System Power
800 W
Mains
4
Subs
1
Total Units
5
Recommended System Power
800 W
Main Speakers
4
Subwoofers
1
Total Units
5
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Inputs
Result
150 guests × 5W × 1.0 = 750W, rounded to 800W. Mains: ceil(800/500)×2 = 2. Subs: ceil(800×0.5/500) = 1. No delays (under 5,000 sq ft).
Inputs
Result
300 × 8W × 1.3 = 3,120W → 3,200W. Mains: ceil(3200/500)×2 = 14 → but min 2 always in pairs = 8. Subs: ceil(3200×0.7/500) = 5. Monitors: 4 (band). Delays: 2 (over 5000 sq ft).
Plan 5–12 watts per person depending on venue type and event style. Indoor events with low ceilings need about 5W per person, while outdoor open-air events need 12W. A dance party for 150 people indoors needs about 750W total system power.
| Guests | Indoor | Outdoor Tent | Open Air |
|---|---|---|---|
| 50 | 250W | 400W | 600W |
| 100 | 500W | 800W | 1,200W |
| 200 | 1,000W | 1,600W | 2,400W |
| 500 | 2,500W | 4,000W | 6,000W |
For most events, you need 2 main speakers (one per side of the stage/DJ booth) plus 1 subwoofer per 500 watts of system power. A 150-person indoor dance party needs 2 main speakers and 1–2 subwoofers. Add stage monitors for live bands (2 minimum) and delay stacks for venues over 5,000 sq ft.
Yes, for any event with music — especially dance parties and DJ events. Subwoofers handle bass frequencies (under 120 Hz) that main speakers cannot reproduce well. Plan 1 subwoofer per 500 watts of total system power. Without subs, music sounds thin and loses impact.
Add delay stacks when your venue exceeds 5,000 square feet. Sound loses energy over distance — past 80–100 feet from the main speakers, guests at the back will struggle to hear clearly. Add 2 delay speakers (one per side) for every additional 3,000 sq ft beyond 5,000.
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Last Updated: Mar 20, 2026
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