The Biamp Desono COLS81 (910-01589) is an extra-slim passive column loudspeaker with eight 2 inch drivers and a high-frequency dome, rated IP66 for outdoor use. A terminal-block tap selects 70V/100V or 16 ohm low impedance operation. Supplied with adjustable tilt L-brackets and two IP66 gland nuts.
Key Features
Eight 2 inch (51 mm) coated paper cone LF drivers
One 1 inch (25 mm) soft dome HF driver
IP66 rated for outdoor installation
Selectable 70V/100V or 16 ohm low impedance
70V taps: 30W, 15W, 7.5W, 3W
100V taps: 30W, 15W, 7.5W
120 degrees x 15 degrees coverage
Adjustable tilt L-bracket included
Two IP66 water-tight gland nuts included
5-year warranty
Specifications
| Type | T-way 8 x 2-inch column loudspeaker |
| Operating Mode | Passive |
| Drivers | LF 8 x 2 inches; HF 1 x 1 inch |
| Power | 30W continuous; 120W peak |
| Transformer | 70V: 30W, 15W, 7.5W, 3W; 100V: 30W, 15W, 7.5W |
| Impedance | 16Ω |
| Frequency range | 185 Hz to 22 kHz |
| Sensitivity | 89 dB (1W/1m) |
| Maximum Output | Max Output @1m: 104 dB; 110 dB peak |
| Dispersion | (H x V) 120° x 15° |
| Recommended amplifier | 30W to 60W @ 16Ω (22V to 31V) |
| Connectivity | Multi-position pass-through, screw-down terminal block |
| Control | None; select transformer tap or low impedance input via terminal block wiring |
| IP rating | IP66 per IEC 60529 |
| Operating Environment | Indoor / Outdoor |
| Mounting | Adjustable tilt L-bracket |
| Included Accessories | L-brackets and 2x IP66 water-tight gland nuts (included).; COLSBRA: pan/tilt mounting bracket |
| Material | Grille: Aluminium White (RAL 9016) finish; Enclosure / Finish: Aluminium, matte finish, White |
| Finish | White, RAL 9016 |
| Dimensions | 614 x 66 x 66 mm (H x W x D) |





