Zulu 4 Support

Is Zulu 4 available in an aircraft-powered version to eliminate the need for AA batteries?

Yes. The Zulu 4 is available in an aircraft powered configuration. It uses the industry standard LEMO plug (6 pin). This plug is standard on all Cirrus and Cessna 350 and 400 series aircraft. The Zulu 4 also offers flex power so you can power your headset if you use it with a Dual GA plug adapter.

What kind, how many, and how long do the batteries last?

The Zulu 4 battery-powered headsets require two AA batteries. Use alkaline batteries for best performance, although lithium batteries may provide improved battery life in colder temperatures. We do not recommend using rechargeable batteries or mixing battery types and brands. A set of batteries provide an average of 40 hours of power. However, Bluetooth usage will impact battery life.

What happens if my batteries run out in flight?

If you lose power at any time, Zulu 4 will continue to perform as a passive headset. When batteries begin to run low, the power LED flashes red, and the headset will continue to operate. Install new batteries as soon as possible at any indication of low batteries. We recommend you add checking your headset batteries on your preflight checklist.

Why do I hear radio communications in only one ear?

Zulu 4’s Stereo/Mono DIP switch is probably set to Stereo while your audio panel is transmitting a mono signal. To fix this, change Zulu 4’s Stereo Mono DIP switch to Mono. 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.

What is mic gain and how do I adjust it?

You can think of microphone gain as a volume control for your microphone. Soft voices might benefit from an increase in gain in order to improve audibility and, in some cases, to break squelch; louder voices may need little to no gain increase. Equipping each headset with its own gain adjustment helps balance loud and soft voices in a multi-headset environment.

To adjust mic gain, remove the foam windscreen on your microphone and then remove the small cap next to the Lightspeed logo on our microphone to reveal the adjustment dial. Turning the adjustment dial clockwise will increase gain and turning it counterclockwise will decrease gain. A little adjustment goes a long way, so move the dial in small increments (think one-hour increments on a clock face) and test it in your aircraft. When you are satisfied with the adjustment, replace the cap and foam windscreen.

How do I connect my Zulu 4 headset with my Bluetooth device?

1. Power on the headset (Bluetooth is off by default to conserve battery)
2. Press and hold the Bluetooth button for 3 – 5 seconds to turn on Bluetooth
   • Once Bluetooth is on you will see a solid blue light
   • If you have connected a device previously, you can connect that device via Bluetooth
3. Press and hold the Bluetooth button for 2 seconds to initiate pairing mode
   • You will see the device flash red and blue
   • Navigate to your devices Bluetooth menu to connect the “Zulu 4_#####” headset
4. Once your device is connected you will here an audio cue and the Bluetooth light will blink blue

How can I reduce static noise during cell phone calls?

To reduce RF interference during phone calls, keep cell phones at least 12 inches from the Zulu 4 controller and headset when making calls.

When flying, what causes a thumping or warbling noise in the ear cup?

To gain peak performance from the ANR feature designed into your Lightspeed headset, it is necessary to have a solid seal around your ears. Without a tight seal, air can seep in and cause the ANR to compensate for uneven internal cup pressure, often resulting in a warbling noise. If you are experiencing this issue, please contact customer service so that we may assist you in identifying and correcting the problem. Customer service may be reached at: 1-800-332-2421 or [email protected].

Where is the serial number located?

The Zulu 4 serial number (a small, white, bar-code sticker with numbers) can be found on the headset underneath the head pad. The head pad, located on the inner radius of the headband, must be removed to reveal the serial number. Simply pinch the cushioned part of the head pad, pull down and it will snap out.

The ear cups are resting on the tops of my ears, which is uncomfortable. How can I adjust my earcups for the best possible fit?

If you feel that your ears are not centered within the ear cups, even after collapsing the sliders completely, a taller head pad might be the solution. This will move the ear cups further up the side of your head and should allow you to center your ears within the cups.

To order a complimentary tall head pad (part number A484), please call Customer Service at 800-332-2421 or email [email protected] and mention promo code FTHP. You will need to provide your headset serial number.