Accuphase E-5000 Precision Integrated Stereo Amplifier

Accuphase E-5000 Precision Integrated Stereo Amplifier

Accuphase's flagship Class AB integrated amplifier and one of the four anniversary models marking the company's 50th year — 240 watts per channel, a damping factor of 1,000 equal to the flagship P-7300 stereo power amplifier, Balanced AAVA volume control, and equivalent input noise identical to the E-800S Class A flagship.

What It Is and Who It's For

The Accuphase E-5000 is the most powerful Class AB integrated amplifier Accuphase has built. It is not a product that fits neatly into any existing position in the lineup — it was created to mark Accuphase's 50th anniversary as the fourth of four anniversary models, and it incorporates the most advanced technologies from the company's separate power amplifier and preamplifier development into a single chassis. The result is an integrated amplifier whose power stage is architecturally identical to the P-7300 flagship stereo power amplifier, whose volume control is the Balanced AAVA system from the C-3800 reference preamplifier, and whose equivalent input noise matches the E-800S Class A flagship.

The buyer who belongs with the E-5000 has typically outgrown what the E-4000 offers — they need either the additional power (240 watts versus 180), the higher damping factor (1,000 versus 800), or the specific performance ceiling the E-5000 represents. It is also the integrated amplifier for the listener who wants an amplifier that can honestly be said to have no meaningful performance ceiling — one that will not be the limiting factor in any domestic system, regardless of how difficult the speakers or how large the room. It is 33.8 kg, it has a 502 mm depth, and it requires a serious rack and a dedicated circuit. It is not a casual purchase. It is the right answer for a serious system that is not going to be upgraded again.

240 Watts and a Damping Factor of 1,000 — What Makes This Possible in an Integrated

The E-5000's power amplifier section uses a five-fold parallel push-pull configuration of bipolar transistors per channel, operating in Class AB. The five-fold parallelism is one more device pair per channel than the E-4000's four-fold arrangement, and the increase is not merely about power output. Each additional parallel device pair lowers the effective output impedance of the output stage proportionally. Output impedance is the denominator in the damping factor equation — lower output impedance means higher damping factor. The E-5000 achieves a guaranteed damping factor of 1,000 at 8 ohms, equal to the P-7300 flagship Class AB stereo power amplifier and higher than every other integrated amplifier Accuphase has built.

This figure is reinforced by two additional mechanisms. Balanced remote sensing feeds back both the signal voltage and the ground reference from points immediately adjacent to the speaker terminals — sensing both lines rather than only the signal line eliminates the ground-return resistance from the feedback loop as well, achieving a lower effective output impedance at the actual speaker terminal than the output stage alone produces. MOS-FET switches with very low on-resistance handle speaker protection in place of conventional mechanical relays, whose contact resistance would add measurably to the output impedance the speaker sees. Photo-couplers isolate the protection detection circuit from the music signal, preventing the protection electronics from affecting the signal path during normal or fault conditions. Thick, short signal paths and large-format speaker terminals complete the low-impedance architecture.

Accuphase's technical documentation states the design explicitly: the circuit configuration of the E-5000's power amplifier engine is the same as the P-7300. This is the most direct statement of intent about the E-5000 available — the integrated amplifier's power section was built to the same standard as the separate power amplifier, not adapted from it.

Balanced AAVA — The Full Implementation

The E-5000 uses Balanced AAVA — not the standard AAVA of the E-3000 and E-4000, but the fully balanced differential implementation from the C-3800 preamplifier. The difference is structural: standard AAVA operates in single-ended topology, while Balanced AAVA runs two complete AAVA modules per channel — one for the positive phase of the signal, one for the negative phase — in a fully differential configuration throughout. Every signal path in the preamplifier section, from the Balanced AAVA module through the tone controls and the output buffer amplifier, is balanced. The power amplifier section receives those positive and negative signals simultaneously through its instrumentation amplifier input stage, maintaining the balanced architecture end to end.

The practical consequence is noise performance equal to the best Accuphase has achieved: –124 dB equivalent input noise (0.63 μV) — the same figure as the E-800S Class A flagship. A Class AB amplifier delivering 240 watts per channel achieving the same noise floor as a Class A amplifier at roughly one-third the output power is the direct result of the Balanced AAVA architecture, the monoblock internal layout, and the gold-plated PCB on which the Balanced AAVA circuits are assembled. The S/N ratio at the line input is a guaranteed 111 dB; at the Main In it is 126 dB.

