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Clarion?s DRZ9255 Source Unit Takes You into the Recording StudioThe top of the class DRZ9255 includes all the features that people demand in today?s source units, including high-performance functions, high-quality parts and superb design and materials for the faithful reproduction of sound. Components include a Digital-to-Analog converter that oversamples at a speed of 96 kHz, a four-way crossover, a five-band parametric equalizer and a four-layer glass epoxy circuit board. These components let you hear the smallest sonic nuances and let you tailor the sound to your personal taste. The external power supply with its DC-to-DC converter delivers stable power, and every detail of the chassis is designed with performance in mind. Car audiophiles looking for the ultimate sound can find it with these high-performance features and components.
Dual 24-bit / 96 kHz Sampling Digital-to-Analog Burr-Brown Converters and DSP
Built-In 4-Way Crossovers
5-Band Parametric Equalizer
Digital Time Alignment for Each Line Level Output
8-Channel/4-Volt Gold Plated Oxygen-Free Copper RCA Outputs
0.5dB-Step Electronic Volume Adjustment Circuit
Copper Plated Chassis
External DC/DC Converter
CeNET Control of Optional CD Changer, TV Tuner and iPod Interface
Two 2-Channel AUX Inputs
Zinc Die-Cast Faceplate
Fiber Optic Input/Output
Vacuum Florescent Display
18FM/6AM Presets
Remote Control Included
Conventional CD Players Can Only Reproduce Frequencies Up to Around 20 kHzThe spiral pattern on CDs represents numbers (“digit” means “number”). These numbers represent measurements of an audio signal (and other data). When a digital recording is made, measurements can be made 44,100 times each second (per channel). At that sampling rate, frequencies up to around 20 kHz can be recorded… so the frequency range of conventional CD players barely extends over 20 kHz.
High-Frequency Harmonics Add Richness and Depth to SoundWhy can?t conventional CDs encode data for frequencies over the limit of around 20 kHz? Because the people who set the CD standard believed that no one could hear those high frequencies. If such frequencies were on a conventional CD, the filters in a conventional CD player would remove those frequencies. Furthermore, analog filters can cause phase distortion of the signals that go through them, causing the high frequencies that do come out of the player to come out at the wrong times. Ironically, high-frequency harmonics can affect the details and the depth of sound.
96 kHz Oversampling Enables Reproduction That Is More Faithful to the Original SourceThe 96 kHz digital anti-imaging filter interpolates samples into the audio signal from the disc at a speed more than twice as fast as the CD standard sampling rate of 44.1 kHz. This is the first such digital filter designed for vehicle audio. Without oversampling, the signal from a CD must be filtered in the analog domain to reduce high-frequency noise, and such analog filters cause phase (time) distortion. Oversampling filters are free from phase distortion, so they deliver more musical detail and more of the realistic resonances of real live sound.
Copper Plated Chassis Reduces Distortion and NoiseThe use of a copper plated chassis minimizes the creation of spurious electrical currents that could distort the audio signal. Additionally, the copper plating can reduce noise because it creates an insulating shield. Zinc has a high specific gravity, high rigidity, and low resonance, so a die-cast zinc panel can reduce distortion caused by vibration. Because components such as the power supply, VFD devices for the display, and the drive mechanism can cause noise in the signal, those components are externally positioned away from the audio signal.
Burr-Brown Advanced Segment 24-Bit Digital-to-Analog ConverterAfter the data from the disc goes through the 96-kHz filter, it is processed by a Burr-Brown advanced segment 24-bit DAC with superior dynamics and resistance to clock jitter. The Digital-to-Analog conversion is highly accurate because the DAC?s internal structure is a four DAC configuration operating on an L?R differential signal.
Turning the Display OFF to Turn Sound Quality ONWhen the DRZ9255 plays a CD or other source, its display can be turned off to minimize interference from circuits that can otherwise degrade sound quality.
The DRZ9255?s DC / DC Converter Keeps Great Sound In and Keeps Noise OutThe DRZ9255 is truly an audiophile source unit. Its external DC / DC converter is comprised of components of the highest quality from its input wiring through its chassis to its output fuses. This power supply gives the DRZ9255 both strength and precision, and its six-sided shielded casing repels noise even during high-load bursts. To prevent even the smallest vibration, the power supply is wrapped in a die-cast aluminum casing and a copper plated chassis. Toroidal choke coils inside the power supply minimize induced vehicle noise and ...
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