Alpine DAP-7909

Audio operation:

• No. of storable tracks in player: Approx. 780 tracks (FLAC / 192 kHz / 24 bit), Approx. 4,940 tracks (FLAC / 44.1 kHz / 16 bit)
• Continuous playback: Approx. 10 hours (FLAC / 44.1 kHz / 16 bit)
• File formats: WAV, FLAC, MP3, WMA, OGG, AIFF, DEF, DSF
• Sampling rate: 88 kHz, 16 kHz, 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz, 768 kHz ( native playback is available for up to 384 kHz; 768 kHz source is converted down to 384 kHz); DSD: DSD64 (2.8 MHz) stereo, DSD128 (5.6 MHz) stereo, DSD256 (11.2 MHz) stereo (native)
• Quantization bit rate: 8 bits, 16 bits, 24 bits, 32 bits (Float/Integer) (native)
• Bit rate: FLAC: 0 to 8; Ape: Fast to High; MPS/WMA: Max. 320 Kbps; OGG: Up to QIO; ACC: Max. 320 Kbps
• Folder management: Yes
• Tag information: ID3 V1 Tag, ID3 V2 2.0, ID3 V2 3.0
• Database management: Track, album, artist, genre-based, playlist, folder, MQS
• Resume function: Yes (Playback after cueing)
• Album artwork: Yes
• Lyrics display: Yes
• Playlist function: Yes
• Playback method: Normal playback, shuffle
• Repeat mode: Repeat, 1-track repeat
• Equalizer function: PRO EQ (fixed), user EQ (20 band: 30 Hz to 18 kHz / gain: ±5.O / Q value: 0.1 to 0.4)
• Gapless playback: Yes

Operation:

• Physical keys: Rewind, Playback/Pause, Fast-forward, dial volume (power and screen ON/OFF), touch sensor
• Locking function: Dial volume lock (can be set via notification bar to be pulled down from upper part of screen)
• Volume adjustment: 151 steps

Bluetooth:

• Version: 4.1
• Profile: A2DP, AVRCP
• Supported codec: SBC, aptX™ HD

Wi-Fi, OS, CPU:

• Wi-Fi Standard: IEEE 802.11 b/g/n (2.4 GHz)
• Supported OS: Windowse 10/8/7 (32/64 bit), XP, Mac OS X 10.7 or higher
• CPU: Octa Core

Audio:

• D/A converter: AK4497EQ from AKM (Asahi Kasei Microdevices) x2 (Dual DAC)
• Input terminal: USB Type-C (charging, data transfer, USB-DAC)
• Output terminal: Earphone (unbalanced), balanced output (2.5 mm / 4 polarities)
• USB AUDIO output: PCM: 8 kHz ~ 384 kHz; DSD (Dop): ~ 5.6 MHz
• USB-DAC function: 44.1 kHz ~ 384 kHz / 16 bit, 24 bit, 32 bit; DSD 2.8 MHz, 5.6 MHz, 11.2 MHz
• Output level: Unbalance 2.1 Vrms / Balance 4.2 Vrms (condition no load)
• Output impedance: Balanced Out 2.5 mm (1 Ω) / Phones 3.5 mm(2 Ω)
• Frequency characteristic: ±0.062 dB (Condition: 20 Hz - 20 kHz) Unbalance / ±0.061dB (Condition: 20 Hz - 20kHz) Balance; ±0.68dB (Condition: 10 Hz - 70 kHz) Unbalance / ±0.67 dB (Condition: 10 Hz - 70 kHz) Balance
• Signal-noise ratio: 120 dB @ 1 kHz, Unbalance / 123 dB @ 1 kHz, Balance
• Stereo cross-talk: 138 dB @ 1 kHz, Unbalance / 144 dB @ 1 kHz, Balance
• THD+N: 0.0007% @ 1 kHz, Unbalance / 0.0006% @ 1 kHz, Balance
• IMD: 0.0004% 800 Hz 10 kHz (4:1) Unbalance, Balance
• Clock jitter: 25ps (typ)
• Reference clock jitter: 200 fs (VCXO cłock)

Power supply:

• Battery: Built-in lithium polymer battery (3,300 mAh / 3.7 V)
• Auto-off function: Auto power off (when no operation is made), backlight off (when no operation is made), sleep timer
• Charging method: Charging only (with power supply turned off), charging and playback and data transfer

USB:

• Shape: USB Type-C (charging, data transfer)
• Connection method: MTP (media device) method

Screen:

• Display: 4.1" TFT color LCD (electrical capacitance touch screen)
• Resolution: HD (720 x 1280 px)