The Volume Sensor — Inherited from the C-3800

The volume sensor in the E-5000 is a mechanical assembly developed for the C-3800 reference preamplifier project and carried forward here. In Balanced AAVA, the volume knob does not carry the signal — it is a position sensor that instructs the AAVA switching array which current sources to activate. The engineering of this mechanism was treated with the same seriousness as the circuit design.

The sensor body is machined from an aluminum block using an extrusion process, giving it the rigidity and mass of a precision instrument rather than a control part. The motor drive assembly for remote control operation is mounted using a floating mechanism — isolated from the chassis by custom-formulated silicone rubber dampers — so that motor vibration during remote volume adjustment does not couple into the chassis or the AAVA circuits. Custom-made grease is used in the gear train. The result is volume adjustment that is silent under remote operation and feels, under the hand, like a reference preamplifier. It is the volume knob of the C-3800 in the body of an integrated amplifier.

Monoblock Construction and the Power Supply

The E-5000 uses monoblock internal construction: the left and right channel power amplifier modules are physically separated within the chassis, each with its own dedicated heatsink and output transistors. The Balanced AAVA module is positioned at the front of the unit, away from the power circuits. The central power supply — a massive custom toroidal transformer with two 40,000 μF/100V filtering capacitors — sits between the two power amplifier modules, equidistant from both channels. The 100V capacitor rating (versus the 80V capacitors in the E-4000) reflects the higher rail voltages needed to support 240 watts per channel, and represents a meaningful increase in the energy storage available for dynamic headroom.

The chassis is 211 mm tall and 502 mm deep — 30 mm taller and 74 mm deeper than the E-4000, and comparable in depth to the E-800S Class A flagship which shares the same depth. The weight of 33.8 kg is a consequence of the larger transformer, the higher-rated capacitors, and the additional output transistor pairs. This is not bulk for its own sake — it is the physical signature of a power supply and output stage designed without shortcuts.

Inputs, Outputs, Tone Controls, and Option Boards

The E-5000 provides five unbalanced RCA line inputs, two balanced XLR inputs, a tape recorder loop, and two sets of speaker output terminals accommodating simultaneous or switched operation (Set 1: 4–16 Ω; Set 2: 8–16 Ω). Preamplifier outputs in both balanced XLR and unbalanced RCA allow external power amplifiers to be driven from the E-5000's preamp section for bi-amplification. Power amplifier inputs in both formats allow the E-5000's output stage to be driven from an external preamplifier, bypassing the Balanced AAVA section. Phase inversion is selectable per input and stored in memory. A mono switch, loudness compensator (+6 dB at 100 Hz), and –20 dB instant attenuator are standard.

The tone controls use the same summing active filter topology as in the E-4000 — bass centered at 300 Hz with ±10 dB range, treble centered at 3 kHz with ±10 dB range — and are defeated when set to flat. The balance control operates through the Balanced AAVA switching array rather than through a conventional balance potentiometer, maintaining the signal path integrity of the volume control for left/right adjustments as well.

Two option board expansion slots accept the DAC-60 digital input board, the AD-50 phono board, and the LINE-10 line input board. The DAC-60's sampling frequency is displayed on the E-5000's front panel function display when installed. The headphone output uses a dedicated discrete circuit with high output current capability for driving a wide range of headphone impedances.

How the E-5000 Compares: E-4000, E-800S, and the Wider Landscape

Stepping down to the E-4000: the E-4000 is an exceptional amplifier at its level. The E-5000 exceeds it in output power (240W versus 180W), damping factor (guaranteed 1,000 versus guaranteed 800), volume control architecture (Balanced AAVA versus AAVA), equivalent input noise (–124 dB versus the E-4000's figure, which is measurably higher), and power supply specification (40,000 μF at 100V versus 40,000 μF at 80V). The E-5000 also uses five-fold parallel bipolar output transistors versus the E-4000's four-fold arrangement. For systems with large, demanding speakers in substantial rooms — and for buyers who want the absolute ceiling of Class AB integrated amplifier performance — the E-5000 is the correct choice. The E-4000 is fully capable for the majority of serious domestic systems and the performance gap, while real, is incremental in moderate rooms with moderate speaker loads.

