Telefon: Product Description
Denon PMA-2500NE
GENERAL SPECS
AUDIO QUALITY
PORTS
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Denon PMA-2500NE
13999 lei/ bucata/ STOC FURNIZOR -VERIFICA STOC
Sau 1749.875 lei / luna in 8 rate 
Garantie 24 luni
* Preţul conţine TVA şi taxa timbru verde
PMA-2500NE – Integrated Amplifier with DAC mode
Integrated Amp with USB-DAC for High-res Audio and “Simple & Straight” Engineering Design from High-end Models
2 x 160 W (4 ohm) output
Advanced Ultra High Current (UHC)-MOS Single Push-Pull Circuit Power Amplifier with new Schottky barrier diodes
DAC Master Clock Design
USB-B input for High Resolution Audio up to 384 kHz / 32 bit and 11.2 MHz DSD
Digital isolator to eliminate high-frequency computer noise on the USB-B
Low noise OLED display for source and sample rate indication
Analog Mode for pure audio reproduction switching off digital audio circuitry and display
Advanced AL32 Processing Plus
Direct Mechanical Ground Construction to minimize unwanted vibration
Chassis construction with 6 independent blocks to eliminate noises
Leakage-cancelling-mounted twin transformers
Main transformer with separate power supplies for analogue and digital circuits
Wide dynamic range playback, supporting high-resolution audio sources
High-grade volume control for precise adjustment
2 Digital Optical and 2 Digital Coaxial inputs
High performance MM & MC Phono Equalizer Amp
Available in Premium Silver
Denon is one of the rare audio brands that continue to actively develop Hi-Fi components and accumulate, refine, and pass down Hi-Fi audio technologies. The 2500NE series, designed for today’s age, has been developed by both veteran engineers and talented young engineers who have inherited the Denon technologies and expertise that have been cultivated over many years and decades. And the performance of the PMA-2500NE goes well beyond that of Denon’s previous PMA-2000 series. With its ultimate built-quality, unique Denon technologies and state-of-the-art connectivity, the PMA-2500NE truly is a masterpiece of sound technology. Thanks to the rear USB-B input and embedded high quality D/A converter, the PMA plays high resolution files up to 384kHz/32bit and DSD up to 11.2MHz from a computer in impeccable sonic quality. For the best performance from analogue inputs, the PMA features an Analog Mode which allows to switch off all unutilized sections like the digital input circuitry or the low noise display for an unaltered audio reproduction.
Advanced UHC-MOS Single Push-Pull Circuit
To achieve impeccable balance between delicate details and vigor in sound, the PMA-2500NE employs Ultra High Current MOS (UHC-MOS) FETs, capable of producing ample current in a single push-pull configuration which deliver superior linearity in the output stage throughout the sonic range from musical details to robust current. The technique of driving multiple amplifier devices in parallel to secure robust current has solved the problem of muddiness in sound caused by uneven performance among the devices. And to achieve musical expression filled with the delicate nuances of sound, Denon has continued to focus on amplification performed by one pair of devices. The PMA-2500NE is endowed with high-voltage, large-capacity UHC-MOS FETs (peak current of 210A). In addition, the Dual FET + cascade bootstrap connection maintains a constant voltage for the UHC-MOS while improving temperature stability, to reliably bring out the superior acoustic characteristics of UHC-MOS.
High-gain amp construction
The amplifier circuitry has been changed from the conventional two-stage configuration to a high-gain power amp in a single-stage configuration for a more direct signal path. A highly pure sound has been made possible by reducing the number of devices through which audio signals pass and shortening signal paths to an absolute minimum. The protection circuitry for the power amp output stage has also been considerably improved. The current limiter has been eliminated in favor of a system that monitors power transistor temperature changes in real time, and the current capacity of driver stage transistors has been boosted to 2.0A from 1.5A. As a result, the instantaneous current supply capability of the amp has been more than doubled (110A) compared to conventional designs and speaker drivability has been dramatically improved (damping factor: greater than 700, 20 Hz – 20 kHz).
Robust power supply circuitry
The PMA-2500NE is equipped with two transformers that have been mounted facing opposite directions in a leakage cancelling (LC) mount system to cancel mutual influences of magnetic flux, a source of noise, leaking from the transformers. Denon’s custom-designed, large-capacity electrolytic capacitors have been used for rectification, and low-loss, low-noise, high-speed Schottky barrier diodes have been used in the rectifier circuitry. This ensures a sufficient supply of clean current. To achieve a “simple & straight” circuit configuration, the connection unit between the diode unit and the block capacitor has been removed to drastically shorten the current supply line to the power amp. Extremely thick OFC wiring material has been used for the power line to reduce impedance.
