QSC KS118
A powered subwoofer, 1 x 18 in cone, direct radiating. The figures below have not yet been checked against the datasheet.
Unverified data. Entered from the manufacturer’s page. Check the datasheet before relying on it.
Place it in the plannerSpecifications used
| Maximum level | 136 dB peak at 1 m |
|---|---|
| Power | 3600 W (Class D amplifier, peak) |
| Pattern | omni |
| Frequency range | 35 Hz to ? Hz (-10 dB points (-6 dB range also printed); upper -10 dB point 111 Hz) |
| Weight | 47 kg |
| Size (w × h × d) | 520 × 640 × 785 mm |
| Source | Manufacturer page (2026-10-10) |
How the level was stated. Measured on-axis at 1 m, pink noise, 10 dB crest factor, unweighted (per page footnote).
Notes. Page says omni-directional or cardioid modes (cardioid needs minimum 2 units); a single unit is recorded as omni. No pole socket listed on the unit (only optional poles). Weight includes casters. Dimensions labelled H x W x D.
What the figures mean at distance
Taking 136 dB at 1 m on axis and the free-field rule of 6 dB lost per doubling of distance, this is the most the speaker can reach at each distance. A real room adds reflections, and a speaker is not normally run at its maximum.
| Distance | Level on axis |
|---|---|
| 2 m | 130.0 dB |
| 5 m | 122.0 dB |
| 10 m | 116.0 dB |
| 15 m | 112.5 dB |
| 20 m | 110.0 dB |
See level and distance and coverage angles for how these are worked out.
Planning estimate only. The calculation ignores reverberation, reflections and room modes. See terms and disclaimer.