Astell&Kern ACRO CA1000 Carryable Headphone Amp

The ACRO CA1000 is a headphone amplifier that combines the functions and portability of a high-performance amplifier and DAP based on Astell&Kern’s fundamental philosophy of delivering original sound. It sets a new standard for headphone amplifiers, providing powerful and clear sound with the features never on any other headphone amplifiers.

Speaker effect when listening through headphones – Crossfeed
In a headphone environment in which the left and right channels are clearly separated, ear fatigue may increase during prolonged listening. The moment you turn on Crossfeed, the experience of crisp, but comfortable sound begins. Crossfeed mixes parts of the original signal from one channel and sends that signal to the opposite channel with a time difference to center the sound image. Through the use of detailed settings such as Shelf Cutoff, Shelf Gain, and Mixer Level, you can set the level of crossfeed according to your listening preferences.

Quad-DAC with high output and noise-free sound
The ACRO CA1000 is equipped with four ES9068AS DACs, providing perfect decoding capabilities with Astell&Kern’s amplifier circuit technology. The clear and overwhelming output expresses the original sound without distortion. 2.5mm, 3.5mm, 4.4mm and 6.35mm output circuits are physically separated by applying tiny, independent relay components. If the signal from each output stage of a high-power headphone amplifier is not blocked properly, this can cause noise interference. ACRO CA1000 boasts a noise-free output with an independent circuit structure by using relays to completely block connectors that are not in use.

FEATURES

• Perfectly drive any headphone/IEM with 4 levels of gain and up to 15Vrms output
• Multiple inputs and outputs provide maximum options and compatibility with all of your audio equipment
• Equipped with ESS ES9068AS Quad-DAC for detailed and balanced sound
• Support for 32bit/384kHz PCM and Native DSD512 playback
• Built-in Battery- Portable amplifier can operate without external power supply
• TERATON ALPHA, the epitome of Astell&Kern audio technology
• Crossfeed support for a more natural acoustic experience with headphones
• Support for the latest Bluetooth 5.0 and wireless 24-bit codecs (Qualcomm® aptX™ HD, LDAC)
• Dual-Band Wi-Fi support for greater wireless connectivity
• ReplayGain that automatically adjusts sound levels across different music tracks
• Silver Plating Shield to minimize noise and interference
• View you screen anywhere with a display adjustable up to 60 degrees

TECHNICAL SPECS

• Display: 4.1 inch 720 x 1280 touch screen
• Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
• Sample Rate PCM: 8kHz ~ 384kHz (8/16/24/32bits per Sample) / DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), DSD512(1bit, 22.4MHz) Stereo
• Output Level (Headphone Out)
• [Low] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load)
• [Mid] Unbalanced 4Vrms / Balanced 8Vrms (Condition No Load)
• [High] Unbalanced 6Vrms / Balanced 12Vrms (Condition No Load)
• [Super] Unbalanced 8Vrms / Balanced 15Vrms (Condition No Load)
• Output Level (RCA Out): 2Vrms (Condition No Load)
• CPU: Quad-core
• DAC: ESS ES9068AS x4 (Quad-DAC)
• Decoding: Support up to 32bit / 384kHz Bit-to-Bit playback
• Headphone Outputs: Unbalanced (3.5mm, 6.35mm) / Balanced (2.5mm, 4.4mm)
• Analog Inputs Outputs
• RCA (Stereo pair) x1
• RCA (Stereo pair) x1
• Digital Inputs
• Outputs Coaxial x1, Optical x1, USB(Type-C) x1
• Optical(3.5mm) x1, USB(Type-C) x1
• Frequency Response
• ±0.024dB (Condition : 20Hz~20kHz) Unbalanced / ±0.018dB (Condition : 20Hz~20kHz) Balanced /±0.048dB (Condition : 20Hz~20kHz) RCA
• ±0.059dB (Condition : 20Hz~70kHz) Unbalanced / ±0.056dB (Condition : 20Hz~70kHz) Balanced / ±0.048dB (Condition : 20Hz~70kHz) RCA
• S/N: 107dB @ 1kHz, Unbalanced / 115dB @ 1kHz, Balanced / 119dB @ 1kHz, RCA
• Crosstalk: -105dB @ 1kHz, Unbalanced / -124dB @ 1kHz, Balanced / -121dB @ 1kHz, RCA
• THD+N: 0.005% @ 1kHz, Unbalanced / 0.002% @ 1kHz, Balanced / 0.0004% @ 1kHz, RCA
• Built-in Memory: 256GB [NAND]
• Charge Time about 2.5 hours (9V / 3A PD2.0 Fast Charging) | 7 hours (5V 2A General Charging)
• Playback Time about 10.5 hours (Standard : FLAC, 16bit, 44.1kHz, Unbalanced, Vol.40, LCD Off, Low Gain)
• Dimensions: 4.12″(104.9mm)[W] x 1.77″(45mm)[H] x 5.85″(148.8mm)[D]
• Weight: about 32.41oz (919g)