S48.4D Pure-Power DSP Amplifier – Smart & Savage
✅ 4CH High-Level + 4 RCA Inputs：Direct integration with any car audio system.
✅ CLASS D Dual Power Mode：50W×4@4Ω / 70W×4@2Ω, extreme efficiency with 90dB SNR.
✅ CIRRUS 32-bit DSP Core：24Bit/192KHz Hi-Res processing, studio-reference clarity.
✅ 31-Band EQ + AI Auto-Tuning：15ms automatic sound calibration for instant perfection.
✅ Expandable Bluetooth 5.0：Add wireless freedom via external module (sold separately).
✅APP Ecosystem：iOS/Android/PC control with 10 pro-level presets.
✅ 0.42A Standby & Dual Protections：Built for -40℃~80℃ extreme environments.
Engineered For：Pure aftermarket upgrades, SPL competitors, and off-road warriors.
| Specification | S48.4D |
| Input | 4 Ch High Level/4 RCA/BT(External) |
| Input Voltage(Max) | High Level4-10Vrms, RCA 0.3-2Vrms |
| Output | 4 High Level/8 RCA |
| Output Voltage (Max) | Amplifier output -14Vrms, RCA -1Vrms |
| Output Gain | Power Amplifier : 26dB |
| Optical In | Yes |
| Coaxial In | NA |
| Amplifier type | Class D |
| Power Output | 4x50W RMS @ 4 Ω , 4x70W@ 2 Ω |
| (AD & DA) Signal Conversion | CIRRUS LOGIC 32Bit DSP CS47048C-DQZR |
| Sampling Rate | AD/DA Converter 24-bit/192kHz |
| EQ/Delay | 31Band EQ/ 15ms |
| Frequency Range | 20Hz- 20Khz |
| Q Value(Slope) | 0.5-9 |
| EQ Gain | -18.0dB +12.0dB |
| Filtering | Butter , Bessel, Link |
| Filtering Crossover point | 20Hz- 20Khz |
| Filter slope | 6dB/oct -48dB/Oct |
| Phase | 0-180 |
| Time Alignment (delay) | 15ms |
| Preset | 10 |
| Frequency Response | 20-20kHz |
| Signal to Noise - RCA | 90dB |
| Signal to Noise - Power Amp | 90dB |
| Input Resistance | 20kΩ |
| Low level output Resistance | 680Ω |
| Static Current | 0.42A |
| Operating Voltage | 9-16V |
| Working Current Range | 0.5-17A |
| Temperature resistance | Yes |
| Bluetooth | not build in |
| Bluetooth Version | 5.0 |
| USB Audio Built in | NA |
| USB DISK | NA |
| Remote | 无 |
| PC Connection | yes |
| PC Software | yes |
| Android App | yes |
| IOS app | Yes |
| Auto Tuning | Yes |
| REM Input | 3.5V |
| REM Output | 0.1A |
| Over heat protection | Yes |
| Over Load Protection | Yes |
| Working Indicators | Yes |
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