R2R+1bit Dual Structures - A New Benchmark For Portable DAC & AMP’s
The D17 utilises our in-house developed discrete R2R and 1bit 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 analogue presentation, offering a unique lively listening experience. Our in-house developed 1bit DAC employs 8 sets of 8E, totalling 64 PWM-DACs, delivering a landscape of rich musical details and extremely high resolution audio playback.
Four-channel Fully Balanced Symmetric Architecture R2R with 284pcs Ten-thousandth High-precision Resistors
The D17 adopts a four-channel fully balanced symmetrical R2R architecture, meticulously selected 284 ultra-precise film resistors with a tolerance of one ten-thousandth. Equipped with our in-house developed hardware resistor compensation circuitry and software compensation algorithms, the D17 achieves a THD+N of -104dB in R2R mode, outperforming mainstream R2R devices by over ten decibels and competes with various flagship R2R desktop DACs. R2R decoding offers a rich analogy voicing, producing a warm, delicate sound with exceptional musicality.
64 PWM-DAC, 1bit Architecture - Opening the Door to Acoustical Realism
In 1bit mode, the four channels L+, L-, R+, and R- each have 16E, totalling 64 PWM-DAC units working together. 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 synchronised. This not only achieves an impressive THD+N of -114dB but also significantly enhances sound detail and density.
FPGA-Master 3.0 Inside - Nanosecond-level Precise Control, Global Clock Regeneration
The D17 is equipped with iBasso's in-house developed FPGA-Master 3.0 architecture, deeply integrated with two Accusilicon ultra-low 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 1bit 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.
Dual Korg 6P1 Nutubes - 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 steady and powerful source of power. As a result, the D17 can deliver over 1200mW + 1200mW at 32Ω, easily driving a wide range of flagship IEMs and high-impedance headphones.
Three-layer Composite Seismic Isolation System - Secondary Reduction of Microphone Effect
The D17 adopts a composite isolation system composed of a double-layer PCB combined with damping materials. The two PCB layers are connected via pin connectors, effectively dispersing and attenuating lateral stress and significantly reducing resonance. The tube is placed on the second PCB layer using damping materials, providing a secondary reduction of microphone effects. Actual measurements show that the microphonic effect is below the human ears’ perceptual threshold. Among all iBasso tube amplifier products, it consistently performs at the forefront.
Dual Battery Architecture Demonstrates Solid Power - Pure Sound Quality Performing at Top Levels, Including Complex Passages
The D17 features a dual battery power supply architecture, with the DAC and headphone amplifier powered by separate batteries. This dual architecture ensures that the headphone amplifier section receives a stable current supply while effectively isolating digital interference. Whether under high gain or heavy load, the D17 can consistently maintain a pure and stable output, significantly reducing distortion caused by unstable power supplies. It truly delivers a clear and pristine sound quality, capable of presenting your recordings with the utmost musical quality.
24 Position 4 Section Stepped Attenuator - Analogue & Digital Volume Controls
The D17 supports both analogue and digital volume adjustments. The analogue volume uses iBasso’s 24-position 4-section stepped attenuator, which is only one-tenth the size of the traditional stepped attenuator while retaining all their advantages. The difference between the left and right channels is less than +/- 0.1dB. Digital volume adjustment is performed via a professional DSP module. The combination of analogue and digital volume control allows for more precise volume output.
