AT-PHA55BT User Manual Wireless Headphone Amplifier
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.
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. • Do not subject the product to strong impact.
Part names and functions Connector jack Connect headphones (sold separately). Control button Use this button to play and pause audio and answer a phone call. Microphone Use this part for talking on the phone with this product. Volume buttons Adjust the volume using + and –. Power switch Use this switch to turn the power ON and OFF, as well as to switch modes between MODE A and MODE B. Indicator lamp Displays the operating status and battery level of the product.
Charging the battery • Fully charge the battery when using it for the first time. • When the rechargeable battery is running low, you will hear a beep from the connected headphones, and an indicator lamp will flash in red. When you hear this beep, 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. However, you 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. • If you try to pair nine devices or more. (This product can save pairing information on up to eight devices total.
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. Power supply ON/OFF Moving the power switch to either MODE A or MODE B will turn the power ON.
Using the product Wearing the product • Connect headphones (sold separately) to the connector jack. • The included clip can be attached as shown in the figure. The included clip as shown in the figure. You can hook it onto your chest pocket, etc. Clip Headphones (Sold separately) Listening to audio • To connect for the first time, pair the product and your device by Bluetooth wireless technology.
Using the product Supported codecs This product supports LDAC/Qualcomm® aptX™audio (aptX, hereinafter)/AAC/SBC codecs. During the pairing process, one of the LDAC/aptX/AAC/SBC codecs will be automatically selected according to the settings of the Bluetooth device. The indicator lamps show the selected codec.
Using the product Hold function When you press and hold the control button and the volume button (+) simultaneously for about 2 seconds while using the product, it will disable the buttons and prevent unintended operation. • To deactivate this function, press and hold the control button and the volume button (+) again for about 2 seconds. • You can still use telephone features, such as receiving and rejecting a call, while the hold function is enabled.
Cleaning Get into the habit of regularly cleaning the product to ensure that it lasts for a long time. Do not use alcohol, paint thinners, or other solvents for cleaning purposes. • Wipe the product, clip, and USB charging cable/plug with a dry cloth if dirty. • If the product will not be used for an extended period of time, store it in a well-ventilated place free from high temperatures and humidity. Troubleshooting Problem Solution Power is not supplied. • Charge the product. Unable to pair.
Troubleshooting SBC priority connections (for when sound is delayed significantly) When the connection codec is AAC, significant sound delays can be alleviated by changing the connection codec to SBC, which comes standard with Bluetooth devices. *¹ Connecting to a SBC priority connection When the pairing with a Bluetooth device has been completed 1. Turn the power ON while holding down the volume (-) button.
Indicator lamp display The indicator lamps of the product show the product's status as explained below. For details on the indicator display of the battery (charging) status when a USB charging cable is connected, see “Charging the battery” (p. 5). For details on the indicator display for each supported codec, see “Supported codecs” in “Listening to audio” (p. 9).
Specifications Microphone Type Electret condenser Polar pattern Omnidirectional Sensitivity -36 dB (1 V/Pa, at 1 kHz) Frequency response 50 to 8,000 Hz Communication specifications Communication system Bluetooth version 4.2 RF output 3 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 www.audio-technica.co.jp ©2017 Audio-Technica Corporation 202900080-02-01 ver.1 2017.12.
