Aune S17 Pro EVO - Class A Headphone Amplifier

Demo unit of the silver Aune S17 Pro EVO Class A headphone amplifier in mint condition!
Sold with a 1-year warranty.

The Aune S17 Pro EVO is a powerful headphone amplifier that can also be used as a preamplifier in a hi-fi system. With discrete components and balanced outputs, the Aune S17 Pro EVO offers exceptional sound quality and versatility.

• Class A headphone amplifier
  
• 3 headphone connections
  
• Discrete components
  
• Fully symmetrical design
  
• R2R volume control
  
• 50-watt linear toroidal transformer
  
• Aluminum remote control

New features in the EVO model:

• Individual switching between the headphone amplifier and pre-out output
• Volume memory function for the headphone amplifier and pre-out output
• Automatic screen saver

Powerful Class A Amplification
The S17 Pro's Class A power stage features a pair of JFET transistors with two levels of current adjustment: 50mA and 100mA per JFET for the headphone outputs, plus two AOPs per output, for a total of 16 AOPs. This results in a warm and detailed sound with very low distortion.

Tube-Like Sound Quality
Dual JFETs deliver tube-like sound. JFETs have high input impedance and a full, smooth sound reminiscent of a tube amplifier. The Aune S17 Pro EVO uses dual JFETs with identical temperature rise and performance, while the midpoint voltage remains stable.

Flexible Gain
With two gain levels, the Aune S17 Pro EVO can drive all types of headphones with impedances from 32 to 600 ohms. The low gain uses the linear range of the Class A amplifier to drive IEMs optimally, while the high gain provides up to 7.5W of output power for demanding headphones.

Advanced Cooling
To manage the heat generated by the Class A amplifier, Aune has developed a complex three-dimensional structure in which the transistor heatsink, the bottom heat plate, and the chassis form a complete cooling system.

User-Friendly Controls
A multifunction knob on the front controls power, gain, and volume. The included aluminum remote control makes operation even easier.

Comprehensive Connectivity S17 Pro offers:

• 3 headphone outputs (6.35mm, 4.4mm balanced, 4-pin XLR balanced)
  
• 2 groups of preamplifier outputs (RCA and XLR)
  
• 2 line inputs (RCA and XLR)

Robust Power Supply
A 50W toroidal transformer with a low noise floor and a large 19200μF capacitor bank provides ample power reserve.

Recommended Combination
Combine the Aune S17 Pro EVO with the Aune S10N music streamer featuring a built-in Sabre 9038Q2M DAC for optimal performance.

Specifications:

Output Power:

• G-L low gain single-ended output:
  32Ω = 738mW
  100Ω = 250mW
  150Ω = 166mW
  250Ω = 100mW
  300Ω = 83mW
  470Ω = 53mW
  600Ω = 41mW
• G-L low gain balanced output:
  32Ω = 2773mW
  100Ω = 968mW
  150Ω = 645mW
  250Ω = 388mW
  300Ω = 333mW
  470Ω = 212mW
  600Ω = 166mW
• G-H high gain single-ended output:
  32Ω = 2020mW
  100Ω = 675mW
  150Ω = 453mW
  250Ω = 273mW
  300Ω = 228mW
  470Ω = 145mW
  600Ω = 114mW
• G-H high gain balanced output:
  32Ω = 7507mW
  100Ω = 2643mW
  150Ω = 1793mW
  250Ω = 1089mW
  300Ω = 908mW
  470Ω = 580mW
  600Ω = 453mW

Input/Output Impedance:

• RCA input: 10KΩ
• RCA preamp output: 200Ω
• XLR input: 22KΩ
• XLR preamp output: 100Ω
• XLR/6.35/4.4 headphone output: 1Ω

6.35mm Single-Ended 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

Physical Specifications:

• Dimensions: 211 x 288 x 63 mm

Included Accessories:

• 1x Power cable
• 1x Remote control (CR1220 battery not included)