Moon 870A Power Amplifier
Цена: 46939 лв. с ДДС
Производител: Moon


The MOON 870A Power Amplifier is a balanced differential dual-mono design that effortlessly outputs 300 watts into 8Ω and 600 watts into 4Ω. Transparency and soundstage are exceptional, despite this amplifier's high power rating. Ultimately, the 870A will mate seamlessly with any loudspeaker allowing it to reach its full sonic potential, regardless of its load.

Several in-house developed advancements allow the MOON 870A, the most powerful 2-channel Evolution Series amplifier to date, to perform with both accuracy and grain-free character. These include (i) MOON output transistors, specifically designed for use in our amplifiers, providing tighter and more visceral bass performance, as well as unprecedented linearity thoughout the entire frequency spectrum; and (ii) our advanced "zero global feedback" circuit, commonly referred to as Lynx.

870A Technical Features

· Lynx circuitry which is a "no overall feedback" design resulting in genuine real-time amplification, a more
  accurate musical reproduction with respect to tonality, virtually non-existent IMD and the elimination of
  common phase errors resulting from feedback
· Custom proprietary toroidal transformer design with lower magnetic, electrical and thermal loss,
  yielding an improved power transfer and lower regulation factor. The result is increased current speed
  and better dynamics
· A dual-mono oversized power supply
· Precision matched and fully decoupled proprietary MOON Bipolar output transistors with unprecedented
  gain linearity resulting in improved bass response and even more accurate sonic reproduction
· A high damping factor for superior musical dynamics, improved signal speed and refined timbre accuracy
· A very short capacitor-free signal path for a faster transient response
· Stable to any known speaker impedance
· "Class A" output to 5 watts for greater efficiency
· RS-232 port for (i) full unsolicited bidirectional feedback and (ii) firmware updates
· 12 Volt trigger input/output for remote operation
· 4-Layer printed circuit boards with pure copper tracings for a much shorter signal path;
  This results in greater sonic accuracy and a dramatically improved signal-to-noise ratio
· Designed to be powered up at all times for optimal performance
· Low operating temperature for a longer than normal life expectancy
· Ultra rigid chassis construction to minimize the effects of external vibrations
· Accurate matching of the very finest quality electronic components in a symmetrical circuit design.
870A Detailed Specifications  
Type Solid State
Configuration Dual-Mono / Balanced
Power Supply Transformers 2 x 1.3kVA
Power Supply Capacitance 240,000µF
Class Of Operation A/AB
Balanced Inputs XLR - 1 pair
Single-ended Inputs RCA - 1 pair
Input Device Type J-FETs
Input Impedance 47.5KΩ
Input Sensitivity 1,400mV RMS
Output Device Type Bipolars - 16 per channel
Output Binding Posts WBT - 2 pairs per channel
Output Power @ 8Ω 300 Watts
Output Power @ 4Ω 600 Watts
Output Power @ 2Ω 1200 Watts
Output Power - Bridged Mono 1200 Watts
Frequency Response 10Hz - 200kHz   (+0/-3dB)
Output Impedance < 0.01Ω
Damping Factor   (static) > 800
Gain 31dB
Signal-to-noise Ratio 106dB @ full power
Maximum Output Voltage 58 Volts
Slew Rate 42 V/µs
Maximum Current - Peak 72 amperes
Maximum Current - Continuous 30 amperes
Crosstalk @ 1kHz -105dB
IMD Unmeasureable
THD   (20Hz - 20kHz @ 1 watt) 0.015 %
THD   (20Hz - 20kHz @ 300 watts) 0.04 %
12 Volt Trigger Input/Output Operation Direct Logic (0V = off, 12V=on) using a 3.5mm
mono jack with an Input/Output impedance of
1000Ω and current requirement of 12mA
RS-232 Port 9-pin female DB connector
Power Consumption @ idle 75 watts
AC Power Requirements 120V / 60Hz   220-240V / 50Hz
Fuse Replacement   120V   /   220-240V 10.0A long fast blow   /   5.0 long fast blow
Shipping weight 98 lbs / 44 kgs
Dimensions   (w x h x d) 18.75 x 7.5 x 17.5 in.   (47.6 x 19.1 x 44.5 cm.)



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