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O-NOORUS D4 Amplifier
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O-Noorus D4 Class D 2.1 Amplifier TPA3255 PFFB Bluetooth 5.3 2x260 ohm @ 4 Ohm
The O-Noorus D4 is a powerful integrated amplifier, based on high-quality components. It incorporates an ES9023P DAC chip, a TPA3255 amplifier chip and DIP8-mounted OPA1642 OPAs. As a result, the D4 supports PCM up to 24bit 192kHz via its various digital inputs, and delivers up to 2x260W into 4 ohms, enabling it to soundtrack a sizeable space. What's more, Bluetooth 5.3 offers convenient, reliable wireless reception. Connectivity includes the essentials, plus an HDMI ARC input and subwoofer output for an immersive 2.1-channel system. The versatile O-Noorus D4 will satisfy both Hi-Fi and 2.1 home theater enthusiasts.
O-Noorus D4: A powerful amplifier
The O-Noorus D4's amplification system is based on a PFFB (Post-Filter FeedBack) circuit, a TPA3255 chip and OPA1642 OPAs. It can deliver up to 2x260W into 4 ohm (THD+N 1%). The O-Noorus D4 can easily power power-hungry loudspeakers and sound systems in large spaces. Moreover, the AOP1642 are DIP8-mounted and easily replaceable.
O-Noorus D4: ES9023P DAC
The DAC chip enables the O-Noorus D4 to support up to PCM 24bit 192kHz via HDMI ARC, Toslink optical and coaxial, while its USB input supports up to CD quality 16bits 48kHz. The O-Noorus offers the possibility of enjoying high-resolution sources for quality listening.
O-Noorus D4: Bluetooth 5.3
The O-Noorus D4 can receive a signal via wireless transmission thanks to Bluetooth 5.3 and support for SBC and AAC codecs.
O-Noorus D4: Immersive TV experience
The HDMI ARC port lets you use a TV or video game console as a source. Furthermore, a subwoofer output promises an immersive experience.
O-Noorus D4 overview
| 1 | Power ON/OFF + Bypass / Tone mode |
| 2 | Input indicator |
| 3 | Bass control |
| 4 | Midrange control |
| 5 | Treble control |
| 6 | Volume / Input selection |
| 7 | Speaker terminals (L+R) |
| 8 | Bluetooth antenna |
| 9 | HDMI ARC input |
| 10 | USB-C input |
| 11 | Coaxial input |
| 12 | Subwoofer output |
| 13 | Stereo RCA input |
| 14 | Toslink optical input |
| 15 | DC 24-48V power supply |
Technical characteristics
| Specifications | |
|---|---|
| Product type | Integrated amplifier |
| Amplifier type | Class D |
| Amplification component | TPA3255 |
| OPA | OPA1642 |
| DAC chip | ES9023P |
| Inputs | 1x USB-C 1x HDMI ARC 1x Coaxial 1x Optical Toslink 1x Stereo RCA Bluetooth |
| Outputs | Speaker terminals Subwoofer output |
| Supported sampling rates | USB: PCM up to 16bit 48kHz Other digital inputs: PCM up to 24bit 192kHz |
| Output power | 2x 260W @ 4 ohm (THD 1%) 2x 300W @ 4 ohm (THD 10%) |
| THD | ≤ 0.01% |
| SNR | ≥ 108dB |
| SINAD | 87dB |
| Termination impedance | 2-8Ω |
| Frequency response | 20Hz-20kHz |
| General | |
|---|---|
| Power supply | 24V-48V (36V 5A power supply included) |
| Dimensions | 138 x 170 x 40mm |
| Weight | 655g |
| Package | 1x O-Noorus D4 1x Bluetooth antenna 1x USB-C to USB-A cable 1x USB-A to USB-C adapter 1x 36V 5A power supply |
| Input | Optical |
| Input | HDMI ARC |
| Input | USB |
| Input | SPDIF |
| Input | Bluetooth |
| Input | RCA |
| Output | Subwoofer |
| Output | Speaker terminal |
| Color | Black |
| Channel | 2.1 |
| Class | Class D / T |
| Amplifier chip | TPA3255 |
| Power (W) | 260.0 |
| Remote Control | No |
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