It’s always at the worst moment. The couple is about to enter, the pastor is walking to the stage, the broadcast is two minutes from live – and someone’s headset chooses that moment to crackle, drop, or go silent.

We’ve been there. And we’ve seen every version of this wahala across hundreds of productions in Lagos. Almost every intercom headset problem in the field comes down to one of seven causes, and most have a fix that takes under a minute. This is the exact checklist our technicians run.

1. “My headset is completely dead”

Likely cause: battery (wireless) or connection (wired). It’s nearly always this, and nearly always boring.

The fix: On wireless packs, don’t trust the battery icon you glanced at an hour ago – swap the battery for a charged spare and see. On wired packs, reseat both ends of the cable; a connector that’s 95% inserted looks fine and works 0%. If the pack powers on but you hear nothing, check the volume knob – beltpacks get clipped to belts, and belts brush against things all day.

Prevention: spare charged batteries staged at a known location, and a battery swap scheduled into any event longer than six hours. Every 527 Sounds rental includes spares for exactly this reason.

2. “I can hear everyone, but nobody hears me”

Likely cause: your mic is muted. Yes, really. The mute button on a beltpack is easy to bump, and some headsets also mute by flipping the mic boom upward.

The fix: check the mute switch, then check the boom position – it should sit about two fingers from the corner of your mouth. If neither works, the mic capsule connector at the headset plug may be loose; reseat it.

This one causes a surprising amount of on-set drama, because the “silent” person doesn’t know they’re silent and assumes they’re being ignored. A proper pre-event roll call – part of the briefing in how pro crews talk on headsets – catches it before it matters.

3. Crackling and static

Likely cause (wired): a damaged or poorly seated cable, often one that’s been pinched under a staging deck or stepped on all evening.

Likely cause (wireless): RF interference or the edge of usable range.

The fix: for wired, wiggle-test the cable at both connectors; if the crackle follows the wiggle, swap the cable. For wireless, move a few metres and see if it clears – if it does, you’ve found a dead spot, so note it and avoid it. Persistent static across multiple packs points to interference, which brings us to…

4. Wireless dropouts in one part of the venue

Likely cause: range and obstructions. Lagos venues are full of concrete pillars, metal roofing, and mezzanines, and all of them eat radio signal.

The fix: reposition the base station antenna – higher and central beats tucked in a corner behind the rack, every time. Even moving an antenna two metres can transform coverage.

For large or awkward venues, the real answer is planning: a venue walk-through before the event, which is part of why full-service rental beats dry hire for complex spaces. The same RF logic applies to wireless mics, which we covered in preventing audio dropouts on film sets.

5. Interference from other wireless gear

Likely cause: your event has wireless mics, in-ear monitors, livestream gear, and possibly a second production next door, all shouting into the same airspace. Lagos events are busy like that.

A short-term solution: change your intercom channel/frequency group – professional systems offer several.

The real fix: frequency coordination before the event. When one team supplies mics, comms, and IEMs together, the frequencies are planned as a set and this problem largely disappears. It’s a strong argument for renting your comms and sound system from one provider.

6. Echo or feedback on the channel

Likely cause: someone’s open mic is next to a loudspeaker, or someone is wearing their headset around their neck with the mic live, feeding muffled room noise to everyone.

The fix: the channel leader calls for a mic check – everyone mutes, then unmutes one by one until the culprit is found. Takes thirty seconds. Then remind the team: not actively talking near loud sources? Mute. It’s rule four of comms etiquette.

7. “The whole system just feels unreliable”

Likely cause: the gear itself. Comms equipment that’s been rented out a hundred times without maintenance – frayed cables, swollen batteries, corroded connectors – will produce a different fault every hour, and no amount of field troubleshooting fixes a tired system.

The fix: rent from people who maintain their inventory. Ask the vendor when the batteries were last replaced and whether the system is tested before every dispatch. (Here’s the full list of questions worth asking before you rent anything.)

The meta-fix: a ten-minute comms check

Every problem on this list is cheap to find at 2pm and expensive to find at 7pm. Professional crews run a comms check as part of setup: power on every pack, roll call every position, walk the wireless units to the far corners of the venue, confirm spare batteries are charged and staged. Build it into your sound check routine and event-day headset drama mostly disappears.

Want comms that just work? Every system we send out is tested before dispatch, delivered with spares, and can come with a technician who handles all of the above so you never think about it. Message 527 Sounds on WhatsApp for availability and pricing.