O-NOORUS D1 Class D Amplifier TPA3255 PFFB

The O-Noorus D1 amplifier is based on a PFFB (Post Filter FeedBack) architecture and a TPA3255 amplifier chip coupled to two NE5532 OPAs, enabling it to deliver up to 2x 250W @ 4ohm (1% THD+N, with a 50V power supply). In terms of connectivity, the D1 has the essentials, with an analog RCA input and a speaker output, plus a subwoofer output for a 2.1-channel system, and a 3.5mm jack pre-out. The cutoff frequency of the subwoofer output is 80Hz for deep, immersive bass.
This O-Noorus amplifier operates in two distinct modes: BP (ByPass) and T&B (Treble & Bass). ByPass mode, as its name suggests, does not allow volume control, so the amplifier will operate at full power, while T&B mode allows volume control and treble and bass adjustment over a range of -/+10db thanks to an NJW1194 volume control chip. An infrared remote control completes the package for an optimal user experience.