AT-HA40USB AT-HA40USB ・A computer with a USB 2.0 port ・CPU: Pentium 4 (1.8 GHz or more) ・OS: Windows XP、Windows Vista、Windows 7、Mac OSX Specifications Computer requirements Parts and Their Functions Computer requirements: A computer with a USB 2.0 port CPU: Pentium 4 (1.8 GHz or more) RAM: 512 MB or more Compatible OS: Windows XP, Windows Vista, Windows 7, Mac OSX PC interface: USB 2.0 interface Headphone output jack: Compatible sampling frequency: 32 kHz, 44.1 kHz, 48 kHz, 96 kHz φ3.5 mm stereo mini jack Frequency response: 10 Hz to 40 kHz (at -3 dB, 96 kHz) Maximum output level: 45 mW + 45 mW (at 32Ω, 10% T.H.D.) Total harmonic distortion: Less than 0.07 % (at 32Ω, 20 mW output) Signal-to-noise ratio: Greater than 95 dB (JIS-A) Line output jack: Compatible sampling frequency: 32 kHz, 44.1 kHz, 48 kHz, 96 kHz φ3.5 mm stereo mini jack Frequency response: 10 Hz to 40 kHz (at -3 dB, 96 kHz) Total harmonic distortion: Less than 0.02 % (at 0 dBV, 1 kHz) Signal-to-noise ratio: Greater than 98 dB (JIS-A) Nominal output level: 0.8 Vrms Optical digital output jack: Compatible sampling frequency: 32 kHz, 44.1 kHz, 48 kHz, 96 kHz Compatible format S/PDIF: PCM audio Dimensions: H25×W62×D57 mm (excluding protruding parts) Weight: Approx. 55g (main unit only) Accessory: USB (2.0) cable 1.0 m (For product improvement, this product is subject to modification without notice.) 229501991 Headphone output jack (HEADPHONE) Connect to a headphone equipped with a φ3.5 mm stereo mini plug. This can be used while using another output jack. Line output jack (LINE OUT) Connect to an active speaker or an amplifier through a line cable (sold separately) equipped with φ3.5 mm stereo mini plug. This can be used while using other output jacks. Optical output jack (OPTICAL OUT) Digitally output audio signal from a computer through an optical digital cable (sold separately). This can be used while using other output jacks. USB input Connect to a computer through the supplied USB cable. Connect directly to USB port of a computer for a 96 kHz/24 bit operation. Headphone volume Adjust the volume level of the sound heard from a connected headphone. *This model utilizes an analog volume control circuit; as a result you might experience a slight difference in audio level between the right and left channels at the minimum volume setting. Power indicator (POWER) Lights up green when powered and while connected to computer. Thank you for purchasing this product. Before using this product, please make sure that you read through this user manual to ensure that you will use it correctly. USER MANUAL USB HEADPHONE AMPLIFIER AT-HA40USB Outline dimensions (Unit: mm) Caution ●Do not use any USB cables other than the supplied one. Doing so can result in malfunction. ●To prevent fire or shock hazard, do not expose this apparatus to rain or moisture. ●To avoid electric shock, do not open the cabinet. ●Refer servicing to qualified personnel only. ●To prevent fire, do not place any naked flame sources (such as lighted candles) on this apparatus. ●To prevent fire, do not cover the ventilation of this apparatus with newspapers, table-clothes, curtains, etc. ●Do not expose this apparatus to drips or splashes. ●Do not place any objects filled with liquids, such as vases, on this apparatus. ●Do not install this apparatus in a confined space such as a bookcase or similar unit. ●Install this apparatus only in places where ventilation is good. ●In case of emergency, disconnect the USB cable from your computer quickly. ●Do not place this product in a vertical position or in an unstable place. ●Before using this product, be absolutely sure to read the user manual supplied with the products that are to be connected. ●Be sure to purchase the appropriate conversion plug adapter when connecting to headphones with other than φ3.5 mm stereo headphone plug. ●Firmly insert each plug all the way into its base. ●Before connecting, turn the volume level down of this product and the devices to which this product is connected. ●A rectangular optical digital cable is required when connecting to the optical output jack. ●A line cable is required when connecting to the line output jack. Please purchase an appropriate cable according to the connected device. ●Before connecting or disconnecting the cable, turn the connected computer off. ●This product is not compatible with monaural headphones. ●Noise may occur depends on inner ear headphones. Operation Computer settings *Refer also to the user manual of each device to which this product is connected. *Before connecting, make sure the power of each device to which this product is connected is off. *This product is powered by USB bus power. 1. Connect to a computer or each device you use as shown below. 2. Turn on the power of the computer. The power indicator of this product lights up. 3. Configure the computer settings according to ''Computer settings'' of each OS. 4. Play music using a computer. Adjust the volume level of the sound heard from a connected headphone. *This product cannot adjust the volume of devices which are connected to the line output jack and optical output jack. *This model utilizes an analog volume control circuit; as a result you might experience a slight difference in audio level between the right and left channels at the minimum volume setting. 1. This product is registered automatically as an audio device at first time connection. 2. [START]->[Control panel]->[Hardware and sound settings]->[Sound]->[Play] Select [AT-HA40USB] and click [Reset] and then click [Apply]. Windows Vista、Windows 7 1. This product is registered automatically as an audio device at first time connection. 2. [START]->[Control panel]->[Sound and audio property]-> [Audio] Select [AT-HA40USB] in [Previously-defined device] of [Sound reproduction] and click [OK] and then close the window. Windows XP 1. This product is registered automatically as an audio device at first time connection. 2. Open [System environmental setting] in [Application]. 3. Click [Sound] and select [AT-HA40USB] in [Output] tab. Mac OS X 62 25 57 LINE OUT OPTICAL OUT USB AT-HA40USB Front Rear ■ Connection example *Each cable, except for a USB cable and headphones, are sold separately. Headphones (sold separately) AV amplifier Active speaker ( equipped with line output jack ) Line cable (sold separately) Rectangular optical cable (sold separately) Computer φ3.5 mm stereo mini jack φ3.5 mm stereo mini jack USB cable 1.0 m (supplied) AT-HA40USB 2012