Changes from the E-560
This time, the differences in appearance are more significant. Not everyone will be happy about the lack of VU-meters, but you can tell that care has been taken to emphasize the change and to draw our attention to the A-65 power amplifier, which together with the A-200 was the basis for the development of the E-600. The following is a list of changes quoted by the manufacturer.
- LED bar graph meters in place of VU-meters
- volume level control:
- high-rigidity precision volume sensor
- extruded from a solid aluminum block, it was originally developed for the C-2820
- the volume knob provides a smoother operation feel than ever before
- AAVA volume control
- the AAVA circuit has been redesigned for further improvement of the S/N ratio
- the low-noise AAVA used in the E-600 is built with parallel buffering and I/U conversion circuits
- low-noise power amplifier input
- E-600’s S/N ratio has been improved by 56% (-5dB) against the E-560
- increased damping factor
- the use of power MOS-FETs in triple parallel configuration together with MCS+ topology and the current feedback principle
- damping factor is 2.5 times higher against the E-560
The power amplifier block is configured with the latest instrumentation amplifier topology, which enables fully balanced signal transmission. Together with MCS+ and the current feedback topology, this makes for even better electrical characteristics. By keeping the impedance of the output circuitry extremely low, constant-voltage speaker drive can be realized, so that the signal remains practically unaffected by speaker impedance. In addition to improved damping factor, intermodulation distortion has been further decreased.
- MOS-FET switches used in protection circuit to prevent contact problems and ensure long-term reliability. Eliminating mechanical contacts from the signal path further enhances sound quality. The protection circuit features ultra-heavy-gauge edgewise coils for minimal impedance. The coil quality is key for amplifier’s operation stability
- E-600 accepts a new DAC-40 board featuring digital inputs; the input sampling frequency is displayed on the front panel
- new balanced power amplifier inputs and preamplifier outputs
- new remote control unit