Radius RK-DA50CK Portable DAC Amplifier High Resolution.

(released on November 30th, 2020 in Japan)

It is sent from JAPAN by AIRMAIL with TRACKING NUMBER.

Description:

• Equipped with Qualcomm's high-quality IC "WHS9415"

  "WHS9415" is an IC equipped with a high-quality Qualcomm Aqstic DAC. The Qualcomm Aqstic DAC is an excellent audio DAC with a wide dynamic range, low distortion, and high frequency response characteristics, despite the extremely low current consumption. In addition, "WHS9415" performs signal processing from USB input to headphone output by itself. By adopting this IC, efficient board design and miniaturization became possible, and a compact housing shape was realized. The "WHS9415" is also equipped with a high-precision PLL, and has a time error of ± 0.1 [MCLK) of two types of master clock signals (MCLK) of 9.6 [MHz] and 11.2896 [MHz] from an external crystal oscillator of 38.4 [MHz]. Generated by [ppm (*)]. MCLK is switched between a 48 [kHz] type sound source and a 44.1 [kHz] type sound source for playback. The jitter component (fluctuation) of MCLK generated internally is eliminated as much as possible, and high-precision D / A conversion is realized.

• Consolidate know-how in high-resolution audio product development

  The compact and lean design centered on "WHS9415" thoroughly eliminates noise and distortion that may occur on the board. It shows excellent characteristics even in the playback frequency range, and can play back all the corresponding high-resolution audio sources. In addition, regardless of impedance, we bring out the potential of various earphones and headphones including our products. When the signal level is low, the power supply voltage is dropped to suppress the power supplied to the headphones, and when the signal level is high, the power supply voltage is raised to supply more power. It operates efficiently according to the magnitude of the signal level and reduces the current consumption of the connected device. Also, by generating a negative power supply voltage internally, the DC component is eliminated from the audio signal. This eliminates the need for a large-capacity capacitor between the amplifier output and headphones that affect the bass range, so the bass range sound is faithfully reproduced.

• Twisted cable using high-purity single crystal copper

  The cable is a twisted cable of single crystal copper and silver-plated single crystal copper. Single crystal copper is an extremely high-purity conductor with excellent conductivity that eliminates grain boundaries (gap between crystals) in the signal transmission direction by a special casting method and reduces the mixing of impurities. Silver plating improves the appearance and prevents the conductor from deteriorating due to heat during the insulation process. Achieves higher S / N without compromising the excellent electrical characteristics and flexibility of single crystal copper.

• Earphone and headphone remote control can also be operated

  It conforms to the specifications of Android Open Accessory Protocol 2.0, and can operate without impairing the remote control functions (play / stop, volume up / down, incoming call answering, etc.) even when earphones or headphones are connected.

• Easy to enjoy "NeSTREAM"

  "NeSTREAM" is a high-quality, high-quality specialized streaming video playback application that supports simultaneous playback of high-resolution audio up to 24bit / 192kHz and 4K video. By using this product, you can watch high-resolution audio even on PCs and smartphones that do not support high-resolution sound sources, and you can enjoy high-quality artist live video and VOD distribution on familiar mobile terminals.
• ● Body color: Black
  ● Supported formats: PCM: 24bit / 192kHz
  ● THD + N: <0.0005% [@ 1kHz, 16Ω]
  ● S / N ratio: 123dB [@ 16Ω, A-weight]
  ● Playback frequency range: 20Hz ~ 90kHz (0dB / -0.5dB) [@ 16Ω]
  ● Maximum output: 0.9Vrms [@ 0dBFS, 16Ω]
  ● Impedance: 16Ω to 600Ω
  ● Input: USB Type-C plug
  ● Output: Φ3.5mm stereo mini jack
  ● Mass: 6g
  ● Accessories: USB Type-C to A conversion adapter, instruction manual / warranty card

Please contact me if you have any question about this item.