Denon AVR-4800 Literature/Product Sheet - Page 5

AVR-4800 s Discrete Power Amplifier Section with Equal Power and Equal Response In All Channels, Features THX Ultra Certification The AVR-4800's all discrete power amp stage features high current, low distortion power output devices, able to drive virtually any modern loudspeaker system configuration, regardless of impedance or efficiency. Lucasfilm's most stringent THX Ultra certification provides your assurance that the AVR-4800 can deliver the full authority and dynamic impact of modern motion picture soundtracks in standard and large size home theater environments. The AVR-4800 is equipped with Denon's smart cooling system featuring a volume and temperature sensing fan, which provides necessary cooling during extended periods of high power operation, yet is completely inaudible and unobtrusive during quiet passages. s Robust Power Supply The THX Ultra-certified power amp section is supplied with abundant reserves of energy due to MAIN TRANSFORMER POWER BLOCK PRE-AMP BLOCK VIDEO BLOCK the power supply's high DIGITAL BLOCK current power transformer, SUB TRANSFORMER CONTROL BLOCK and large capacity high current storage capacitors. Independent Power Transformers Block Diagram Individual separate power supplies are also provided for the low level analog and digital circuit blocks, to eliminate mutual interference. THX Ultra certification assures highest quality sound at virtually any volume level, from whisper quiet to thundering crescendo. s New D.D.S.C. (Dynamic Discrete Surround Circuit) - Digital Denon's unique approach to surround decoder design, DDSC-Digital, employs optimized circuit blocks and elements for each individual surround decoder function, including highest performance analog-to-digital conversion stage featuring 20 bit precision, dedicated DSP processors featuring all-digital domain decoding. For the most accurate analog reproduction, the AVR-4800 features a stereo analog bypass mode, which preserves stereo analog purity and transparency, while providing digital bass management accuracy for optimum subwoofer response. s Dual Analog Devices SHARC 32 Bit Floating Point DSP The heart of the AVR-4800's surround decoder section features two high speed 32 bit floating point DSP processors, same as used in the AVR-5700, bringing separates-quality surround decoding performance to the receiver category. The first DSP performs the Dolby Digital and DTS surround decoding, while the second DSP provides the THX post-processing, Surround EX decoding, other DSP environment simulations and bass management functions, all in digital domain with the highest accuracy possible. s 24 Bit, 96 kHz D/A Converters For All Channels Unlike conventional A/V components that use integrated low-bit codecs, the AVR-4800 features highest quality multiple D/A converter chips. Featuring Analog Devices real 24 bit, 96 kHz D/A conversion on all audio channels, the AVR-4800 provides separates-quality D/A conversion performance. s THX Ultra & THX Surround EX, For Accurate Movie Soundtrack Reproduction The AVR-4800 is the world's first A/V receiver to feature Lucasfilm's THX Ultra 5.1 post-processing along with the latest Lucasfilm THX Surround EX decoding function, providing the most accurate reproduction of the newest multi-channel motion picture soundtracks. THX Surround EX, developed jointly by Lucasfilm and Dolby, made its debut in movie theaters with the release of the movie "Star Wars - Episode 1: The Phantom Menace". Featuring a specially-encoded 5.1 discrete soundtrack, the THX Surround EX function includes a center back surround channel in addition to the left surround and right surround channels, providing heightened spatial realism and more convincing surround imaging. Now that Surround EX-encoded movies are available for home theater playback, the AVR-4800's THX Surround EX function provides thrilling home theater surround sound reproduction. Compared to simpler and less accurate "6.1" unlicensed simulations, the AVR-4800's accurate THX Surround EX decoding function provides the full suite of required decoding parameters, and can be automatically or manually selected, according to the program material characteristics. In addition, the AVR-4800 surround decoder is DTS ES-compatible, along with accurate decoding of Dolby Digital and DTS 5.1 channel soundtracks, with or without THX 5.1 post-processing. Dynamic Discrete Surround Circuit-Digital Block Diagram Digital Input Digital Interface Receiver A/D Converter Analog Input 20-bit DSP 1 Dolby Digital Pro-Logic Decoder DTS Decoder 32-bit floating point DSP 2 THX Processor Surround Simulator 32-bit floating point I2S Interface DF 1 96 kHz/ 24-bit 96kHz / 24-bit DAC DAC DF 2 96 kHz/ 24-bit DF 3 96 kHz/ 24-bit 96kHz / 24-bit DAC DAC 96kHz / 24-bit DAC DAC Master Volume Control DF 4 96 kHz/ 24-bit 96kHz / 24-bit DAC DAC L Front R Center Subwoofer L Surround R L Surround Back R THX Surround EX Processor Block Diagram DSP 1 DSP 2 Dolby Digital Pro-Logic Decoder DTS Decoder Crossover Filter ReEqualization Matrix Circuit Timber Matching Re-EQ Dynamic Decorrelation Filter 32-bit floating point 32-bit floating point FL C FR LFE SL SR SB (SBL/SBR) *1. The AVR-4800 is equipped with a 5-channel amplifier. To hear the 6th and 7th channels used by Surround Back, you need to connect an external amplifier such as the DENON POA-5200. The signals for the additional channels are output through the Pre Out jacks. *2. When the Surround Back channel is turned off, the AVR-4800 processes the signals in the same manner and gives you the same effects as conventional 5.1-channel signals.