Above the E-5000 in Accuphase's lineup is the E-800S Class A integrated amplifier. Class A operation keeps the output devices biased on continuously, eliminating crossover distortion at the cost of substantial heat generation and lower efficiency — the E-800S is rated at 50 watts per channel into 8 ohms, versus the E-5000's 240 watts. The E-800S is the choice for a system where the sonic character of Class A operation — its specific treatment of harmonic structure and transient detail — is the primary criterion, and where the speaker load and room are suited to 50 watts. The E-5000 is the choice when power, control, and the performance ceiling of Class AB are the criteria. The two amplifiers reach the same noise floor by different architectural routes; their power delivery and thermal behavior are fundamentally different.

Against competitors at this power and price level — the Luxman L-509Z, the Gryphon Diablo 300, the Boulder 866 — the E-5000 is distinguished by its Balanced AAVA volume control (no competitor offers a structural equivalent), its guaranteed rather than typical damping factor of 1,000, its monoblock internal construction, and Accuphase's assembly standard. It is one of a small number of integrated amplifiers at any price where the power stage is architecturally derived from a separate reference power amplifier rather than being an integrated-specific design.

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Key Specifications

• Rated Output (both channels driven): 240 W/ch (8 Ω), 320 W/ch (4 Ω)
• Total Harmonic Distortion: 0.05% (20 Hz–20 kHz, 4–16 Ω load)
• Intermodulation Distortion: 0.01%
• Frequency Response (at rated output, Line In): 20 Hz–20 kHz (+0/–0.5 dB)
• Frequency Response (at rated output, Main In): 20 Hz–20 kHz (+0/–0.2 dB)
• Frequency Response (at 1W output): 3 Hz–150 kHz (+0/–3.0 dB)
• Damping Factor: 1,000 (guaranteed, 8 Ω load, 50 Hz)
• Equivalent Input Noise: –124 dB (0.63 μV) — equal to E-800S Class A flagship
• Signal-to-Noise Ratio (line input, A-weighted): 111 dB (guaranteed)
• Signal-to-Noise Ratio (Main In, A-weighted): 126 dB
• Input Sensitivity (rated output, Balanced/Line): 220 mV
• Input Sensitivity (rated output, Main In): 1.74 V
• Input Impedance (Balanced): 40 kΩ
• Input Impedance (Line/Main In): 20 kΩ
• Maximum Input Voltage: 5.0 V
• Pre Output Voltage (at rated output): 1.74 V
• Pre Output Impedance: 50 Ω
• Gain (Line In → Pre Out): 18 dB
• Gain (Main In → Speaker Out): 28 dB
• Volume Control: Balanced AAVA (two AAVA modules per channel, fully balanced differential)
• Output Stage: Five-fold parallel push-pull bipolar transistors, Class AB
• Power Supply: Single massive toroidal transformer; 40,000 μF/100V × 2 filtering capacitors
• Tone Controls: Bass 300 Hz ±10 dB; Treble 3 kHz ±10 dB (summing active filter, defeatable)
• Loudness Compensator: +6 dB at 100 Hz
• Attenuator: –20 dB (instant)
• Balanced Inputs: 2 × XLR
• Line Inputs: 5 × RCA
• Pre Out: Balanced XLR and RCA
• Main In: Balanced XLR and RCA
• Speaker Outputs: 2 sets — Set 1: 4–16 Ω; Set 2: 8–16 Ω
• Headphone Output: Yes (discrete circuit, 8 Ω or higher)
• Option Slots: 2 (compatible with DAC-60, AD-50, LINE-10 and legacy boards)
• Power Consumption: 98 W (idle); 570 W (IEC 60065); 0.3 W (standby)
• Dimensions (W × H × D): 465 × 211 × 502 mm (18.3″ × 8.3″ × 19.8″)
• Weight: 33.8 kg (74.5 lbs)
• Country of Origin: Japan
• Warranty: Contact All Elite Audio for current warranty terms

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Why Buy From All Elite Audio

All Elite Audio is an authorized Accuphase dealer. Every E-5000 we sell is sourced through legitimate North American distribution with full manufacturer warranty coverage. Accuphase does not honor warranty claims on gray-market imports — at the investment level of the E-5000, that protection is material. Our staff has spent time with the full Accuphase integrated amplifier range and can speak to how the E-5000 compares to the E-4000 and E-800S in real listening, which option boards suit your sources, and how the amplifier performs with specific speaker pairings in our inventory. We welcome the time it takes to get a decision of this magnitude right.

