The New E-5000 is the flagship high-power Class AB
integrated amp developed as the 4th model of Accuphase’s
50-years anniversary.
The E-5000 offers the all technologies we acquired
through power amp and pre-amp development andachieves high power output of 240W into 8 ohms withsophisticated sound quality.
Our superior Balanced AAVA principle is featured in thevolume control circuit, the E-5000 presents every piece ofmusic in exquisite details. In the power amp section, theinstrumentation amplifier configuration with fully balanced
inputs achieves the ideal power amplification while
suppressing the noise influences.
The fully balanced circuits through the pre-amp to poweramp section are realized, the E-5000 breaks into a brandnew field with the cutting-edge technologies and vibrantsound quality.
1The E-5000 is the largest Class AB integrated amp in
Accuphase lineup, compared to the E-800 which is theflagship Class A integrated, The E-5000 has same depth
size but 28 mm shorter height.

E‐480

Width

E‐5000Height

E‐800

Depth

WeightE‐480465 mm 181 mm 428 mm 24.6 kg

E‐5000465 mm 211 mm 502 mm 33.8 kg

E‐800465 mm 239 mm 502 mm 36.0 kg
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The E-5000 follows the traditional front panel design ofintegrated amp.
A newly developed large needle power meter is able tomove even at the small volume level less than -60dB.
The multi-function display in the center of panel shows
the volume level and the sampling frequency when theDAC option board is installed.
Two expansion slots for option boards are prepared.

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E-5000 has the mono-block construction. The strong
power supply with massive, specially-made and highefficiency toroidal transformer and 40000μF filteringcapacitors are installed in the center of the unit.
In addition, the two power amplifier modules are kept
separate for the left and right channels.
Balanced AAVA module is set at the front of the unit to
avoid the noise interference. The accurate operation is
performed with the custom-made high-accuracy volumesensor.

4The music signal does not pass the volume mechanism
in balanced AAVA principle, it is just a position sensor todetect the volume level.
However, the feeling of the volume knob is very
important for audio enthusiasts.
Therefore the volume sensor mechanism of splendid
operation feeling was newly developed in C-3800’sproject.
In the E-5000, the motor and the set of gears aremounted with the floating mechanism, and with thecustom-made grease, the knob provides a smooth
operation feel and super-quiet volume adjustment.
The volume sensor mechanism float from the chassis toblock off the vibration with specially made silicon rubbers.

5The E-5000 has the highest output power in Accuphase
integrated amps, the rated continuous average output is240W/8Ω.
The E-5000 perfectly drives any loudspeakers even lowefficiency ones.

6The AAVA(Accuphase Analog Vari-gain Amplifier) is aradically different volume control principle that eliminates
all variable resistors from the signal path.
The E-5000 employs two AAVA modules per channel
with a fully balanced configuration.
What’s more, in the pre-amp section, up to the tone
control circuit and the output buffer amp are balanced.
The power amplifier section can receive those positive
and negative signals at the same time by the
instrumentation amplifier topology.
It works as the totally balanced circuit which is tolerant tothe internal and external harmful noise.

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The E-5000 realizes -124dB（0.63μV） of equivalent
input noise equal to the flagship class-A integrated amp
E-800.

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The Balanced AAVA circuit is ideally arranged on thegold-plated PCB, not just realizing the ultra low noisecharacteristics, but also contributing to the long term
reliability and maintaining the fine sound quality.
Dedicated, high-quality headphone amplifier constructedwith discrete components features the high output
current and stability to drive various headphones.

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The E-5000 achieves 1000 of guaranteed DampingFactor, equal to the flagship Class AB stereo power ampP-7300.
*Damping-Factor, DF:
An index of speaker driving ability. Higher DampingFactor amplifier has higher speaker driving ability.
DF = 8 ohm / Output-impedance

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The output impedance is made lower by 5 parallel pushpull final stage arrangement of bi-polar transistors.
Circuit configuration of the power amplifier engine is assame as the flagship Class AB stereo power amplifier P7300.

11Remote Sensing is the technique to lower the output
impedance of amplifier by the negative feedback withsignal sensing from nearby the speaker terminals.
Balanced Remote Sensing is the technique to make theoutput impedance even lower by both the signal sensing
and the GND sensing, that is the negative feedback of
GND level.
Not only Damping Factor, but also Total Harmonic
Distortion and Intermodulation Distortion are all improvedby the Balanced Remote Sensing.

12Mechanical relays are the common components forspeaker protection but the contact resistance of
mechanical relay is higher than people think.
Therefore, Accuphase has chosen the MOS-FET switch
instead of conventional mechanical relays for speakerprotection.
Thanks to this MOS-FET switch, the damping factor,
reliability and sound quality are all improved.
E-5000 features the new MOS-FET device for this switch
which has very low on-resistance.
E-5000 employs carefully-selected very low-impedancecomponents such as the large speaker terminals and soon. Making signal paths thick and short also helps
attaining the low impedance.

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The newly designed output protection circuit can detect
any short-circuiting of the speaker terminals with due
consideration for the product safety.
Temperature-sensors which detects the heatsink
temperature are installed on the heatsink. Thanks to this,the unit accurately ascertains the high temperature alarmin power amplifier section.
Thanks to the photo-coupler, the detected short-circuiting
information is completely isolated from the music signal
to minimize the negative effects on the sound quality.
**When these protection circuits are activated, the unit
completely interrupts speaker output and makes thepower meters flash to indicate the abnormal condition.

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