sur la photo du bas les Power DNA ont été rajoutés pour donner un peu moins de dureté,c'est une des nombreuses modifications apportées par les ingénieurs de la marque....et il y en a plein d'autres,mes machines sont pratiquement toutes modifiées.....syber a écrit :Ou comment illustrer par un contre exemple, ce que l'on a déjà expliqué sur ce forum à propos des amplis HC de 7x140 Watts : il faut comprendre en fait 140 Watts sur les 7 canaux ... mais a tour de rôle !
I. Performance Features
• 400 Watts per channel of clean, continuous power: The single most important feature of a multi-
channel home theater amplifier is abundant, clean power.
Our research has revealed the remarkable fact that most home theater amplifiers are driven into clipping
most of the time! This is because modern movie soundtracks, such as Dolby Digital sound tracks,
typically allow a full 25 dB (a factor of 300 in power!) dynamic range between dialog and loud
dynamic passages. Most amps run out of power long before such peak levels are achieved.
This causes clipping-a condition where the peaks of the musical waveforms are cut off due to the
amplifier's limited power output capability. Severe clipping causes acute distortion, which can be
dangerous to a tweeter as well as an affront to the ears.
However, even mild, occasional clipping causes listener fatigue, and robs the music or soundtrack of
its dynamics. The PowerMaster 2000 is virtually immune to clipping due to its prodigious power
output capability. It is capable of delivering 400 watts rms per channel of continuous power into 8
ohms, with all five channels driven. This is nearly three horsepower of continuous sound!
Into 4-ohm loads, PowerMaster's power output capability effortlessly climbs to 700 watts per
channel! And a staggering 1000 watts per channel into low impedance loads!
This is possible, in part, due to 70 pounds of high-efficiency aluminum convective (read silent!)
heatsinking, plus an enormous, high-speed three horsepower power supply.
This prodigious power output capability, combined with large dynamic headroom, virtually ensures
that PowerMaster will never clip-even during the loudest musical peaks. This fact is partly
responsible for PowerMaster's effortless authority, sense of ease, and shear musicality under all
circumstances and with all source material.
• AccuLinear™ design: PowerMaster 2000 utilizes EAD's AccuLinear analog design philosophy.
Acculinear ensures that PowerMaster's input circuitry is never driven beyond it's linear operating
range-even with full amplitude signals at the highest (20 kHz) audible frequencies.
For this reason, PowerMaster will never distort, nor approach slew-rate limiting, under any
circumstance! While most amplifiers specify a "power bandwidth" that is considerably less than 20
kHz, PowerMaster will deliver its enormous, full-rated output power across the entire audio
spectrum, This guarantees linear performance-and negligible distortion- under all circumstances,
contributing further to PowerMaster's unique sense of effortless authority, musicality, and grace.
• Dynamic energy steering: To achieve acceptable performance specifications for channel separation
(i.e., low inter-channel cross talk), some manufactures have been forced to provide separate power
supplies for each channel. This, unfortunately, imposes a strict limit on the power available to any
given channel, defeating the classic advantages of a common, large power supply.
In a five-channel amplifier, separate supplies add considerable expense, which generally means that
none of the individual supplies are beefy enough to provide adequate power output or dynamic
headroom to avoid clipping and distortion on loud passages.
IX. Specifications
Output Power
8 ohm load (continuous power, all channels driven) 400 Watts rms
4 ohm load 700 Watts rms
2.5 ohm load > 1000 Watts rms
Frequency Response 10 Hz to 100 kHz ±
0.1 dB
Full power Bandwidth > 30 kHz
Peak Output Current (per channel) 45 Amps
Damping Factor 100
Signal to Noise Ratio 110 dB
THD+Noise < 0.03 %
IMD < 0.01%
Crossover Distortion below measurability
(Audio Precision)
Inter-Channel Crosstalk < 100 dB
CMRR @ 50/60 Hz (balanced) > 90 dB
Gain
"Low" 20 dB gain
"Med" 26 dB gain
"High" 32 dB gain
Input Sensitivity
20 dB gain 5.6 Volts rms
26 dB gain 2.8 Volts rms
32 dB gain 1.4 Volts rms
Input Impedance
Single Ended 20 kΩ
Balanced 20 kΩ + 20 kΩ
Input Connectors RCA, XLR
AC Line Voltage 100/120/220/240
VAC (50/60 Hz)
Power Consumption
Full power 2300 Watts
Idle 120 Watts
Standby 5 Watts
Physical Dimensions 8" x 17" x 23" Ne
