What LED wall size works for a 300-person keynote in a hotel ballroom?

A 24m²–36m² LED wall configured 5m wide by 2.8m tall delivers readability from the back row of a 300-seat ballroom. Pixel pitch matters: P2.6 or finer (P1.9, P2.0) ensures text and code snippets stay sharp at 25–30 meters viewing distance. At Mission Bay Conference Center's Grand Ballroom, we deploy a 30m² wall for 350-person keynotes; slides, terminal windows, and live browser demos all read cleanly from the rear standing area. Budget $3,500–$5,000/day for the LED wall rental including rigging on ground-supported truss or flown from the venue's ceiling points if load capacity permits.

How do I prevent HDMI chaos during hackathon demo finals?

Deploy a wireless screen-casting system at the demo podium. The presenter's laptop connects via AirPlay, Miracast, or a browser-based web interface; the connection code stays visible on the main LED wall between demos. Each team walks up, connects in under ten seconds, presents, disconnects, and the next team connects. At a 200-person hackathon closing ceremony at GitHub HQ, we cycled through eighteen demos in seventy-five minutes with zero HDMI fumbles. Keep a backup HDMI and USB-C cable at the podium for the one team whose laptop refuses to cast — five percent fallback rate in practice.

What power load should I budget per breakout room?

A 75″ LED display draws 180–250W at full brightness. Add the presenter's laptop charger (60–100W), a small PA speaker if the room exceeds thirty people (80W), and you're at 320–430W total — easily handled by a single 15A circuit (1,800W capacity, 1,440W safe sustained load). If the room includes participant laptop charging (ten laptops at 90W each), budget a second 15A circuit. At Stanford GSB's six breakout rooms, we ran each room on a single circuit except the 50-seat case-study room, which got two circuits for display, PA, and participant charging stations.

Do I need a lighting designer for a demo expo hall?

Not for basic booth uplighting, but you will need someone who can program a DMX console. If you're deploying 16–24 RGB par fixtures across six to eight booths, each with custom brand colors, a lighting tech who can map fixtures to console channels and program six color scenes will save you two hours of on-site troubleshooting. At a 300-person dev summit in Palo Alto, the lighting designer programmed all booth scenes in under thirty minutes during load-in, then handed the console tablet to the event coordinator who toggled scenes as sponsors arrived. Budget $600–$800 for four hours of on-site programming and troubleshooting; the alternative is manually setting each fixture's color via its rear menu panel, which takes ten minutes per fixture.

What's the minimum AV package for a 150-person hackathon at a non-traditional venue?

Main stage: one 20m²–24m² LED wall, wireless screen caster, two PA speakers on tripods, wireless lapel and handheld mics, 16-channel mixer. Hacking area: ten quad-tap power strips on ten dedicated 15A circuits (one per table), two phone-charging stations on separate circuits. Ambient lighting: eight RGB par fixtures on stands to define zones (hacking tables, judge area, snack station). Closing demos: same main-stage gear, plus a tech operator to manage wireless casting switchovers. Total day rate for this package in the South Bay: $4,500–$6,000 including delivery, setup, strike, and an on-site tech for the closing ceremony. At the Computer History Museum, we ran this exact setup for a 180-person hackathon; load-in took four hours, strike took two, and we processed twenty-two demos in ninety minutes without a single AV delay.

Tech Conference & Hackathon AV Production Guide

AV production guide for Bay Area tech conferences, dev summits, and hackathons — main-stage screens, breakout displays, demo booth lighting, and sound.

May 11, 2026

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Published on

May 11, 2026