Service & Support

Start at the connector. Sweat runs down the cable and sits on the pins, and corroded pins make a poor contact.

1. Unplug the mic and look at the pins. Green, white or dull grey deposits are corrosion.

2. Clean the pins with contact cleaner (DeOxit or similar) and let them dry.

3. Re-apply eGloop. A small dab of eGloop at the base of the connector. Cleaning strips the protective coating, and the sweat warranty requires it.

4. Plug back in. Push it straight in until it seats fully.

Still crackling? Talk into the mic while you gently flex the cable where it enters the connector, then where it meets the frame. If the noise follows the flex, the cable has failed at that point and the mic needs a bench repair.

First work out whether it's the mic or the rest of the chain.

1. Check the receiver's RF lights with the transmitter switched on. No lights means a transmitter or channel problem, so skip to the transmitter section.

2. Try a different headset on the same transmitter. If that one works, your mic is the fault.

3. Check the connector matches the transmitter. A mic wired for one brand of transmitter may not work on another. If you have changed systems, use the connector finder.

Usually a saturated windscreen. Sometimes a capsule that hasn't had time to dry, or one that has drifted away from your mouth.

1. Pull the windscreen off and test without it. If the sound comes back, fit a fresh one. Windscreens are model-specific, so pick your headset when you order.

2. Let the mic dry. Hang it in open air overnight. Not in a bag, a drawer or a closed case.

3. Check where the capsule sits. Fitness headset capsules are built to reject sound that isn't close, so position matters. Keep the capsule right at the corner of your mouth, not out in front or down by your chin.

Feedback comes from the room and the settings. It isn't a mic fault.

Move away from the speakers and never teach from in front of them. Turn down the treble on the voice channel (on an Aeromix, the voice treble control). Keep the capsule close to your mouth so the system needs less gain.

If a room still rings, email us what speakers and mixer you have and where they sit. We'll help you set it up.

If the dropout follows your movement and not your position in the room, something is loose or a wire is breaking.

1. Reseat the connector. Unplug it and push it straight back in until it seats fully.

2. Check the cable isn't pulled tight between the headset and the transmitter when you move.

3. Flex the cable gently while you talk. A dropout you can trigger by flexing is a cable fault, and that's a repair.

If it only happens in certain parts of the room, that's wireless range or interference. See the transmitter section.

Drops, bends and chewed cables are physical damage, which the sweat warranty doesn't cover. Send us a photo before you ship anything. We'll tell you whether it can be repaired and roughly what it will cost.

The FM-41 is the exception on cables: its cable is replaceable, so a cable fault doesn't mean a new headset.

Replace it. Windscreens are consumable. Wash them weekly, let them dry fully before they go back on, and fit a new one every few weeks, sooner if it stays discolored or holds moisture. A saturated windscreen holds sweat against the capsule.

1. Fit a brand-new alkaline AAA and check it's the right way round.

2. Look at the battery contacts. If they are dull or green, clean them with contact cleaner on a cotton swab and add a trace of eGloop.

3. Check the battery cover closes fully. A cracked or missing cover lets the battery lose contact when you move. Replacement covers come as a 2-pack.

No light with a fresh battery and clean contacts means it needs the bench.

The battery is low. One AAA runs about 5 hours, so start each teaching day with a fresh one instead of finishing yesterday's.

1. Look at the receiver. If no RF lights come on when the MTU8 powers up, the two aren't on the same channel. Set the MTU8's channel selector to match the receiver.

2. Check the frequency group. The MTU8 and the receiver must be the same group (for example SU520A). A different group won't connect on any channel.

3. RF lights on? Then the radio link is fine, and the headset is the more likely culprit. It's the wear part in any wireless system. Push the mic lead fully into the MTU8, then try another headset.

4. Check what comes after the receiver: the cable to the mixer, the mixer's mic channel, and any mute buttons.

1. Fresh battery first. Range falls as the battery does.

2. Free the antenna wire. It should hang clear, not coiled, knotted or tucked under the headband or a wrap.

3. Check the receiver's antennas. Both fitted, both pointing up, with the receiver out in the open. If it lives in a rack, the antennas belong on the front. Our rackmount kit includes the extension cables.

4. Look for a second transmitter on your channel. Two transmitters on one channel will wreck each other. Make sure the last instructor's pack is switched off and the room next door is on a different channel.

5. Change channel. Move the MTU8 and the receiver to a new channel together.

Something is loose. Check three things.

1. The mic lead is pushed fully home in the MTU8.

2. The battery cover is shut tight, so the battery can't bounce off its contacts.

3. The mounting bracket screws are snug, so the transmitter isn't rocking on the frame.

A cracked bracket is a cheap fix. The replacement mounting frame comes with brackets for the EMic and for the Aeromic and Cyclemic.

If a fresh battery doesn't cure it, moisture is getting in faster than it can dry out.

Each MTU8 is rated for up to 3 non-consecutive classes a day, so back-to-back classes need two units in rotation. Let it air-dry fully between uses, never sealed wet in a gym bag.

For hot or heavy-sweat formats, the Yoga Wrap puts a neoprene barrier between your scalp and the transmitter.

If it has quit after a soaking, take the battery out, leave the cover off for a day so it can dry, and test again before you send it in.

Sweat-related electronic faults are covered for 1 year from purchase. Wear and physical damage are not: broken battery tags, cracked covers, worn switches, damaged plugs. Most of those are inexpensive repairs, and covers and brackets are parts you can swap yourself. Full terms are on the warranty page.

Check the power adapter is pushed in at both ends and the outlet is live. If the rack runs from a switched power strip or sequencer, check that is on too. Power supplies carry a 12-month warranty.

The transmitter and receiver aren't on the same channel, or aren't the same frequency group. Match the channel first. If that doesn't do it, compare the group code on both units.

With a good link you should see RF signal lights and either the A or B diversity light.

The radio link is good, so the fault is after the receiver. Check the cable from the receiver to the mixer, that the mixer's mic channel is up and not muted, and that the receiver's own output hasn't been turned down. If you have the cable for it, try the receiver's other output (XLR or 1/4 inch).

Check the squelch control hasn't been moved. Set too high, it shortens range. Set too low, it lets noise through when the transmitter is off. Also check both antennas are finger-tight and upright.