/8 x 10-7/8 x 8-11/16" (999 x 275 x 221mm)

Finish
Midnight with onyx grilles or Mist with silver grilles

Sensitivity (1 watt (2.83v) at 1m)
89dB

Tweeter
1" (25mm) Kortec soft dome

Weight
19.8 lbs (8.9kg)

"The Horizon series is a youthful looking package that is complete from small bookshelf units to full size floorstanding speakers and subwoofers. Very nicely engineered, the bookshelf units can be stand or wall mounted, or literally sit on your shelf." - Secrets of Home Theater and High Fidelity, March 2008