ATH-DSR9BT

Wireless Over-Ear Headphones with Pure Digital Drive

The ATH-DSR9BT over-ear wireless headphones employ Audio-Technica’s new Pure Digital Drive system, which allows the headphones to operate without a sound-degrading D/A converter that conventional wireless headphones rely upon. Instead, the ATH-DSR9BT utilizes Trigence Semiconductor’s Dnote chipset to receive the digital audio signal from a Bluetooth wireless transmission, process and transfer it to the driver where the digital pulses of the chipset move the voice coil and diaphragm forward and backward to create the sound waves heard by the listener.

The Pure Digital Drive system likewise depends on a re-engineered 45 mm True Motion Driver, which features a lightweight diaphragm with DLC (diamond-like carbon) coating for superlative fidelity and extended 5 Hz – 45,000 Hz frequency response. The driver’s 4-core twisted OFC-7N voice coil provides precise control of the diaphragm displacement, and an acoustic resistor controls the airflow in front of and behind the diaphragm to ensure smooth, natural audio reproduction across the entire frequency range. The entire driver assembly is housed within a layered aluminum structure that minimizes unwanted resonance and isolates the electric circuitry from the housing’s acoustic space, resulting in optimal phase and transient response.

The Pure Digital Drive system also enables the ATH-DSR9BT to overcome the sonic limitations of conventional Bluetooth wireless transmissions by supporting the 24-bit/48kHz Qualcomm® aptX™ HD codec. (aptX, AAC and SBC codecs are also supported.) The headphones can reproduce Hi-Res Audio when connected to a computer or other digital playback device via the included 2.0 m (6.6') USB cable.

The ATH-DSR9BT is equipped with a microphone, volume control and simple tap control for answering/ending calls and playing/pausing music on a smartphone or other device. Three LED indicators allow you to easily monitor pairing and charging status, battery level, and the codec currently in use. The headphones’ internal lithium polymer battery provides approximately 15 hours of continuous use (up to 1000 hours in standby mode) and can be recharged using the included USB cable.

• Exclusive Pure Digital Drive system keeps audio signal completely digital from source to driver for exceptionally pure sound

• Dnote chipset controls driver amplitude directly with digital signals – no D/A converter required

• Compatible with Qualcomm aptX HD, aptX, AAC and SBC codecs, enabling wireless transmission with a resolution up to 24-bit/48kHz

• Exclusive 45 mm True Motion Driver, featuring 4-core twisted OFC-7N voice coil and diaphragm with DLC (diamond-like carbon) coating, extremely accurate audio reproduction with extended high frequencies

• Housing’s dual-layer isolation structure keeps the electric circuitry separate from the acoustic space for optimal phase and transient response

• Acoustic resistor controls airflow inside the diaphragm housing, yielding more natural sound

• Mic and volume/control switch are built into the earcup for convenient control of smartphones and other Bluetooth wireless devices

• NFC (Near Field Communication) functionality enables touch pairing with NFC-compatible Bluetooth wireless technology devices

• Remembers the last eight Bluetooth wireless devices paired

• LED indicators in the earcup display pairing and charging status, battery level, and the codec currently in use

• Heat-reactive soft foam earpads and an easily adjustable leather headband provide a comfortable fit with outstanding sound isolation

• Internal battery provides approximately 15 hours of continuous use (1000 hours on standby) on a full charge

• Includes a 2.0 m (6.6') USB cable, for charging and Hi-Res Audio playback. and hard carrying case
• SPECIFICATIONS
  
  

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  Input Jack: Micro USB Type B

  Type	Dynamic
  Driver Diameter	45 mm
  Voice Coil	OFC-7N
  Frequency Response	5 – 45,000 Hz
  Sensitivity	97 dB/mW
  Impedance	38 ohms
  Battery	Internal Battery: 3.7V rechargeable lithium polymer battery
  Battery Life	Approx. 15 hours continuous use (1000 hours standby) Charging Time: Approx. 5 hours (for 0-100% charge) Depending on environmental conditions
  Weight	310 g (10.9 oz), without cable
  Accessories Included	2.0 m (6.6') USB charging cable, hard carrying case
  Type (Microphone)	condenser
  Sensitivity (Microphone)	-44 dB (1V/Pa a 1 kHz)
  Frequency Response (Microphone)	50 – 4,000 Hz
  Polar Pattern (Microphone)	omnidirectional