The RC-1590 is crafted with an emphasis on sound quality, featuring a high-performance power supply with two custom-built toroidal transformers for efficiency and low magnetic fields. These transformers help in providing low-noise isolation between analog and digital circuits, which is crucial for maintaining audio purity. The preamp includes custom-made slit-foil capacitors, known for their quick charge/discharge times and low signal loss, enhancing bass performance.

Inputs and Outputs:

The amplifier is well-equipped with a range of connectivity options. It includes balanced XLR and unbalanced RCA inputs and outputs, digital inputs and outputs (three coaxial and three optical), a TI precision volume control, dual mono subwoofer outputs, and a high-quality aptX Bluetooth for wireless audio streaming. There’s also a front panel USB port for iPod/iPhone/iPad, and a rear panel PC-USB input supporting DSD (for Windows) and DoP (DSD over PCM for Mac OS X) up to 24-bit/192kHz.

Digital to Analog Conversion (DAC):

The RC-1590 features a premium 32-bit/768kHz AKM Digital to Analog Converter, which supports high-resolution audio playback. This DAC is capable of handling a variety of digital formats, ensuring that the audio signal is converted with precision and clarity.

• Remote Control: A robust remote control allows for easy adjustments of volume, source selection, and other settings.
• Automation Integration: It supports integration with home automation systems via RS-232, IP control, and 12-volt trigger outputs.
• Display and Usability: The unit has a dimmable display and an automatic power-off function that can be configured for energy saving.

Sound Quality: Reviews highlight the RC-1590’s ability to deliver uncolored, natural sound with a wide and open soundstage. The preamplifier’s design focuses on not adding or subtracting from the original audio signal, which is why it’s praised for its fidelity. Its analog circuitry bypasses DSP for a pure analog experience, though it does incorporate digital inputs for modern audio sources.