How to pair? E.g. NiTRO-X Wireless
1. Activate bluetooth on sending device.
2. Press centre button on remote control until LED is lit and voice declares ”power on”. When diode starts flashing blue and red, it searches for device to pair.
3. When NiTRO-X appears in the list of available bluetooth devices, click it and the earphones starts pairing with desired device. The sending device will acknowledge pairing when done.
Sound quality is deteriorating and/or level is decreasing
This is most likely due to dirt/earwax inside the grid. Carefully clean the earphone grid using a soft brush, e.g. tooth brush. If some sort of solvent is required, use hydrogen peroxide (N.B. max 3%) on a cotton swab and gently apply on the grid. Let it work for approximately 30 seconds and try brushing again. Do not apply excessive solvent, it may flow through the grid onto the driver, dissolve and irreparably destroy the driver cone.
If the above measures do not restore sound quality, we recommend that the driver grid is removed*. N.B. this way requires certain levels of skills and practice from working with tiny parts. The grid is fixed with an adhesive compound, possible to reattach. Use a thin needle or similar to lift the grid out, gently brush it clean and reattach it by gently pressing it back in original position.
*The later NiTRO models offer threaded grid assy, possible hust to unscrew from the ear capsule. The grid may be cleaned with just soap and luke warm water. Make sure the grid assy is dry before reassemble as water may irreparably destroy the driver.
Sound is fragmentary and/or irregular
Probably the sound stream between the device and earphones is jammed or disrupted. It may depend on normal household appliances, other wireless devices signals or the distance between the earphones and device is too far or blocked.
The bluetooth reach is normally about 10 meters. Optimally it should be even closer, not to get corrupt bit streams. Try to shorten the distance between earphones and playback device. If problem remains, try re-starting the earphone and device, restore the paired devices and finally try pairing them again. Always make sure that you have latest software update from the manufacturer of your sending device.
Determine battery level on my wireless earphones?
iOS devices offer a battery level monitor symbol in the display next to the internal battery symbol of the device.
Android devices offer a monitoring of the battery level if you check for “connected device” in settings menu. There are also apps in Google Play Store like e.g. Bluetooth Battery Indicator or Bluetooth Headset Battery to monitor battery level.
When battery level reaches 10% and dropping, the earphone voice synthesis speaks ”battery low”.
Remote control malfunctions; e.g. adjusting volume, skip track, play/pause or answer incoming call.
• Check remote control rear switch position (apply to certain models) to fit desired device software
Pos 1 – Android and Windows
Pos 2 – iOS (Apple)
• Check that possible earphone cable connector (3.5 mm plug) is properly seated, especially if case, shell or cover is mounted
• Verify device compatibility
Poor bass sound
The most common reason for poor bass level is wrong size of ear tips. They act as a seal enclosing the bass punch. If there is leakage, the resulting bass sound pressure inside the ear become much lower.
Unfamiliar metallic click sound while mounting the earphones into the ear canal
A phenomena deriving from the overpressure inside the ear while entering the earphone capsule called ”driver flex”. The pressure peak passes the driver cone with a click and is fully normal, completely harmless to both hearing and earphone and is actually more of an acknowledgement that now the fit is perfect with a very good and tight seal.
How to find a user’s manual?
Every model user’s manual is offered as a download link called ”manual” found in the technical specification section on Sound by Sweden webpage. You can also click on the links below.
Nero | Nero-X | Nitro | Nitro-X
I´ve lost the supplied charging cable. How to charge without original cable?
The cable for charging our earphones is a standard USB-A to Micro-USB. Cables with this standard are available at almost any electronics retail store.
Sound By Sweden AB