Ο Hart Lab Tune Four ειναι dual mono προενισχυτης με λυχνιες (2x CV181) class A. Απόκριση συχνότητας: 5 Hz - 140 kHz. Διαθετει DAC, Phono και ενισχυτη ακουστικων.

Εγγυηση Αντιπροσωπειας. Δυνατοτητα δοσεων, ανταλλαγων.

hARt Lab Tune Four preamplifier

The Tune Four is a Preamplifier with Streamer, DAC, Phono and Headphone amplifier.
It builds on roots of Tune Two to takes the listening experience to an even higher level. The best volume attenuation technology with the best elements and unique dual vacuum tube topology provide an enhanced audio signal capable of driving any combination of cables and power amplifiers. Tune Fourt provides all modern conveniences with multiple options for digital and analog playback.

Designed around a Class-A vacuum tube amplification stage, with the best components in current audiophile production. The selection was made after extensive listening sessions and without cost constraints. With the addition of parallel tubes, the Tune Four catapults performance to dizzying heights. With great looks and simplified control using any modern web browser, this preamp will give you a true audio experience.

Features

• Use of dual vacuum tubes in TiPD circuit for superior performance
• Amplification of a Class-A stage with 2x CV181 (or equivalent) vacuum tubes, photodiode biased and without any feedback, provides excellent linearity and superior sound output. Optionally combined with a Class-A buffer it forms a hybrid arrangement, which enhances driving capabilities without compromise, for any power amplifier and interconnect cables.
• Alternate direct vacuum tube output for clean signal and ultimate performance.
• VAcc battery emulator with 12 individual, fully separated power supplies for digital and analog audio, and digital control.
• Dual Mono architecture with a single common GStar ground point for full protection against mains noise and ground loops.
• Attenuator (volume control) SLadd based on relais with 64 steps of 1 dB provides constant input impedance and achieves zero tracking errors and interactions between left and right channels, which results in an excellent sound stage.
• Acrylic back panel with local source switching for minimal audio signal path.
• Suspended power supply effectively decouples power transformers from sensitive audio circuits.
• FloatO built-in absorbent mounts for a quieter background and extended sound dimension.
• Built-in DAC with coaxial and optical inputs, where the signal is converted only in terms of sample rate (bit-perfect) and re-clocked for optimal performance.
• High-drive headphone amplifier. Tube-MOSFET, Class-A hybrid design for great sound.
• Fully configurable Class-A phono stage for MM and MC heads. Discrete active circuit design for excellent accuracy.
• Superior selection of audiophile components without cost constraints.
• The user can choose one of the 15 available colors to match the aesthetics of the environment or even turn it off completely.
• Simple Unified Management. Tune Four is controlled from any modern web browser running on any device such as smartphone, tablet, computer, etc.
• Standard infrared remote control for main functions.
• Integrated media player with wireless and ethernet connection, functions and settings for digital audio and USB ports for external HDD/USB-stick.

Specifications

• Inputs: 4x line, 1x phono, 1x media player (with WLAN, LAN and 3 USB ports), 1x digital coaxial and 1x optical
• Outputs: 1x hybrid, 1x direct tube and 1x headphone 6.35 TRS
• Phono settings: Gain: MM: 40 dB, MC: 66 dB. Load, resistive: 47 kΩ, 470 Ω, 220, 150, 100, 82, 70 and 60 Ω and capacitive: 100, 250, 330, 430 and 480 pF
• Line level gain: 21 dB
• Frequency response: 5 Hz - 140 kHz
• Recommended load Hybrid: >16 Ω, Direct: >30 kΩ, Headphone 16-600 Ω
• Power consumption: 2 W standby, 60 W idle
• Net dimensions: (HxWxD in mm): 200 (with cover) x 430 x 390 (including terminals), weight: 12 kg
• Shipping dimensions: (HxWxD in mm): 310 x 550 x 490, weight: 22 kg