
Tune Three from hARt Lab is a hybrid power amplifier with driver tubes and a MOSFET output stage. A 2-channel power amplifier in Dual Mono configuration, Tune Three is designed to combine the best of vacuum tubes and solid-state transistors in one package. Featuring a tube voltage amplifier and a MOSFET trans-impedance amplifier in a unique circuit topology with matched components, this power amplifier offers an outstanding listening experience with no limitations. The total absence of feedback allows for absolute purity of the amplified signal. Built with the best available vacuum tubes and audio grade elements.
When paired with the Tune Two preamplifier, you have a true audio reference system of high aesthetics, functionality and driving capabilities.


Users can select from 15 available colours for the front illumination to match the aesthetics of the listening space. Illumination can be dimmed over 3 levels or turned off completely.
Removable side panels for individual appearance, by changing color and/or material.
Wave dampening optimised chassis design for both enhanced flexibility and stiffness.
FloatO integrated anti-resonance feet for a quieter background and extended sound dimensionality.
Amorphous wooden fibreboard chassis dampens unwanted vibrations and mechanical noise feedback, eliminating crosstalk and resulting in a lower noise floor.
High-end MlCoat painting procedure. An ultra-refined process using multiple coats of paint offering a smooth, scratch resistant surface.
Removable side panels allowing for customisation of appearance by changing colour and/or material.
A fusion of production methods, subtractive manufacturing (CNC) and additive manufacturing (3d-printing), along with a mix of materials (wood, metal, plastic, rubber), allows for stunning looks and unrivalled music playback.
VAcc battery emulator with custom wound mains transformers for a power supply unaffected by network fluctuations.
Dual mono audio configuration with GStar single common earth point for total immunity from mains noise and ground loops.
Single Class-A tube amplification driver stage with 2x CV181 (or equivalent), light polarized and with no feedback.
High current MOSFET output stage.
| Rated Power | 2 x 165 Wrms in 8 Ohm 2 x 275 Wrms in 4 Ohm |
| Sensitivity (for Max. Power) | 3.4 Vrms |
| Frequency Response | 5 Hz – 100 kHz |
| Power Consumption | 2 W standby, 200 W idle |
| Dimensions | 200 x 430 x 410 mm (HxWxD incl. jacks) |
| Weight | 32 kg |
| Shipping Dimensions | 310 x 550 x 490 mm (HxWxD) |
| Shipping Weight | 42 kg |
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