4.1x

About the 4.1x

The Audio Note (UK) DAC 4.1x series, particularly the Balanced Signature version, prioritizes musical performance over technical specs, featuring pure Class A operation, zero negative feedback, single-ended topology, and valve rectification. It employs the Analog Devices AD1865 18-bit DAC chip, selected for superior sound despite not being the highest spec, with no oversampling, jitter reduction, or digital filtering—all performed in the analogue domain for better phase and dynamic coherence. The Balanced Signature upgrades the M6 Line pre-amplifier output stage with a pair of 5687 double triode valves coupled to a custom output transformer (Audio Note copper wire on High B C-core, 33:1 step-down) for exceptional frequency response and dynamics. Supports balanced and single-ended outputs via premium RCA and XLR connectors. Uses high-quality components like Audio Note tantalum resistors, copper foil capacitors, and triple C-core output transformers. Reviewed highly for natural, musical presentation with excellent dynamics, tonality, and soundstaging.