The Delta Zulu Stereo/Mono DIP switch is likely set to Stereo while your audio panel is transmitting a mono signal. To fix this, change the Delta Zulu Stereo/Mono DIP switch to Mono (the “on” position). This setting does not affect music or audio from auxiliary devices; you can hear stereo sound on auxiliary devices even when the Stereo/Mono DIP switch is set to Mono.
To reduce RF interference during phone calls, keep cell phones at least 12 inches from the Delta Zulu controller and headset when making calls.
The headset may not be in pairing mode. To enter pairing mode, you must start with Bluetooth mode turned fully OFF. It’s a good practice to turn off Bluetooth before turning off your headset which may help retain the pairing
A smart device may already be connected to your headset. If the device is playing music, on a phone call or using FlightLink, the headset prevents unpairing for safety concerns. Please pause music, end the call, or stop the FlightLink recording to return the device to “idle”. Once this has been achieved, please attempt Bluetooth Pairing again.
Some intermittent popping is typically a byproduct of noise or vibration that creates an instability in the ANR electronic performance. Noise levels, or cup movement, causes the ANR system to be chasing ‘noise’ that is intermittent and hard to cancel. The instability can cause something that sounds like popping.
Headset fit is the best, most important tool to eliminate these occasional noise artifacts. The two main reasons for this behavior would be the position of the cups on your head and the seal around your ears.
1. Follow the fit instructions on page 6 to ensure it is comfortably positioned and high enough to not rest to much on your jaw. If you are consistently having this ‘popping’ problem, call and request a taller head pad.
2. Try to ensure the earlobe is fully ‘inside’ the cup and then minimize the leaks that might occur around sunglass frames. Many are very flat but non-aviator versions might have significant thickness in the frames. To test for whether the seal is good, press in slightly on the cup (during any popping) and see if it goes away.
If additional help is still needed, please reach out to our Customer Service line and we can provide more
To center your ears within the ear cups, a taller headpad should solve this problem. This will move the ear cups further up the side of your head so you can center your ears within the cups.
Order a complimentary tall head pad (Part No. A484) by calling Customer Service at 800-332- 2421, or email them at [email protected] You will need to provide your headset serial number.
The Delta Zulu serial number (a small, white, barcode sticker with numbers) is located on the headset underneath the head pad on the inner radius of the headband. Remove the head pad to reveal the serial number. Simply pinch the cushioned part of the head pad, pull down and it will snap out.
Always disable ComPriority before making cell phone calls because the other party will be muted. When activating the ComPriority button, an audible message will report the function is “enabled” or “disabled”.
The Mic and pre-amp on the Delta Zulu mic was modified to create less background noise when you break squelch and speak. It creates a quieter flying experience for all attached to your ICS system. Used individually, you will naturally compensate for that with an adjustment to your squelch setting. While
that is a positive for overall system noise reduction, some people will experience the difficulty you
To ensure you gain the benefits of this additional quieting performance, please do the following IF
your other headsets are from Lightspeed Aviation:
1. On the NON-Delta Zulu models, remove the mic muff and then remove (carefully, they are easy to
lose!) the small black cap on the back side of the microphone holder.
2. With a small, jeweler’s flathead screw driver, insert it into the ‘slot’ and turn the internal gain potentiometer inside counter clockwise 1 ‘Hour’ (for example, from the 11:00 position to 10:00).
3. Re-attach the black cap and try it out in your plane. It should have largely equalized the squelch setting that will work well for all your headsets.
If you have only a single squelch intercom control and do NOT have Lightspeed headset, the other brands don’t provide this customizing feature. Sadly, you will have to do the ‘reverse’ of the above, and forfeit some of the quieting available in a Lightspeed Ecosystem.
1. On the Delta Zulu models, remove the mic muff and then remove (carefully, they are easy to lose!) the small black cap on the back side of the microphone holder.
2. INCREASE the gain on your Delta Zulu headset… start with one ‘hour’ (so 11:00 to 12:00).
3. Re-attach the black cap and try it out in your plane and with your ICS. It should have largely equalized the squelch setting that will work well for all your headsets. You will likely experience a higher level of background noise when your mic is ‘open’.
Mic gain adjusts the sensitivity of the microphone to help balance loud and soft voices you hear in a multi-headset environment.
ComPriority is automatically enabled by default when you power on your headset.
Turn on or off ComPriority using the bottom controller button. When ComPriority is enabled and radio communications are detected, the volume of auxiliary devices will be significantly reduced to make incoming communication the priority.