MM/MC phono equalizer
The PMA-2500NE includes a phono equalizer that supports input from both MM and MC cartridges. This phono equalizer has high gain, and as loops in the circuit board pattern can cause adverse effects on sound quality, the “simple & straight” design represents a significant improvement. On the PMA-2500NE, the MM/MC toggle switch was changed from a push type to a relay type, which shortens the pattern on the circuit board and makes signal loops smaller, allowing delicate analogue signals to be amplified with greater purity.
Audio-grade analogue volume control
The PMA-2500NE employs an audio-grade motorized volume control that utilizes a multi-contact wire brush. Since the analogue volume control that Denon has continued to use does not require input buffer circuitry, the configuration of the circuit can be simpler than that of digital volume controls. The aluminum used for the knob is 2.5 times thicker than on conventional knobs, which gives it increased mass and greater ability to suppress mechanical vibration.
USB-DAC supporting 11.2-MHz DSD and 384-kHz/32-bit PCM
The PMA-2500NE provides USB-DAC functions that support high-resolution 11.2-MHz DSD and 384-kHz/32-bit PCM input signals. DSD transmission methods support ASIO native playback and DSD Audio over PCM Frames (DoP). Since asynchronous transfer is controlled by the PMA-2500NE’s master clock rather than the clock of a computer the transfer is free of jitter. The D/A converter used in the PMA-2500NE is the same 384-kHz/32-bit and DSD capable top class DAC Burr Brown PCM1795 used in the DCD-2500NE to deliver a clean, high-grade sound.
Advanced AL32 Processing Plus supporting 384-kHz/32-bit PCM input
For digital input, the PMA-2500NE employs Advanced AL32 Processing Plus, the latest version of Denon’s analogue waveform reproduction technology which utilizes unique data interpolation algorithms and also supports high-resolution 384-kHz/32-bit PCM signal input. These algorithms interpolate points that should exist before and after the points in large quantities of data to achieve a smooth waveform that is close to that of the original signal. By carefully restoring data that was lost during digital recording, the resulting playback sound is highly detailed, free of interference, accurately localized, richly expressive in the lower range, and beautifully faithful to the original sound.
DAC Master Clock Design
To accurately synchronize digital circuits, the PMA-2500NE’s DAC Master Clock Design treats the DAC as the master when clock signals are supplied. Positioning the master clock immediately adjacent to the D/A converter (DAC) suppresses jitter and ensures optimum precision in D/A conversion. In addition, the quality of the clock, which becomes the reference for semiconductor operation, is extremely important for ensuring that the digital audio circuitry performs at its maximum potential. The PMA-2500NE thus employs a clock oscillator to dramatically reduce phase noise that is the displacement of frequencies. The PMA-2500NE is further equipped with two clock oscillators, one for each sampling frequency (44.1 kHz and 48 kHz), that can be switched between the frequencies to thoroughly suppress jitter.
Analog mode
During analogue audio playback, Analog mode can be used to turn off power to the dedicated digital transformer and completely stop operation of the digital input circuitry to avoid any high frequency influence to the analogue section. Analog mode also turns off the fluorescent display, allowing the PMA-2500NE to operate as a purely analogue amp.
* During Analog mode, USB-B, coaxial digital, and optical digital inputs are disabled.
External pre-amp input terminals
The PMA-2500NE provides “EXT.PRE” input terminals – fixed gain inputs – that can be used for connecting an external pre-amp and using the PMA-2500NE as a power amp. This is convenient when connecting an A/V amp via its pre-outs so that the listening space with the same front speakers can be used as a home theater.
Gold-plated speaker terminals
The PMA-2500NE’s speaker terminals are gold plated to prevent corrosion over time and achieve reliable, long-term connections. Thick spades and banana plugs are also supported.
Aluminum top remote controller that can also operate the CD player
The PMA-2500NE comes with an aluminum top remote control unit that can also operate the DCD-2500NE and other Denon CD players.
Informații suplimentare
| Producator | Denon |
|---|---|
| Prod | Amplificator Stereo Integrat |
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