Nešiojamas DAC ir stiprintuvas iBasso D17 Atheris, R2R + 1bit Dual Discrete DAC, Dual Nutubes AMP

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Prekė: Nešiojamas DAC ir stiprintuvas iBasso D17 Atheris, R2R + 1bit Dual Discrete DAC, Dual Nutubes AMP. Kategorija: Ausinių stiprintuvai.

• Gamintojas: iBasso
• Modelis: D17 Atheris

Portable Tube DAC/AMP

Main Features:

• 284 precision foil resistors with a low temperature coefficient of 0,01% (25 ppm)
• Two Nutube 6P1 vacuum tubes with a lifespan of up to 30 000 hours
• Custom 24-position 4-section step potentiometer with tolerance between channels less than +/- 0,1 dB
• Two Accusilicon crystal oscillators with ultra-low phase noise and femtosecond frequency
• Professional DSP audio chip with theoretical dynamic range up to 192 dB and THD+N up to -174 dB
• Analog power supply with ultra-low noise of only 0,6 μV, which is lower than 0,8 μV for Linear Technology LT304x
• Dual battery architecture, with separate batteries powering digital and amplifying sections
• Original foil capacitors iBasso and vintage brand SPRAGUE
• 1,3 inch OLED display

R2R+1bit Dual Structure

New reference point for portableś converteróin digital-to-analog and amplifiers słhandle

The D17 uses a discrete R2R converter developed by iBasso and a 1-bit digital-to-analog converter. It is equipped with a four-channel, fully balanced, symmetrical R2R digital-to-analog converter with discrete components, using a total of 284 high-precision foil resistors with an accuracy of 0,01%. The R2R decoding delivers a natural, gentle sound with a natural analog presentation, offering a unique, vibrant listening experience.

Developed in-house by iBasso, the 1-bit digital-to-analog converter uses 8 sets of 8E, a total of 64 PWM-DAC converters, providing a rich landscape of musical detail and extremely high resolution audio playback.

D17 can work in three modes:

1. NOS Mode（PCM uses 1bit DAC） for R2R DAC，DSD decoding
2. All to R2R（OS mode，all to PCM format）
3. All to 1bit（SD mode，all to DSD format）

Four-channel, fully balanced, symmetrical R2R architecture with 284 pcs. high precision resistors

The D17 uses a four-channel, fully balanced, symmetrical R2R architecture and 284 carefully selected, ultra-precise foil resistors with a tolerance of one ten thousandth. Equipped with a hardware resistance compensation circuit developed by iBasso and software compensation algorithms, the D17 achieves THD+N of -104 dB in R2R mode, outperforming popular R2R devices by more than ten decibels and competing with various flagship R2R stationary digital-to-analog converters. The R2R decoding provides rich analog sound, creating a warm, gentle sound with exceptional musicality.

64 PWM-DAC, 1-bit architecture

Opening the door to acoustic realism

In 1-bit mode, four L+, L-, R+ and R- channels have 16E each, resulting in a total of 64 PWM-DAC units working together. Controlled by FPGA-Master 3.0 with precise management of input/output delays at the nanosecond level, compensating for “wiring delay” to ensure alignment and tight synchronization of the signal reaching the DAC. This not only achieves an impressive THD+N ratio of -114 dB, but also significantly improves the detail and density of the sound.

FPGA-Master 3.0

Precise control at nanosecond level, Global clock regeneration

The D17 is equipped with iBasso’s FPGA-Master 3.0 architecture, deeply integrated into two Accusilicon ultra-low phase noise femtosecond oscillators to create a clean, unified clock source. With precise nanosecond latency control and real-time clock regeneration technology, the system can simultaneously compensate for R2R decoding and 1-bit decoding, reducing clock fluctuations and distortion to a very low level. This ensures that the sound is reproduced extremely accurately, ensuring that every detail is presented in its original form.

Double lamps Korg 6P1 Nutubes

Fully balanced headphone amplifier with incredible power

Two Nutube 6P1 tubes in the D17 model give the sound a unique tube character and a warm, gentle, yet dynamic texture. The anode is powered by a high voltage of 24 V, which ensures better linearity. Combined with a high-performance buffer amplifier, the TI BUF634A provides a stable and powerful power source. As a result, the D17 can deliver more than 1200mW + 1200mW at 32Ω, easily supporting a wide range of flagship in-ear headphones and high-impedance headphones.

Three-layer composite seismic insulation system

Additional reduction of microphone effect

The D17 uses a composite insulation system consisting of a double-layer circuit board combined with damping materials. The two layers of the circuit board are connected by pin connectors, which effectively disperses and suppresses lateral stresses and significantly reduces resonance. The tube is placed on the second layer of the circuit board using damping materials, which provides additional reduction of microphone effects. Actual measurements show that the microphone effect is below the threshold of human ear perception. Of all tube amplifiers, the D17 model from iBasso is at the forefront.

Construction based on two separate batteries.

The D17 model has a dual battery power architecture, in which the digital-to-analog converter and headphone amplifier are powered by separate batteries. This dual architecture provides stable power to the headphone amplifier section while effectively isolating digital interference. Whether operating at high gain or under heavy load, the D17 can consistently maintain a clean and stable output signal, greatly reducing distortion caused by unstable power supply. It delivers truly clear and pristine sound quality, allowing you to play recordings with the highest music quality.

