PRODUCTS
TECHNOLOGY
There are only two amplification stages in the hARt Lab power amplifier sections
Just Two Amplification Stages:
There is no negative feedback, nor overall or local in any of the hARt Lab designs
Zero Negative
Feedback:
There are no interstage transformers, neither coupling stages in the signal path of the hARt Lab amplifiers
No Transformers in
the Signal Path:
WHO WE ARE
hARt Lab is a team of audiophile engineers who combine their passion for music with their
long experience in design and electronics to develop the finest chassis with the best circuits
for each device. Each piece is made by hand with materials that justify it.
We believe that matching amplifiers with loudspeakers is the most challenging act in building
a music playback chain. With this in mind, we decided to create the best amplifiers for this purpose and we invite you to rediscover your beloved loudspeakers!
The constant pursuit of perfection is a journey that determines the existence of hARt. Harmonic audio reference tunes are the quintessence of our purpose. We hope to indulge your senses and win your heart.
REVIEWS
hi-fi+ Issue 243
Power Amplifier
Tune Three
May 05, 2025
"This is realistically
the best hybrid I've
had the pleasure of
listening to, and it is
likely to win many
admirers."
Review by Ed Shelley,
hi-fi+ magazine.
Preamplifier
Tune Two
May 07, 2024
“If High Fidelity has a
kind of an artistic side,
then Tune Two is,
indeed, a work of art
that you could enjoy
looking at, feeling of,
and listening to!”
which is why they're
worth every last euro
they're asking for."
Review by Dimitris
Stamatakos, AV-
Mentor Site.
hxos+ Issue 38
Power Amplifiers
Tune Five
March 15, 2023
“Tune Five have no
"me" and "look at me
playing now" at all,
they take the art of
high fidelity to the
most humble and
unfathomable heights
we've ever heard,
which is why they're
worth every last euro
they're asking for."
Review by Paris Kotsis,
hxos+ magazine.
YellowBox Issue 16
and
Power Amplifier
Tune Three
May 18, 2022
“hARt Lab's idea for a
power amp that
embraces the positive
values of the tube-
based circuits but the
driving capacity of a
MOSFET-based
output stage seems to
work as the company
intends, clearly better
than some other,
rather timid, hybrid
designs which seem
"ashamed" for using
tubes.”
Review by Dimitris
Stamatakos, Yellowbox
magazine and AV-
Mentor Site.
NEWS
CONTACTS