Accuphase E-600 User manual

E-600 is a succession model of E-560 and flag ship
integrated amplifier of Accuphase.
We name it E-600 instead of E-five hundred something
because the progress is more than ‘change of model’.
1

The big difference in appearance is LED bar graph
meters instead of needle meters.
2

Precise and well-designed volume sensor mechanism is
installed.
The volume mechanism is modified from C-2820’s.
It is consisted of CNC machining aluminum block, extra-
thick shaft and so on.
The volume knob provides very smooth touch and feel.
The drive sound by a remote commander becomes more
silent than before.
3

AAVA is re-designed to achieve low noise.
AAVA in E-600 achieves low noise by the paralleled
buffer amplifier and paralleled V-I converter in larger two
units.
Then the input stage of power amplifier is low-noised.
As a result, the overall noise of E-600 is 56%(-5dB) of E-
560.
4

The Damping-factor is an index of speaker driving ability.
By using Balanced Remote-sensing, MOS-FET switch
and Low impedance components, E-600 achieves
higher Damping-factor than E-560.
E-560 is 200 and E-600 is 500.
It is 2.5 times higher.
*Damping-factor = 8 ohm / Zo
Zo : Output impedance of amplifier
By CEA-490-A R-2008 standard
5

Remote-sensing is the technique to lower the output
impedance of amplifier by the negative feedback with
signal sensing from close up the speaker terminals.
Balanced Remote-sensing is the technique to make
impedance even lower by GND sensing and the negative
feedback of GND level with adding the signal sensing.
Not only Damping-factor is improved but also Total
Harmonic Distortion and Intermodulation Distortion get
better by Balanced Remote-sensing.
6

MOS-FET switch is mounted on the speaker protection.
Generally, a mechanical relay is used for the power-amp
output for speaker protection.
E-600 replaces a mechanical relay with MOS-FET switch.
As a result, the reliability, Damping-factor and sound
quality is improved.
Super-heavy-gauge edgewise coil is chosen because the
DC-resistance is extremely low.
Output coil is essential for stable power amplifier
movement.
*On-resistance of MOS-FET used for E-600: 2.6mOHM
7

E-600 accepts the new digital input board, DAC-40.
You can see the figure of music signal sampling
frequency input into DAC-40 on the front panel display.
Balanced-type input and output are additionally equipped
as Pre-Output and Power-Input.
The remote commander is elegant and high-quality.
8