aune S17 Pro Pro Fully-Discrete Class-A Headphone Amplifier

Aune S17 Pro Full Balanced Class-A Twin JFET R2R Powerful HiFi Lossless Audiophile Desktop Headphone Amplifier

Description

Twin JFET, Class A, current adjustable, R2R volume

As Aune’s new generation of fully-discrete class-A headphone amp, the S17 Pro has the features of twin JFET, R2R volume control, 2 levels of current to select from (50mA/ 100mA class-A quiescent current per transistor), output power as high as 7.5W, 3 groups of headphone outputs + 2 groups of preamp outputs, etc. It is a high-performance rich-sounding head phone amplifier with high power.

Twin JFET, tube-Like sound

JFET has high input impedance and rich and mellow sound like the vacuum tube. As for the S17 Pro, it's not just JFET. It' S TWIN JFET, whose temperature rises are the same, performances are the same, and the mid-point voltage is stable. It is the ideal input transistor of a headphone amp.

Two transistors per channel powerful

The S17 Pro final output stage uses two pairs of output transistors in parallel. The whole device has as many as 16 output transistors. Max output is 7.5W. It can drive all kinds of headphones and IEMs with ease.

R2R electronic volume chip, precise, and more

The S17 Pro uses the R2R electronic volume chip from JRC and the dedicated op-amps to build the 4-way balanced R2R volume control. It is high control precision, great channel balance, wide soundstage, accurate positioning.

Two colors to present current level and temperature clear at a glance

The brand new UI of the S17 Pro uses two colors to present the current level and the temperature, making the display clear at a glance.

(An actual measurement example: room temperature 25°C with high current mode, 24 hours continuous work, internal heat sink 66°C, chassis 50°C, knob 43°C).

*100mA Screen

(In 100mA mode, there will be a slow temperature rise, which is a normal phenomenon. The overheat protection will auto switch the current to 50mA when the temperature reaches 69°C.)

Two gain levels, drive your headphones and IEMs well and properly

The S17 Pro has two gain levels, and has set different output amplitudes. The low gain takes advantage of the Class-A amp's feature that the transistors are always working in the linear area, to drive the IEMs well and properly, while the high gain is as high as 7.5W and thus can drive headphones well with big power.

Complex cooler structure, stable Class-A

The class-A amp's transistors are always working in the linear area, which causes a lot of heat. Aune's industrial designer built a complex three-dimensional structure, making the heat sink on the transistor + heat plate at the bottom + chassis form a whole cooler system. And the heat goes out through the rear plate heat emission holes. The class-A’s stability is thus guaranteed.

50W low-ripple toroidal transformer + 19200μF capacitor array, enjoy the richness

The S17 Pro uses the 50W low-ripple toroidal transformer and dual-power design. Digital control and analog are independent from each other, so the analog part can be free from interference. What's more, it has the 19200μF capacitor array. They together make the S17 Pro so powerful and rich-sounding.

Multi-function knob & all-Aluminum remote, easy & fun to use

The front plate is clean and simplistic, and with the one multi-function knob you can adjust current, gain and volume. Let the listening be pure and easy.

The well-designed all-aluminum remote makes the control even more enjoyable.

Multi-connectivity preamp outputs available

The S17 Pro has 3 headphone outputs, 2 groups of preamp outputs and 2 line inputs, satisfying your needs in different scenarios.

The beauty of Arc and simplicity

The symbolic arc-shape design. Classic, simplistic, aesthetic. Enjoy music with the enjoyable design.

Rigorous HiFi component selection, only for the sound

The components used for the S17 Pro are high-quality ones that are carefully selected, such as the high-quality HiFi electrolytic capacitors, the ceramic capacitors, the organic thin-film capacitors, the communication-grade PCB, etc. Everything is aimed at good sound.

*Main filter electrolytic capacity

*Twin JFET

*FK electrolytic capacity

*3-dimensional cooler structure

*WIMA decoupling capacity

*High-quality SMT capacity

High spec, the basis of excellent sound

Headphone amp output(high gain): 4μV, THD+N: 0.00016%. The excellent hardware performance has laid the solid foundation for excellent sound.

Aesthetic tuning

The tuning is based on real instrument sounds and music pieces referencing, leading to signature that is natural and full of musicality.

Recommended pairing

S10N/S10 Pro Network music player + S17 Pro headphone amp

Specification

Input/output impedance

RCA input impedance: 10kΩ

RCA preamp output impedance: 200Ω

XLR input impedance: 22kΩ

XLR preamp output impedance: 100Ω

XLR/6.35mm/4.4mm headphone output impedance: 1Ω

Single-ended 6.35mm headphone output

Frequency response(20Hz-80kHz): ±0.05dB

THD+N: ˂0.00038@1kHz

SNR: ˃115dB@600Ω

Crosstalk: ˂-105dB@1kHz 600Ω

Balanced XLR headphone output

Frequency response(20Hz-80kHz): ±0.05dB

THD+N: ˂0.00016@1kHz

SNR: ˃116dB@600Ω

Crosstalk: ˂-110dB@1kHz 600Ω

G-L low gain single-ended output

32Ω load, 738mW power

100Ω load, 250mW power

150Ω load, 166mW power

250Ωload, 100mW power

300Ωload, 83mW power

470Ωload, 53mW power

600Ωload, 41mW power

G-L low gain balanced output

32Ω load, 2773mW power

100Ω load, 968mW power

150Ω load, 645mW power

250Ωload, 388mW power

300Ωload, 333mW power

470Ωload, 212mW power

600Ωload, 166mW power

G-L high gain single-ended output

32Ω load, 2020mW power

100Ω load, 675mW power

150Ω load, 453mW power

250Ωload, 273mW power

300Ωload, 228mW power

470Ωload, 245mW power

600Ωload, 114mW power

G-L high gain balanced output

32Ω load, 7507mW power

100Ω load, 2643mW power

150Ω load, 1793mW power

250Ωload, 1089mW power

300Ωload, 908mW power

470Ωload, 580mW power

600Ωload, 453mW power