JVC RX-D702, RX-D402, RX-D401 manual Problems of Digital Amplifiers, Analog-PWM

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Hybrid Feedback Digital Amplifier

JVC technologies for satisfying theProblemsTHX Ultra2ofcertificationDigital Amplifiers

Problems of Digital Amplifiers

RX-D702 RX-D402

*Also applies to RX-D401

With conventional amplifiers, the mechanism for digital signal processing tends to cause a wide range of noise.

Analog

Digital

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal

 

 

 

 

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

 

LC typee

 

 

 

 

 

 

 

 

 

 

 

Processor

 

PWM

 

 

 

Stage

 

 

 

 

 

 

 

 

 

LPF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCM-PWM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Analog-PWM

 

Slew Rate Fluctuation

Magnetic

Power Supply Noise

Distortion

 

Dead Time

 

EMI

 

Error & Distortion

CausedCausedatatPowerPowerStageStageandandAfterAfter

*Even when the PWM signals are accurate, a wide range of noise is generated at power stage and after.

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Contents Page High-Power 7.1-Channel A/V Control Receiverseivers Design Concepts Hdmi Hdmi Audio + 9 Video Cables Ch AudioComponent Video Hdmi CablesPb Pr 480i/p HD, 480pComposite S-Video Component 480i 480pWhatWhatisisDCDiDCDibybyFAROUDJA?FAROUDJA? 3D Deinterlacer3D Deinterlacer EffectEffectExamplesExamples11Jagged Edges on Diagonal Lines Cross-Color SuppressionFleshtone Adaptive Noise Reduction EffectEffectExamplesExamples22Wireless USB Connection Desk-Top PC USB ConnectionUser ID Learning Function Auto Scan TransmitterChannel Key ID Key Bluetooth ComparisonComparisonofofSignalSignalFormatsFormatsWifi/802.11b FormatAll-digital transmission --No D/A or A/D conversion CC Converter BackgroundBackground For CDs, DVDs, etcProblemsProblemswithwithDigitalDigitalConversionConversion D/A Conversion in Amplitude Domain D/A Conversion in Frequency Domain CCCCConverterConverter BitBitExpansionExpansionSectionSection RangeRangeExpansionExpansionSectionSection FrequencyFrequencyConversionConversionSectionSectionCC Converter Expansion on Expansion OFF Converter Noise Shaping Response/Noise Spectrum Noise Shaping Response TheoreticalNoise Spectrum DVD Audio AnalogAnalog IninDIR JVC exclusive DSP JVC exclusive DSP AdvantagesJVC’sJVC’sDSPDSP SoundSoundFieldFieldAnalysisAnalysisRayRayTracingTracing RearImpulse Response Theater Live Club DAPDAPModesModes11DAP Modes for RX-D702/D402/D401 DAPDAPModesModes22BandBandGraphicGraphicEqualizationEqualization Outout 3D3DHeadphoneHeadphoneMidnightMidnightModeMode InputoutputCenterCenter--ChannelChannelAlignmentAlignment SmartSmartSurroundSurroundSetupSetup Hybrid Feedback Digital Amplifier Switching Power Supply with Highly-Efficient Operations Background -- What is PWM?Generation of PWM Signals Heat GenerationAnalog-PWM Problems of Digital AmplifiersModulator Evolution of Hybrid Feedback Digital AmplifierHybrid Feedback Digital Amplifier Ver JCV8015 Low-Voltage Power Supply + Power SupplyPower Supply One-Chip Solution with JCV8015 High Slew Rate JCV8015 Benefits 1 -- Operational AmpJCV8015 Benefits 2 -- PWM Modulator/External Clock High-Precision Triangular WavesUltra-High-Speed Comparator JCV8015 Benefits 3 -- ±2.5V Regulator Analog SignalsVCC Analog Analog GNDQuality Parts Superior Sound Reproduction IRS20124Comparison of Speaker Driveability RX-D702 Non-Feedback AmpD. Comparison of Digital Amplifiers 004%Supplementary Information OSD Superimposed on Screen RX-D702BControl Receiver Basic Features Product HighlightsRX-D402BControl Receiver Basic FeaturesFor RX-D702B For RX-D402B/RX-D401S RX-D702B RX-D402B/RX-D401S

RX-D401, RX-D402, RX-D702 specifications

The JVC RX-D702, RX-D402, and RX-D401 are remarkable receivers that exemplify JVC's commitment to delivering high-quality audio and advanced technology for home entertainment. Each model presents distinct features while maintaining a strong foundation of performance, making them suitable for various listening needs.

The JVC RX-D702 serves as a flagship model, offering exceptional audio quality and a plethora of connection options. It supports Dolby Atmos and DTS:X, providing an immersive sound experience that enhances movies, music, and games. The receiver supports 4K HDR video pass-through, ensuring high-resolution visuals. Featuring Wi-Fi connectivity, the RX-D702 allows instant streaming from various music services and seamless integration with smart home devices. The intuitive on-screen interface and remote app make navigation simple, providing users with easy access to settings and configurations.

In standby mode, the RX-D702 features low power consumption, a key consideration for eco-minded consumers. The model also showcases a robust power rating, ensuring it delivers dynamic sound with strength and clarity across different audio formats. Equipped with multiple HDMI inputs, audio and video signal routing becomes effortless, making it a perfect solution for multi-device setups.

The JVC RX-D402 is designed for users who desire powerful audio features without the extensive capabilities of the RX-D702. While it doesn’t support the latest surround sound formats like Dolby Atmos, it provides excellent stereo sound with a solid power output. The RX-D402 includes essential streaming services and Bluetooth connectivity, allowing users to enjoy music wirelessly from devices. Its compact size makes it ideal for smaller rooms where space may be a limitation.

Lastly, the RX-D401 remains a user-friendly receiver, appealing to budget-conscious consumers who still want quality performance. It offers essential audio performance and basic connectivity options, including Bluetooth and USB inputs. The RX-D401 is perfect for casual listeners who enjoy music without the complexity of advanced surround sound formats.

In summary, the JVC RX-D702, RX-D402, and RX-D401 offer a variety of features and technologies, catering to all kinds of audio preferences. From the high-end capabilities of the RX-D702 to the straightforward functionality of the RX-D401, JVC's receivers ensure impressive sound quality tailored to different environments and user needs.