Call 443-402-5055 / Text 443-402-5064 / Visit 1921 York Rd, Timonium, MD 21093

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Frequently Asked Questions

What makes the E-5000 different from the E-4000, and is the step up justified?

The E-4000 is an outstanding amplifier at its level. The E-5000 improves on it in every key specification that matters for demanding system pairings. Output power increases from 180 to 240 watts per channel into 8 ohms, and from 260 to 320 watts into 4 ohms. The damping factor rises from a guaranteed 800 to a guaranteed 1,000 — achieved through five-fold parallel bipolar output transistors (versus four-fold in the E-4000), balanced remote sensing with ground-line feedback, and lower on-resistance MOS-FET protection switches. The volume control advances from the standard AAVA of the E-4000 to the Balanced AAVA found in Accuphase's reference preamplifiers — two AAVA modules per channel in a fully differential configuration — which achieves an equivalent input noise of –124 dB, matching the E-800S Class A flagship. The power supply uses 40,000 μF capacitors rated at 100V versus the E-4000's 80V rating, reflecting the higher rail voltages needed for 240-watt operation. For systems with large floorstanding speakers in rooms of 400 square feet or more, for very demanding speaker loads, or for listeners who want the absolute performance ceiling of the Class AB integrated amplifier format, the E-5000 is clearly the correct choice. For a modest-sized room with efficient speakers, the E-4000 is fully capable and the difference, while real, is not worth the step up in investment.

What does "equivalent input noise equal to the E-800S" mean, and why does it matter?

The E-800S is Accuphase's flagship Class A integrated amplifier — generally considered the quieter of the two in an A-versus-AB comparison because Class A operation eliminates the crossover events that introduce a specific type of noise. The E-5000, despite operating in Class AB at 240 watts per channel, achieves the same guaranteed equivalent input noise of –124 dB (0.63 μV) as the E-800S. This means the background noise floor you hear between notes, during quiet passages, and at idle is indistinguishable between the two amplifiers — not because Accuphase cheated the specification, but because the Balanced AAVA architecture, monoblock internal layout, gold-plated PCB, and careful circuit design have pushed Class AB noise performance to a level previously associated only with Class A. In listening, this produces the blackness between notes that lets low-level musical details — the decay of a piano note, the breath before a vocal phrase, the texture of a bowed string — emerge from silence rather than from a noise floor.

How does the E-5000 achieve a damping factor of 1,000 when most integrated amplifiers are far lower?

Damping factor is the ratio of speaker nominal impedance to amplifier output impedance, and improving it requires reducing the amplifier's output impedance at every point in the circuit from the output transistors to the speaker terminals. The E-5000 addresses this comprehensively. Five-fold parallel bipolar output transistors lower the output impedance of the output stage to one-fifth of what a single transistor pair would present — parallelism directly reduces output impedance. Balanced remote sensing then feeds back both the signal line and the ground reference from points immediately adjacent to the speaker terminals, eliminating the resistance of both the output stage wiring and the ground return path from the feedback loop. MOS-FET protection switches with very low on-resistance — lower than the mechanical relay contacts they replace — add no meaningful impedance between the output stage and the speaker terminals. Large-format speaker terminals, short signal paths, and thick conductors complete the picture. The result is a guaranteed damping factor of 1,000 — equal to the P-7300 flagship stereo power amplifier, and higher than any other Accuphase integrated amplifier has achieved.

Is the E-5000's power amplifier really the same as the P-7300 stereo power amplifier?

Accuphase's technical documentation states this directly: the circuit configuration of the E-5000's power amplifier engine is the same as the flagship Class AB stereo power amplifier P-7300. This does not mean the E-5000 is a P-7300 in a different box — the P-7300 delivers 300 watts per channel and uses ten-fold parallel output transistors, while the E-5000 uses five-fold and delivers 240 watts. What it means is that the circuit topology, the design principles, the instrumentation amplifier architecture, and the balanced remote sensing implementation in the E-5000's power section were developed from and share the same engineering foundation as the P-7300. For a buyer choosing between the E-5000 and a separate preamplifier and power amplifier, this is meaningful: the power stage in the integrated amplifier is not a simplified version of what Accuphase builds into a dedicated chassis. It is the same engineering at a different power level.

What is Balanced AAVA and how does it differ from the standard AAVA in the E-4000?

