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O-NOORUS D4 Amplifier
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O-Noorus D4 IIClass D 2.1 Amplifier TPA3255 PFFB Bluetooth 5.3 2x220W 4 Ohm
The O-Noorus D4 II is a powerful integrated amplifier based on high-quality components. It features an ES9023P DAC chip, a TPA3255 amplifier chip and OPA1642 op-amps in DIP8 format. The D4 II supports PCM up to 24bit 192kHz via its various digital inputs and delivers up to 2x220W into 4 ohms, allowing it to drive large spaces. In addition, Bluetooth 5.3 provides convenient and reliable wireless reception. Connectivity covers the essentials, with the addition of an HDMI ARC input and a subwoofer output for an immersive 2.1-channel system. Versatile, the O-Noorus D4 II will satisfy both Hi-Fi enthusiasts and 2.1 home theater users.
O-Noorus D4 II : A powerful amplifier
The amplification stage of the O-Noorus D4 II is based on a PFFB (Post-Filter FeedBack) circuit, a TPA3255 chip and OPA1642 op-amps. It is capable of delivering up to 2x220W into 4 ohms (THD+N 1%). The O-Noorus D4 II can easily drive demanding speakers and fill large spaces. Furthermore, the OPA1642 op-amps are in DIP8 format and easily replaceable.
O-Noorus D4 II : ES9023P DAC
The DAC chip allows the O-Noorus D4 II to decode PCM up to 24bit 192kHz via HDMI ARC, optical Toslink and coaxial inputs, while the USB input supports CD quality 16bit 48kHz. The O-Noorus therefore allows you to enjoy high-resolution sources for quality listening.
O-Noorus D4 II : Bluetooth 5.3
The O-Noorus D4 II can receive an audio signal wirelessly thanks to Bluetooth 5.3 with support for SBC and AAC codecs.
O-Noorus D4 II : Immersive TV experience
The HDMI ARC port allows you to use a television or a video game console as a source. In addition, the subwoofer output enables an immersive sound experience.
O-Noorus D4 II : 3-band EQ
The 3-band equalizer provides precise adjustment for tailoring the sound rendering according to the user’s preferences or the music being played.
Overview of the O-Noorus D4 II
| 1 | Power ON/OFF + Bypass / Tone mode selection |
| 2 | Source/volume indicator |
| 3 | Bass control |
| 4 | Midrange control |
| 5 | Treble control |
| 6 | Volume / Source selection |
| 7 | RCA input |
| 8 | Bluetooth antenna |
| 9 | Subwoofer output |
| 10 | SPDIF coaxial input |
| 11 | Balanced 4.4mm jack input |
| 12 | HDMI ARC input |
| 13 | USB-C input |
| 14 | Optical Toslink input |
| 15 | Speaker terminals |
| 16 | Power input via DC jack |
Technical specifications
| Specifications | |
|---|---|
| Product type | Integrated amplifier |
| Amplifier type | Class D |
| Amplification component | TPA3255 |
| Op-amps | OPA1642 |
| DAC chip | ES9023P |
| Inputs | 1x USB-C 1x HDMI ARC 1x Coaxial 1x Optical Toslink 1x RCA stereo 1x Balanced 4.4mm jack input Bluetooth 5.3 |
| Outputs | Speaker terminals Subwoofer output |
| Supported sample rates | USB: PCM up to 16bit 48kHz Other digital inputs: PCM up to 24bit 192kHz |
| Output power | 2x 220W @ 4 ohm (THD 1%, 48V 10A) 2x 160W @ 8 ohm (THD 1%, 48V 10A) 2x 120W @ 4 ohm (THD 1%, 48V 5A) 2x 95W @ 8 ohm (THD 1%, 48V 5A) |
| Load impedance | 2-8Ω |
| Frequency response | 20Hz-20kHz |
| RCA/XLR inputs | |
|---|---|
| THD+N @ 1kHz | <0.003% @4 ohm 5W <0.002% @8 ohm 5W |
| SNR @MAXOUT 1kHz | 105dB |
| Gain | 32dB |
| Noise | 130uVrms |
| SINAD @ 5W | 92dB |
| Digital inputs | |
|---|---|
| THD+N @ 1kHz | <0.04% @4 ohm 5W <0.04% @8 ohm 5W |
| SNR @MAXOUT 1kHz | 95dB |
| Gain | 32dB |
| Noise | 860uVrms |
| SINAD @ 5W | 78dB |
| General | |
|---|---|
| Power supply | 24V-48V (36V 5A power supply included) |
| Dimensions | 180 x 158 x 40mm |
| Weight | 710g |
| Package | 1x O-Noorus D4 II 1x Bluetooth antenna 1x USB-C to USB-A cable 1x USB-A to USB-C adapter 1x 36V 5A power supply |
| Input | Bluetooth |
| Input | RCA |
| Input | Optical |
| Input | HDMI ARC |
| Input | USB |
| Input | SPDIF |
| Output | Speaker terminal |
| Output | Subwoofer |
| Color | Black |
| Channel | 2.1 |
| Class | Class D / T |
| Amplifier chip | TPA3255 |
| Power (W) | 260.0 |
| Remote Control | Yes |
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