Mackie Thump18Sv4
A powered subwoofer, 1 x 18 in woofer. 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 | 132 dB at 1 m |
|---|---|
| Power | 1400 W (Class-D amplifier rating as printed; peak/RMS not stated) |
| Pattern | omni (assumed: the source does not say) |
| Frequency range | 33 Hz to ? Hz (Only a low-frequency performance figure is printed (not a -3/-10 dB range); upper limit and tolerance not stated) |
| Weight | 31.9 kg |
| Size (w × h × d) | 630 × 541 × 605 mm |
| Pole socket | Yes |
| Source | Manufacturer page (2026-10-10) |
How the level was stated. Page says 132 dB maximum SPL; distance and conditions not stated
Notes. Product page only (spec sheet PDF not read). M20 thread for SPM400 pole (pole sold separately).
What the figures mean at distance
Taking 132 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 | 126.0 dB |
| 5 m | 118.0 dB |
| 10 m | 112.0 dB |
| 15 m | 108.5 dB |
| 20 m | 106.0 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.