The Denon AU-1000 is a step-up transformer designed to enhance the output of low-output moving coil (MC) cartridges. Released in the early 1980s, it was created to complement the Denon DL-1000A cartridge. Weighing approximately 25 lbs, the device is robustly constructed, featuring twin perm-alloy transformers and direct input/output connections to minimize signal interference. Its design includes a double-shielded sealed transformer case, providing effective electromagnetic shielding. The AU-1000 supports cartridge load matching from 10 to 40 ohms and offers a step-up ratio of 1:11.5 or 21dB, accommodating various setups. The output load is matched to 50k ohms, ensuring compatibility with typical audio equipment. It boasts a frequency response of 10 to 80 kHz flat and 5 to 200 kHz within +/- 3dB. Its dimensions measure approximately 7 inches in width, 9.5 inches in depth, and 4.5 inches in height, making it a compact yet powerful addition to a vinyl playback system. The AU-1000 is recognized for its exceptional sound quality, characterized by a dark background and wide bandwidth, enhancing dynamics and detail in audio playback.
