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EarStudio ES100-24bit Portable High-Resolution Bluetooth Receiver/Headphone Amp/DAC with AAC, aptX, aptX HD (Black)


24,699.00 14,051.98

(as of 03/22/2019 at 10:40 UTC)


EarStudio supports Qualcomm’s aptX HD codec, which allows you to stream 24bit hi-res music wireless. EarStudio automatically enhances 16bit music into 24bit sound. We use CSR 8675 Qualcomm Chip and 2x DACs of AK4375a. Noise free, jitter free. EarStudio ES100 reproduces sound over Bluetooth through Radsone’s patented DCT technology which reduces subtle digital noise and cleans the jitter from Bluetooth streaming. Dual DACs with analog volume control EarStudio has optimized circuit architecture, proprietary DualDrive technology, using 2 independent Hi-Fi DACs and Amplifiers. Unlike other dual DAC audio systems, the fully differential audio signal path directly goes to the output jack, with NO switch components in the way, delivering pure signal without any loss or distortion, and with enough power. Moreover, 2 selectable operating modes support 2x current or 2x voltage, as needed by depending on the type of connected headphones. Then, we took a further step for details by adopting an analog volume control. Digital volume adjustment has the downside because it scales down PCM audio sample before the D/A conversion, resulting in harsh sound and the loss in sound detail, SNR, as well as THD. EarStudio offers analog volume control to keep the optimal audio performance even at low volume level using Programmable Gain Amplifier (PGA) which is the best way to control the volume. Full Balanced and single ended output EarStudio offers two outputs: A single-ended/double current 3.5mm jack and full-balanced/double voltage 2.5mm Jack. Note: For headphones with the high impedance over 200~600-ohm, ES100 may not be able to deliver enough sound pressure level, especially with 3.5mm unbalanced output. Please note the maximum output power level of ES100 for your high impedance head units.


  • 24bit Bluetooth receiver designed to deliver studio-quality sound through your ears WIRELESS – using your existing wired headphones, earphones or even speakers.
  • Dimension 1 x 2 x 0.5 inch / Weight 20g / 14 hours of continuous playback / Dedicated app featured with 10 band EQ and Ambient mode / USB audio playback / device firmware update
  • Including 2 independent Hi-fi DACs and Amplifiers (Asahi Kasei AK4375a) – the optimal Dual DACs/AMP design for both single-ended and full-differential outputs

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