IBD17

D17

iBasso

Combining ground-breaking innovation with exceptional sound detail, the iBasso D17 Atheris is a portable DAC and headphone amp sporting a dual discrete DAC architecture of R2R and 1-Bit PWM for incredible versatility. With three playback modes, you can choose which DAC structure to send your PCM and DSD audio to, with support for up to 768 kHz PCM / DSD512.The D17 features a balanced 4.4mm and single-ended 3.5mm headphone output, along with a diversity of digital input options including USB-C and either optical or coaxial 3.5mm via a shared input jack. The DAC can output up to a maximum of 1200mW per channel into 32 ohms, allowing it to drive the most demanding IEMs and headphones. The headphone amp sports two Nutube 6P1 tubes, backed by a BUF634A buffer amp, for warmth and musicality. Stepped analog and DSP-based digital volume controls are included. With the 3-layer anti-vibration structure, this DAC is isolated from the microphonic effect, ensuring clean, crystal-clear audio. The D17 Atheris includes 3.5mm and 4.4mm cables, a USB-C cable, a USB-C to Lightning cable, a USB-C to USB-A cable, a pouch, and protective case, and a carrying bag.R2R + 1-Bit Dual Structures The D17 utilizes iBasso's in-house developed discrete R2R and 1-bit DAC. It features a four-channel, fully balanced symmetrical R2R discrete component DAC, utilizing a total of 284 high-precision film resistors with an accuracy of 0.01%.The R2R decoding provides a natural, delicate sound with a natural analog presentation, offering a unique lively listening experience. The in-house developed 1-bit DAC employs 8 sets of 8E, totaling 64 PWM-DACs, delivering a landscape of rich musical details and extremely high-resolution audio playback.Three Selectable DAC Modes NOS mode: PCM utilizes the R2R DAC for decoding, while DSD utilizes 1-bit DAC decodingOS mode: this mode sends all decoding duties to the R2R DAC and sends all audio to PCM formatSD mode: this mode sends all decoding to 1-bit DAC structure and converts all audio to DSD format284 High-Precision Resistors The D17 adopts a four-channel fully balanced symmetrical R2R architecture with 284 meticulously selected ultra-precise film resistors with a tolerance of one ten-thousandth. Equipped with in-house developed hardware resistor compensation circuitry and software compensation algorithms, the D17 achieves a THD+N of -104 dB in R2R mode, outperforming mainstream R2R devices by over ten decibels and competes with various flagship R2R desktop DACs. R2R decoding offers a rich analog voicing, producing a warm, delicate sound with exceptional musicality.1-Bit Architecture In 1-bit mode, the four channels L+, L-, R+, and R- each have 16E, totaling 64 PWM-DAC units working together. This is controlled by the FPGA-Master 3.0 with nanosecond-level precise I/O delay management while compensating for wiring delay to ensure that the signal edges arriving at the DAC are aligned and strictly synchronized. This not only achieves an impressive THD+N of -114 dB but also significantly enhances sound detail and density.FPGA-Master 3.0 Inside The D17 is equipped with iBasso's in-house developed FPGA-Master 3.0 architecture, deeply integrated with two Accusilicon ultralow-phase noise femtosecond oscillators to create a pure, unified single-clock source. Through nanosecond-level, high-precision delay control and real-time clock regeneration technology, the system can simultaneously compensate for R2R decoding and 1-bit decoding, reducing clock jitter and distortion to extremely low levels. This ultimately delivers highly accurate sound reproduction, ensuring that every detail is presented in its original form.Fully Balanced Headphone Amp with Incredible Power The two Nutube 6P1 tubes on the D17 impart a unique tube character and a warm, mellow yet dynamic texture to the sound. The anode is powered by a 24V high-voltage supply, providing better linearity. Paired with the high-performance TI buffer amplifier BUF634A, it ensures a stead