TOPPING Pre900

The Pre900 features a four-channel reference-grade amplification circuit. It is not only fully balanced, but also implements a true end-to-end differential design from input to output. Left and right channels are physically isolated to the highest degree, effectively suppressing noise and electromagnetic interference, delivering exceptionally pure, pristine sound. Digital and analog circuits are powered completely independently, minimizing crosstalk at the source. Even at high dynamic output, the noise floor remains imperceptible, the background pitch-black, and every musical detail vividly alive. The Pre900 uses a relay array combined with a high-precision resistor network to achieve 1,000-step volume adjustment, with each step switching smoothly and naturally. Crosstalk is kept below −150 dB, ensuring that the left and right channels remain perfectly synchronized at any volume. Throughout the entire adjustment process, only the volume changes—the tonal quality remains completely consistent.