You’ll find no shortage of connectivity here. There’s an impressive array of digital inputs taking in USB, AES/EBU, optical, and coax in both RCA and BNC forms. There are nine inputs in total, though number eight is reserved for the built-in streaming module and input nine is for aptX Bluetooth
So, how does Moon provide next-level performance?
Look inside the 680D and we like what we see with the care taken over the circuit layout and power supply arrangement. The 680D uses Moon’s MHP (Moon Hybrid Power) power supply module, as used in the company’s even pricier, reference products.
The MHP module mixes both traditional linear and switch mode technologies to deliver a stable, low-noise, and power-efficient energy feed to the signal circuitry. The digital and analog sections are powered by separate outputs from the supply to avoid unwanted interactions and optimize performance.
Each of the nine digital inputs routs into an FPGA (Field Programmable Gate Array) that re-clocks the signal. The Moon’s is compatible with all files up to 32-bit/384kHz PCM and DSD256 files and should, therefore, cover pretty much everyone’s music file collection.
At the heart of the 680D is the ESS Sabre’s ES9028PRO DAC chipset which packs no fewer than eight DAC chips, configured so that four combine to create the signal for each channel. The output of each chip is carefully calibrated so that none of them is set to work at the same level which reduces distortion that may be common at any specific output level.
Great care has been taken with the digital clocking system, too. It is carefully positioned to minimize jitter effects and has a dedicated precision voltage regulator to ensure a stable power feed. Once the digital music stream is converted to analog, it passes through a fully balanced output stage that, as expected, is packed with high-grade components.
What you get is a smooth and refined performer. It’s a friendly and accommodating balance – one that isn’t easily provoked by bright or aggressive recordings.