Standard AAVA, as used in the E-3000 and E-4000, is a single-ended volume control that eliminates variable resistors from the signal path by switching precision current sources. It is a significant improvement over potentiometers and stepped attenuators. Balanced AAVA uses two complete AAVA modules per channel — one for the positive phase, one for the negative phase — operating in a fully differential balanced configuration. The entire preamplifier section of the E-5000, from the Balanced AAVA module through the tone controls and output buffer, is balanced. The power amplifier section receives both positive and negative signal phases simultaneously via its instrumentation amplifier input. This balanced architecture cancels common-mode noise by differential subtraction throughout the signal path, which is the direct mechanism behind the E-5000's –124 dB equivalent input noise. It is the same Balanced AAVA implementation found in the C-3800 and C-2900 reference preamplifiers, placed inside an integrated amplifier chassis for the first time in the E-5000.

Does the E-5000 include a phono stage, and what options are available?

No phono stage is included as standard. The E-5000 accepts the optional AD-50 plug-in phono board, which provides both moving-magnet (40 dB gain, 47 kΩ) and moving-coil (66 dB gain, selectable loading of 30/100/300 Ω) capability with a subsonic filter, all controllable from the front panel. The AD-50 installs into one of the two option slots on the rear panel and draws power from the E-5000's internal supply. The newer AD-60 phono board is also compatible and adds the 60 Ω MC loading position and additional refinements. For a vinyl listener who wants a fully self-contained system, the AD-50 or AD-60 makes the E-5000 complete. For a listener with a serious external phono stage — the Accuphase C-57, for example — the E-5000's line inputs are fully suitable for connection.

What digital inputs can be added and how do they integrate with the E-5000?

The DAC-60 digital input board installs into one of the option slots and adds USB Type B (PCM up to 384 kHz/32-bit and DSD up to 11.2 MHz), optical TosLink (up to 96 kHz PCM), and coaxial digital inputs. The DAC-60 uses dual ESS ES9016K2M chips in parallel. When the DAC-60 is installed, the E-5000's front panel function display shows the sampling frequency of the incoming digital signal — a practical confirmation of what resolution your source is actually delivering. DAC input selection is handled from the front panel via a dedicated button. If you prefer to use an external DAC or streamer with its own high-quality analog output, the E-5000's five line-level inputs and two balanced inputs accommodate any such combination without the DAC-60.

Can the E-5000 be used as a preamplifier or power amplifier only?

Yes to both. The Pre Out jacks — provided in both balanced XLR and unbalanced RCA format — allow the E-5000's preamplifier section to drive an external power amplifier directly, using the Balanced AAVA volume control for level management. This is useful for bi-amplification setups where a second power amplifier drives the woofers while the E-5000's own output stage drives the tweeters and midrange, with the Pre Out feeding the second amplifier. The Main In jacks — also in both balanced and unbalanced format — allow an external preamplifier to drive the E-5000's output stage directly, bypassing the Balanced AAVA section. A separator switch on the front panel opens the connection between the internal preamp and power amp stages when these external connections are in use. This flexibility allows the E-5000 to function as a fixed component in a growing or evolving system without becoming obsolete.

How loud and hot does the E-5000 run in normal use?

The E-5000 is not a Class A amplifier and does not run at the thermal levels associated with the E-800S or A-series amplifiers. Idle power consumption is 98 watts, which generates modest heat that is managed by the large heatsinks on the left and right power amplifier modules. Under dynamic musical signals at moderate listening levels, heat generation is substantially lower than at sustained rated output. Adequate ventilation on the sides and top is important, and Accuphase's standard guidance of at least 20 cm clearance above the unit applies. The fan-less natural convection cooling is completely silent — there are no moving cooling parts. In terms of acoustic noise from the chassis itself, the E-5000 operates silently; the toroidal transformer is specified for low flux leakage and minimal mechanical hum.

Where can I buy the Accuphase E-5000?

The Accuphase E-5000 is available at All Elite Audio, an authorized Accuphase dealer at 1921 York Rd, Timonium, MD 21093. We carry the full Accuphase integrated amplifier range and can arrange a listening session that places the E-5000 in context alongside the E-4000 and E-800S with speaker pairings relevant to your system. Buying from an authorized dealer is the only way to ensure full manufacturer warranty coverage — Accuphase does not honor warranty claims on units sourced outside the official North American distribution channel. Call us at 443-402-5055, text us at 443-402-5064, or visit the showroom. A purchase at this level deserves a proper conversation, and we are glad to have it.