Astell & Kern AK320
Brand Astell & Kern
The primary goal of Astell&Kern has always been to deliver the original sound, and we believed that the AK380 did just that. We wanted even more people to experience the AK320 and its ability to deliver the original sound as intended.
AK4490’s Dual-DAC, DSD-to-PCM Playback, Parametric EQ with 20bands 0.01dB, 200 Femto Second VCXO Reference Clock,
Exceptional Expandability, DLNA-based AK Connect App and Metal Touch Sensor Home Button
PEQ (Parametric EQ)
A parametric equalizer (PEQ*1) was implemented in the AK320 to deliver detailed adjustment of the original sound, and an audio digital signal processor (DSP) was added to aid in this process.
This frees up CPU cycles previously needed for calculating graphic equalizers (GEQ), allowing more detailed and accurate calculations via the dedicated DSP.
The audio DSP expands the existing 10-band, ±0.5 dB graphic equalizer (GEQ*2) to 20-band, ±0.01 dB to more precisely adjust the frequency and gain (dB) as well as more accurately specifying the frequency range via Q value adjustments.
* The PEQ supports up to 8 kHz - 192 kHz (8/16/24-bit) formats, but DSD and 32-bit audio are not supported.
Equipped With a Femto Clock to Deliver True Original Sound
Astell&Kern implemented a voltage-controlled crystal oscillator (VCXO) high-precision clock with a reference jitter value of 200 femto seconds*3. Femto clocks are commonly used in high-end audio systems, and the clock is measured in high-precision femtosecond units(one quadrillionth of a second).
What is VCXO?
A VCXO, or a voltage-controlled crystal oscillator, is a type of crystal oscillation device that creates oscillation frequencies.
External environmental stimuli, which in this case mean voltage inputs, influence the frequency value. Adjustments to the voltage input tunes a precise frequency value.
What is Jitter?
Jitter refers to the undesired deviation in time that occurs in a periodic signal.
In this case, jitter is the error that occurs in the reference clock required to perform the sampling in digital audio equipment.
By utilizing a femto clock, the AK320 is able to create a more accurate frequency value and make fine jitter corrections. As a result, the AK320 faithfully reproduces analog sound closer than ever to the original source when transmitting a digital signal as an analog signal.
The AK320 supports USB DAC functionality.
The AK320 can be connected to a PC or Mac via USB for use as a USB DAC that supports PCM/DSD. When playing back music stored on a PC or Mac, the Dual-DAC is able to deliver richer audio of outstanding soundstage and resolution well beyond the limits of a built-in sound card.
±0.56dB (Condition: 10Hz~70kHz) Unbalance / ±0.55dB (Condition: 10Hz~70kHz) Balance