ATH-CKR55BT User Manual Wireless Headphones
Introduction Thank you for purchasing this Audio-Technica product. Before using the product, please read through the Quick Start Guide and Caution Guide, as well as this user manual when necessary, to ensure that you will use the product correctly. Safety precautions Although this product was designed to be used safely, failing to use it correctly may result in an accident. To ensure safety, observe all warnings and cautions while using the product.
Safety precautions Cautions for rechargeable battery The product is equipped with a rechargeable battery (lithium polymer battery). • If battery fluid gets into eyes, do not rub them. Rinse thoroughly with clean water such as tap water and consult a doctor immediately. • If battery fluid leaks, do not touch fluid with bare hands. If fluid remains inside the product, it may cause malfunction. If battery fluid leaks, contact your local Audio-Technica dealer.
Notes on use • Be sure to read the connected device’s user manual before use. • Audio-Technica will not be liable in any way for any loss of data in the unlikely event that such losses should occur while using the product. • On public transportation or in other public places, keep the volume low so as not to disturb other people. • Minimize the volume on your device before connecting the product. • When using the product in a dry environment, you may feel a tingling sensation in your ears.
Part names and functions Left/right (L/R) indicator Housing Bushing The left bushing has a protrusion for distinguishing between the left and right. Power supply/control button Use to turn the power supply ON/OFF, play/ pause music and videos, and answer/end phone calls. Volume buttons Adjust the volume using + and –. Indicator lamp Displays the operating status and battery level of the product. Battery jack Battery case Used to connect the included USB charging cable and charge the product.
Charging the battery • Fully charge the battery when using for the first time. • When the rechargeable battery is running low, the product will sound 2 sets of 2 beeps through the headphones, and an indicator lamp will flash in red. When these beeps sound, charge the battery. • It takes about 3 hours to charge the battery fully. (This time may vary depending on usage conditions.) • While the battery is charging, the product's Bluetooth connection remains disabled and therefore the product cannot be used. 1.
Connecting via Bluetooth wireless technology About pairing To connect the product to a Bluetooth device, the product needs to pair (register) with the device. Once they are paired, you do not need to pair them again. The product also supports multipairing in which records of connected devices are saved. However, you will need to pair again in the following cases: • If the product is deleted from the Bluetooth device’s connection history. • If the product is sent out for repair.
Using the product The product can use Bluetooth wireless technology to connect to your device and play music, receive phone calls, etc. Use the product for whichever of these purposes suits your needs. Note that Audio-Technica cannot guarantee the operation of displays, such as the battery level display, or applications via Bluetooth devices.
Using the product Listening to audio • To connect for the first time, pair the product and your device by Bluetooth wireless technology. If you have already paired the product and your Bluetooth device, turn on the Bluetooth device’s Bluetooth connection and turn on the product. • Use your Bluetooth device to start playback, referring to the device’s user manual as necessary. Power supply/Control button Press Play/pause Plays or pauses music and video playback.
Using the product Talking on the phone • If your Bluetooth device supports telephone features, you can use the product to talk on the phone. • When your Bluetooth device receives a phone call, the product sounds a ring tone. • If a call is received while you are listening to music, music playback is paused. When you finish the call, music playback resumes.*1 When Receiving a call Talking on a call Operation Function Press the power supply/control button. Answers the call.
Cleaning Get into the habit of regularly cleaning the product to ensure that it will last for a long time. Do not use alcohol, paint thinners or other solvents for cleaning purposes. • To clean, wipe with a dry cloth. • Natural oils from the skin are particularly likely to build up on the areas where the eartips attach to the headphones (see figure at right). If these areas are not cleaned, the eartips can become detached. Clean them regularly.
Eartips Eartip size The product includes silicone eartips in 4 sizes (XS, S, M, and L). At the time of purchase, the M-size silicone eartips are attached. To ensure the best sound quality, select the eartip size that is best suited for you, and adjust the eartips inside your ears for a snug fit. It may be difficult to hear bass sounds if the eartips do not fit snugly in your ears.
Troubleshooting Problem Solution Power is not supplied. • Charge the product. Unable to pair. • • • • No sound is heard / Sound is faint. • Turn on the power of the product and the Bluetooth device. • Turn up the volume of the product and the Bluetooth device. • If the Bluetooth device is set to the HFP/HSP connection, switch to the A2DP connection. • Move away from obstacles between the product and the Bluetooth device, such as people, metal or walls, and place them closer together.
Troubleshooting SBC priority connections (measures for when sound is delayed significantly) When connected via the AAC codec, significant sound delays can be alleviated by changing the connection codec to the SBC codec, an audio compression format that comes standard with Bluetooth devices.*1 Connecting to a SBC priority connection 1. Turn the product power to “ON”. 2. Press and hold the + and - volume buttons simultaneously (for about 2 seconds) with the music paused.
Specifications Headphones Type Dynamic Driver 10.7 mm Sensitivity 103 dB/mW Frequency response 5 to 35,000 Hz Impedance 16 ohms Microphone Type Electret condenser Polar pattern Omnidirectional Sensitivity -44 dB (1 V/Pa, at 1 kHz) Frequency response 100 to 10,000 Hz Communication specifications Communication system Bluetooth version 4.1 Maximum RF Output 10 mW EIRP Maximum communication range Line of sight - approx. 10 m (33') Frequency band 2.402 GHz to 2.
Audio-Technica Corporation 2-46-1 Nishi-naruse, Machida, Tokyo 194-8666, Japan ©2019 Audio-Technica Corporation Global Support Contact: www.at-globalsupport.com ver.1 2017.07.10 138900961-02-02 ver.2 2019.02.
