Preamplificator Stereo High-End Audionet Stern

Preamplificator Stereo High-End Audionet Stern

The STERN preamplifier, conceived and built by Audionet and designed by legendary German industrial designer Hartmut Esslinger, combines globally acclaimed circuit concepts with a design quality that has never been even remotely realized in high fidelity.

Maximum concentrated, internationally protected FLOATING PANE DESIGN embodies ultimate audiophile qualities. And STERN’s sound surpasses all previous solutions (even the AXPONA/RMAF/THESHOW/HIGHEND series winner Audionet Pre G2).

STERN goes straight to the core without detours, steps or loops. STERN is a sonic revelation for audiophile listeners. STERN effortlessly nails even the most expensive competition against the wall. STERN is simply “acoustically and visually the greatest sensation that has ever been” in the absolute top class.

Special features 

• Magnetic and capacitively optimized circuit and device design without the use of ferromagnetic materials.
• Floating pane design with optimal microphonic resistance and temperature stability.
• Floating housing plates, resonance-optimized on a solid aluminum frame.
• Transformer suspension and screw connections are made of stainless steel.
• Dual mono circuitry and power supply design for maximum channel separation.
• Air Flow Design PCBs for optimized cooling and stabilization of quiescent currents.
• Separation and galvanic isolation of all analog circuits using optocouplers.
• Input and output circuitry as well as voltage stabilization are implemented with discrete, further developed Audionet operational amplifier modules with state-of-the-art mica capacitors.
• Rhodium RCA sockets from Furutech.
• Volume rotary encoder with double ball bearings, magnetic grid and optical scanning.
• Volume adjustment via an electronically switched and real-time linearized precision resistance network.
• DC coupling without sound-damaging capacitors or coils, shortest signal paths.
• One transformer per channel to supply the positive and negative half-wave for the perfect voltage supply.
• Four encapsulated and decoupled 50 VA toroidal transformers.
• Main current capacitors 22,000 µF ESR-optimized with silk dielectric.
• Total sieve capacity 176,000 µF.
• New contextual operating concept.
• Microprocessor control with its own power supply.
• Bypass mode for home theater integration.
• Additional devices from the Ultimate series can be switched on remotely via two pulsed Audionet-Link circuits
• A microprocessor with its own switching power supply monitors and controls all functions and provides information via a high-resolution display.
• The inputs can be freely named and different input levels can be adjusted.
• DC components of source signals can optionally be adjusted.
• Rhodium fuse

Function

Microprocessor controlled Ultimate Linear preamplifier.

Connections

Inputs:

• 4 pairs of RCA lines, rhodium (Furutech)
• 2 pairs of XLR balanced, gold-plated (Neutrik)
• 1 D Sub 9 serial interface RS232 (only for control)
• 1 SMA for WLAN (only for control)

Outputs:

• 2 pairs of Cinch line, rhodium (Furutech)
• 1 pair of Cinch inverting, rhodium (Furutech)
• 2 pairs of XLR balanced, gold-plated (Neutrik)
• 2 Audionet Link, optical
• 1 screw connection, gold-plated, for earth connection

Measurements

Frequency response: 0-2,200,000 Hz (-3 dB), DC coupled/ 0.3-2,200,000 Hz (-3 dB), AC coupled
THD+N: <-104 dB for 20 kHz/ <-116 dB for 1 kHz
SNR: > 123 dB at 4V RMS
Channel separation: >144 dB, 20-20,000 Hz
Output impedance: 24 Ω real (Cinch Line)/ 48 Ω real (XLR)
Output current: max. 60 mA
Power consumption: < 0.5 W standby, typ. 100 W
Mains connection: 220…240 V or 110…120 V, 50…60 Hz, rhodium (Furutech)
Dimensions:
-Vertical: Width 270 mm/ Height 500 mm/ Depth 505 mm
-Horizontal:  width 450 mm/ height 320 mm/ depth 505 mm
Weight: 38kg

Execution

Color: Silver or black
Display: Bright or dark color TFT display
Format: Horizontal or vertical