HeartField R1 is a portable headphone amplifier with an R2R digital-to-analog converter.

R2R technology is the perfect choice for those who seek accurate sound reproduction and true analog signal conversion. Unlike the widely used Delta-Sigma (Δ-Σ) and 1-bit converter technologies, which create analog signals by modulating digital data, R2R DACs convert digital signals into true analog signals using a network of resistors. This avoids the errors typical of other technologies and accurately reproduces even constant-current (DC) signals.

Special R2R architecture
Our device is equipped with 32 ultra-precise resistors per channel, 64 resistors in total, which creates a fully discrete R-2R DAC. Each resistor has a tolerance of 0.1%, which ensures uncompromising accuracy and unrivaled sound quality.

Sound tuning
At HeartField, we believe that the most important part of any HiFi product is its tuning. Advanced technology alone will not create magic sound; only painstaking tuning can make it lively and expressive. HeartField – discover a world where every note is full of life.

Wide range of applications

Android smartphones and tablets: Connect and enjoy improved sound.
iPhone and iPad: Perfect compatibility for high-quality sound.
Apple Mac and Windows PC: Easy connection for work and play.
Portable Players with USB Audio Output: Enjoy a new level of musical experience.

Lightweight design weighing only 19.8g
The device does not put additional strain on the cables and USB ports of your devices such as smartphones. Thanks to the virtually weightless design, it is easy to carry around, providing high-quality sound wherever you are.