User Guide
SPECIFICATIONS
18
OS 7.5 Loudspeaker
Driver Complement
• 7" carbon-weave 
polypropylene woofer
• 1" Teteron dome tweeter 
with fluid cooling
Recommended 
Amplifier Power
5 to 150 watts per channel
Nominal Impedance
8 ohm
Frequency Response
60 Hz to 23 kHz, +/- 3 dB
Sensitivity
91 dB with 2.83 V pink noise 
input, measured at 1 meter 
on axis
Wiring Requirements 
We recommend using 16- to 
18-gauge speaker wire for 
runs up to 80 feet (24.38 
meters) and 14-gauge 
speaker wire for runs up to 
200 feet (60.96 meters). The 
connectors will accommodate 
12- to 22-gauge wire.
Dimensions (Loudspeaker 
with U-Bracket) 
8-3/16" x 13-5/16" x 9-3/16" 
(20.8cm x 33.8cm x 23.3cm)
Weight (Loudspeaker and 
Bracket) 
23 lb per pair (10.4 kg)
OS 6.5 Loudspeaker
Driver Complement
• 6" carbon-weave 
polypropylene woofer
• 1" Teteron dome tweeter 
with fluid cooling
Recommended 
Amplifier Power
5 to 125 watts per channel
Nominal Impedance
8 ohm
Frequency Response
70 Hz to 23 kHz, +/- 3 dB
Sensitivity
90 dB with 2.83 V pink noise 
input, measured at 1 meter 
on axis
Wiring Requirements
We recommend using 16- to 
18-gauge speaker wire for 
runs up to 80 feet (24.38 
meters) and 14-gauge 
speaker wire for runs up to 
200 feet (60.96 meters). The 
connectors will accommodate 
12- to 22-gauge wire.
Dimensions (Loudspeaker 
with U-Bracket) 
7-7/16" x 12" x 7-3/4" 
(18.9cm x 30.5cm x 19.7cm)
Weight (Loudspeaker and 
Bracket) 
18 lb per pair (8.2 kg)
OS 5.5 Loudspeaker
Driver Complement
• 5" carbon-weave 
polypropylene woofer
• 1" Teteron dome tweeter 
with fluid cooling
Recommended 
Amplifier Power
5 to 100 watts per channel
Nominal Impedance
8 ohm
Frequency Response
95 Hz to 23 kHz, +/- 3 dB
Sensitivity
90 dB with 2.83 V pink noise 
input, measured at 1 meter 
on axis
Wiring Requirements 
We recommend using 16- to 
18-gauge speaker wire for 
runs up to 80 feet (24.38 
meters) and 14-gauge 
speaker wire for runs up to 
200 feet (60.96 meters). The 
connectors will accommodate 
12- to 22-gauge wire.
Dimensions (Loudspeaker 
with U-Bracket)
6-1/4" x 9-7/8" x 6-3/4" 
(15.9cm x 25.1cm x 17.1cm)
Weight (Loudspeaker and 
Bracket) 
12 lb per pair (5.4 kg)










