RCF SUB 708-AS II
A powered subwoofer, 1 x 18 in woofer (3.0 in v.c.), bass reflex. 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 | 133 dB at 1 m |
|---|---|
| Power | 700 W (RMS (total); 1400 W peak also printed) |
| Pattern | omni (assumed: the source does not say) |
| Frequency range | 35 Hz to ? Hz (low-pass end 120 Hz (range as printed; no tolerance stated); upper limit omitted from freqHigh because the validator requires >=1000 Hz) |
| Weight | 37.8 kg |
| Size (w × h × d) | 505 × 665 × 700 mm |
| Pole socket | Yes |
| Source | Manufacturer page (2026-10-10) |
How the level was stated. Printed as Max SPL @ 1m; no other conditions (noise type, crest factor) stated on the page.
Notes. Page is labelled ARCHIVED with a New Model link to SUB 708-AS MK3, so the II is superseded. No cardioid or directional statement on page. Crossover on page: HP 110 Hz, LP 80 Hz.
What the figures mean at distance
Taking 133 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 | 127.0 dB |
| 5 m | 119.0 dB |
| 10 m | 113.0 dB |
| 15 m | 109.5 dB |
| 20 m | 107.0 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.