The Stereo/Mono DIP switch setting should match the signal from your audio panel. Delta Zulu is shipped in Mono (the “on” position). Unless you are using your intercom or Audio panel to provide Stereo music to listeners, there is no reason to switch your dip switch settings to stereo. Bluetooth music will be played in Stereo even with a “Mono” setting.
STEREO should be used for a stereo panel and MONO for a mono panel.
Generally no changes are needed to deliver optimal performance in most aircraft. Certain audio panels require the portable units to be set to the Stereo position. Please refer to the list provided on our Website FAQ’s.
DIP switches are factory set to match most aircraft audio panels. To change a DIP Switch setting:
1. Slide off the battery cartridge to reveal the DIP switch.
2. Use a small pointed object (such as a wood toothpick) to slide the DIP switch to ON or OFF.
Absolutely! Registering your headset will assure quick and efficient processing of any repair or accessory purchases that you may need. If you purchased your Delta Zulu headset directly from Lightspeed, your headset is already registered with us.
You will need your serial number to register your headset or make a request for warranty repair.
Lightspeed Aviation, Inc. has a 7-year limited warranty for new Zulu series headsets.
To ensure peak ANR performance and comfort, replace the ear seals, head pads, and mic muffs every 18 months. These are wear items that are not covered by the Lightspeed warranty and are available for purchase on our website at LightspeedAviation.com/Accessories.
To connect a music player to the Delta Zulu auxiliary input jack, use an appropriate UAC cord. To adjust the volume on a device connected using the auxiliary input jack, use the controls on the connected device.
Easy to replace battery packs give you the option of using AA batteries or the included rechargeable lithium ion battery pack, your choice.
The lifespan of the carbon monoxide sensor is 10 years. You can send your headset in to have a CO sensor replaced for a nominal fee.
The headset checks that the CO sensor is operational on each power up and during operation. The headset will notify the user of a problem via an audible warning “Carbon Monoxide Not Monitored” and there will be a visual error shown in the mobile app.
Yes, you will be able to trade in your Zulu 3 to a Delta Zulu near the Summer of 2023 through our Trade Up Program. We will not be able to convert your Zulu 3 to a Delta Zulu, like we do for Zulu 2 to Zulu 3.
No, you do not. Our UAC to Lightning cable will work for this, but you can also accomplish this via Bluetooth.
Whatever device is selected as the primary audio device, the iOS device audio will stream to and take calls from. There are 5 scenarios we have provide here and the expected behavior of each when an iOS Device is connected to:
Normal operation of the Delta Zulu headset should not be affected for any of these scenarios, and alerts should play normally.
Yes, you can wear your hearing aid with the Delta Zulu ANR headset. If you want to use the HearingEQity feature to enhance your hearing acuity, take the 12-frequency test in the Lightspeed App to create a customized profile. If you plan on using your hearing aid during flight, while also using your new HearingEQity profile, be sure to take the test while wearing your hearing aid. You can create a different profile without the hearing aid if you chose to do so.
The CO sensor and remainder of circuitry gets checked for functionality every time that the headset powers on. If there is an error, there will be an audio alert “CO Not Monitored”. If it is working normally, you will not get this message. However, you can tell the CO value by a single press on the multifunction button. If you press this within 3 minutes of powering on the headset you will receive the message “Calculating Carbon Monoxide”. After the initial calculation period, the single press action will report the CO value to you. For example, with no CO present, it will say “Carbon Monoxide Normal, zero PPM”.
The Lightspeed App is NOT REQUIRED to use the Delta Zulu ANR headset. For primary Android device users, an iOS device is only needed to set up your HearingEQity™ profile along with carbon monoxide preferences and PPM settings for the first time accessing the Lightspeed App. You may use any iPhone or an iPad or other similar Apple device with iOS version 13 or higher. Your personalized hearing profile and CO alert preferences will be saved in your headset after you complete the set-up process, eliminating the need to have an iOS device for future use with your Delta Zulu.
Please note that while some additional convenient functions on the App will not be available without regular access to an iOS device, the important safety features of Delta Zulu are stored in the headset itself. Once set up, they will automatically deliver improved flying safety.
Yes, if you have a Panel Power/LEMO (6-pin) plug on your Delta Zulu, the power from your aircraft panel will charge your Lithium-Ion battery during operation. You can also use a USB-A to UAC accessory cable from the panel if it has USB ports. In this scenario your panel will charge the Lithium-Ion battery in all three plug configuration versions of Delta Zulu – Dual GA, Heli and Panel Power/LEMO(6-pin).
Lightspeed Aviation, the leader in wearable ANR technology for pilots, operates with a simple strategy: know your customer well and remain committed to relentless product evolution. At Lightspeed, everything we do is in service to our customer and our products push performance to the edge of technological possibilities.
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