24 position, 4 section step potentiometer

Analog & digital regulation głośności

The D17 supports both analog and digital volume control. The analog volume control uses the 24-position, 4-section iBasso step potentiometer, which is only one-tenth the size of a traditional step potentiometer, while retaining all its advantages. The difference between left and right channels is less than +/- 0,1 dB.

Digital volume control is carried out using a professional DSP module. The combination of analog and digital adjustment allows for more precise volume setting.

R2R digital-to-analog converter

Balanced 4,4 mm headphone output:

• Output Level: 7 Vrms (AMP H Reinforcement + DAC H Reinforcement)
• Output power: 1200 mW + 1200 mW at 32 Ω (distortion 1%)
• THD+N: -76 dB (tube gain)
• SNR: 116 dB (AES17-20K with A-weight)
• Dynamic Range: 116 dB (AES17-20K with A weighting)
• Crosstalk: 129 dB
• Frequency Response: 15 Hz – 22 kHz at -1 dB; 15 Hz – 40 kHz at -2,5 dB
• Output Impedance: 1,9 Ω

Headphone Output (Phone Out) 3,5 mm:

• Output Level: 3,5 Vrms (AMP H Reinforcement + DAC H Reinforcement)
• Output power: 320 mW + 320 mW at 32 Ω (distortion 1%)
• THD+N: -70 dB (tube gain)
• SNR: 112 dB (AES17-20K with A-weight)
• Dynamic Range: 112 dB (AES17-20K with A weighting)
• Crosstalk: 125 dB
• Frequency Response: 15 Hz – 22 kHz at -1 dB; 15 Hz – 40 kHz at -2,5 dB
• Output Impedance: 1 Ω

Linear output symmetrical 4,4 mm:

• Output level: 2,4 Vrms (low gain digital-to-analog converter)
• Output level (high gain): 4 Vrms (high gain of digital-to-analog converter)
• THD+N: -104 dB
• SNR: 126 dB (AES17-20K with A-weight)
• Dynamic Range: 126 dB (AES17-20K with A-weight)
• Crosstalk: 120 dB
• Frequency Response: 15 Hz – 22 kHz at -1 dB; 15 Hz – 40 kHz at -2,5 dB

Linear output 3,5 mm (Single-End):

• Output Level (Low Gain): 2 Vrms
• Output Level (High Gain): 2,4 Vrms
• THD+N: -103 dB
• SNR: 120 dB (AES17-20K with A-weight)
• Dynamic Range: 120 dB (AES17-20K with A-weight)
• Crosstalk: 100 dB
• Frequency Response: 15 Hz – 22 kHz at -1 dB; 15 Hz – 40 kHz at -2,5 dB

1-bit digital-to-analog converter

Balanced 4.4mm headphone output:

• Output Level: 3,5 Vrms (AMP H Reinforcement + DAC H Reinforcement)
• Output power: 340 mW + 340 mW at 32 Ω (THD 0,5%)
• THD+N: -76 dB (tube gain)
• SNR: 109 dB (AES17-20K with A-weight)
• Dynamic Range: 109 dB (AES17-20K with A-weight)
• Crosstalk: 123 dB
• Frequency Response: 15 Hz – 22 kHz (-1 dB); 15 Hz – 40 kHz (-2,5 dB)
• Output Impedance: 1,9 Ω

Headphone Output (Phone Out):

• Output Level: 1,7 Vrms (AMP H Reinforcement + DAC H Reinforcement)
• Output power: 87 mW + 87 mW at 32 Ω (THD 1%)
• THD+N: -70 dB (tube gain)
• SNR: 104 dB (AES17-20K with A-weight)
• Dynamic Range: 104 dB (AES17-20K with A-weight)
• Crosstalk: 118 dB
• Frequency Response: 15 Hz – 22 kHz (-1 dB)
• 15 Hz – 40 kHz (-2,5 dB)
• Output Impedance: 1 Ω

Linear output symmetrical 4,4 mm

• Output level: 2 Vrms (low gain digital-to-analog converter)
• Output level: 2,4 Vrms (high gain of digital-to-analog converter)
• THD+N: -114 dB
• SNR: 118 dB (AES17-20K with A-weight)
• Dynamic Range: 118 dB (AES17-20K with A-weight)
• Crosstalk: 120 dB
• Frequency Response: 15 Hz – 22 kHz (-1 dB); 15 Hz – 40 kHz (-2,5 dB)

Linear output 3,5 mm (Sinle-End)

• Output level: 1 Vrms (low gain digital-to-analog converter)
• Output level: 1,2 Vrms (high gain of digital-to-analog converter)
• THD+N: -110 dB
• SNR: 114 dB (AES17-20K with A-weight)
• Dynamic Range: 114 dB (AES17-20K with A-weight)
• Crosstalk: 100 dB
• Frequency Response: 15 Hz – 22 kHz (-1 dB); 15 Hz – 40 kHz (-2,5 dB)

Input connectors:

• USB-C (DATA): Supports PCM 768kHz/DSD512
• 3,5 mm coaxial (COAX): supports PCM 768 kHz / DOP256
• 3,5mm optical (Mini Toslink): support PCM 192kHz/DOP128

Output connectors:

• 4,4 mm balanced PO, 4,4 mm balanced LO
• 3,5 mm (Single-End) PO, 3,5 mm (Single-End) LO
• USB-C (Charging): Supports 5V/3A and QC3.0 fast charging.

• Charging time: 3 hours
• Playtime: up to 15 hours
• Dimensions: 145 mm x 86,3 mm x 31,6 mm
• Weight: 470 g

Specifications