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E-3000

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INTEGRATED STEREO AMPLIFIER

The E-3000 integrated amplifier emerged from the path forged by the technologies used in high-end equipment. Among this amplifier’s constituent elements, the vitally important volume control circuits incorporate AAVA that employs the ANCC principle. The power amplifier section produces balanced signals relying on the instrumentation amplifier principle while simultaneously creating a robust output stage through three-fold parallel push-pull power transistors driven in class AB. Every moment spent immersed in the vibrant playback of the E-3000 is one to relish.

Innovation – At the leading edge of technology

AAVA volume control circuit

Conventional preamplifiers use variable resistors to adjust volume, which can cause contacts to deteriorate and create rasping as well as increase noise at normal volume levels. AAVA, however, produces multiple, widely varying signals from the input signal and controls volume by changing the combination of those signals. This achieves minimum noise levels at all volume levels without any rasping.

ANCC significantly reduces distortion and noise

(Accuphase Noise and distortion Canceling Circuit)
The E-3000’s I-V conversion amplifier uses the ANCC principle. ANCC uses a secondary amplifier to cancel out noise and distortion from the main amplifier. The secondary amplifier utilizes a lownoise amplifier to increase the effect of the ANCC. Incorporating this ANCC in the AAVA I-V conversion amplifier drastically improves noise performance, particularly when transitioning from low volume settings to typical volume positions.

Power amplification stage configured as an instrumentation amplifier

The instrumentation amplifier circuitry’s equal impedance on the + and – sides and exceptional external noise suppression provide optimal performance for an audio amplifier.

Balanced remote sensing

Balanced remote sensing improves the damping factor by feeding back the GND at the same time as the signal output from the speaker terminals.

Sound quality – Simply aiming for the best

Robust power amplification stage

The power amplification stage on both the left and right sides features a large heat sink and employs three-fold parallel push-pull power transistors driven in Class AB to provide rated, high-power output of 100 watts into 8 ohms and 150 watts into 4 ohms.

High damping factor brings out the full potential of speakers

The damping factor represents the amplifier’s ability to drive the speakers. A damping factor of 600 (guaranteed) extracts the maximum potential from the loudspeakers.

Power supply circuitry designed for optimum stability

A strong power supply featuring a massive transformer and two high-voltage, large filtering capacitors (33,000 μF/71 V) offer a stable power supply at all times.

FEATURES:

• AAVA volume control circuit


• Powerful 100 watts into 8 ohms, 150 watts into 4 ohms


• Three-fold parallel push-pull configuration using power transistors driven in Class AB


• Power amplification stage configured as an instrumentation amplifier


• High damping factor of 600


• Balanced remote sensing to improve the damping factor


• Current feedback amplification circuit topology assures excellent phase characteristics in the high range


• Strong power supply with massive transformer and high-voltage, large filtering capacitors


• Protection circuitry using MOS-FET switches


• Tone controls using summing active filters


• High-carbon cast iron insulators for superior vibration damping


• Two expansion slots for option boards