Accuphase
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Specs
| Rated Output Power (8 ohms) | 150 watts per channel |
| Rated Output Power (4 ohms) | 300 watts per channel |
| Rated Output Power (2 ohms) | 450 watts per channel |
| Total Harmonic Distortion | 0.03% (4 to 16 ohms), 0.05% (2 ohms) |
| Frequency Response | 20 Hz to 20 kHz +0 / -0.2 dB (rated output) |
| Damping Factor | 800 |
| Signal to Noise Ratio | 125 dB (at rated output) |
| Gain | 28 dB |
| Input Impedance | 40 kilohms (balanced), 20 kilohms (line/unbalanced) |
| Dimensions (W x H x D) | 465 x 190 x 427 mm (18.31 x 7.48 x 16.81 in) |
| Weight | 30.0 kg |
| Power Consumption | 94 W (idle), 485 W (per IEC 60065) |
| Input Sensitivity | 1.38 V (at rated output, Normal) |
Warranty
Sold as an authorized Accuphase dealer by All Elite Audio. New Accuphase P-4600 units include the full Accuphase USA manufacturer warranty of 3 years parts and labor for the original owner. Contact us with any service or setup questions.
What's in the Box
- Accuphase P-4600 stereo power amplifier
- AC power cord
- Owner's manual
- Warranty documentation
Overview
The Accuphase P-4600 is a Class AB stereo power amplifier that continues the long tradition of Japanese engineering excellence for which the brand is known. Built around an instrumentation amplifier principle and a robust, high current output stage, it is designed to deliver stable power into low impedance loads while preserving the clarity, tonal purity, and refinement that define the Accuphase house sound.
At the heart of the P-4600 is a heavily reinforced power supply with a large toroidal transformer and generous filtering, feeding parallel push pull output devices that keep control tight even during complex musical passages. Accuphase employs its MCS+ topology and current feedback design to lower distortion and widen bandwidth, while a substantial heat sink structure ensures reliable operation over long listening sessions. The result is an amplifier that combines the drive and efficiency of Class AB with a naturally smooth, low noise presentation.
The P-4600 is intended for the listener who wants a single stereo chassis capable of driving a wide range of loudspeakers with authority, from sensitive floorstanders to more demanding low impedance designs. It pairs beautifully with an Accuphase precision preamplifier and forms the backbone of a serious high end system, with the option to bridge for mono operation when even more power is desired.
Key Features
- Class AB output stage with parallel push pull power transistors for high current delivery
- Instrumentation amplifier configuration with current feedback for wide bandwidth and low distortion
- MCS+ topology to reduce noise and improve signal purity
- Large toroidal power transformer with high capacity filtering for stable performance under load
- Analog power meters with logarithmic scale for intuitive level monitoring
- Balanced and single ended inputs with selectable gain to match a range of preamplifiers
- Bridged mono capability for increased output when driving demanding loudspeakers
- Robust chassis and heat sink construction for long term reliability
- Bi-wire friendly high quality speaker terminals for secure, low resistance connections
How the P-4600 Compares
Accuphase P-4600 vs Accuphase P-7500
The P-7500 sits higher in the Accuphase stereo power amplifier range and legitimately offers more, with greater rated output, a larger power supply, and an even higher damping factor for tighter control of difficult loads. The P-4600 shares the same design philosophy and voicing in a more compact, more accessible chassis. Choose the P-7500 if you drive very demanding speakers in a large room and want maximum headroom. See the Accuphase P-7500.
Accuphase P-4600 vs Accuphase A-48S
The A-48S is a pure Class A stereo power amplifier voiced for a warm, richly textured midrange and exquisite low level detail. The P-4600 uses Class AB to deliver higher peak power and cooler, more efficient operation, making it the more flexible partner for a wide range of loudspeakers. Pick the A-48S for intimate, refined listening and the P-4600 for effortless drive and versatility. See the Accuphase A-48S.
Accuphase P-4600 vs Luxman M-10X
The Luxman M-10X is a large stereo power amplifier with its own distinctive character, offering a smooth and expansive presentation. The P-4600 pursues clarity, low noise, and precise control through its instrumentation amplifier design. Both are excellent choices, so the decision comes down to your preferred tonal character and system synergy. See the Luxman M-10X.
Accuphase P-4600 vs Yamaha M-5000
The Yamaha M-5000 is a symmetrical stereo power amplifier that emphasizes a clean, honest, and neutral reproduction. The P-4600 focuses on high damping factor and stable delivery into low impedance loads with the signature Accuphase refinement. Consider the room, speakers, and the tonal balance you prefer when choosing between them. See the Yamaha M-5000.
Recommended Speakers and Preamplifier
The P-4600 has the current capability to drive demanding loudspeakers with ease, and it reaches its full potential when paired with an Accuphase precision preamplifier. Below are speaker and preamplifier matches that suit its power and refined character.
- Marten Parker Trio Diamond This diamond tweeter floorstander rewards the P-4600 with transparency and speed, and the amplifier's high damping factor keeps its low frequencies taut and controlled.
- Gauder Akustik Arcona 100 MKII SD A detailed, dynamic floorstander that benefits from the P-4600's stable current delivery, resulting in effortless dynamics and clean transients.
- Spendor Classic 200Ti A large, full range design that appreciates the P-4600's authority and refinement, pairing its rich tonal balance with clear, controlled bass.
- Accuphase C-2900 A precision stereo preamplifier that provides a natural, low noise front end and completes the system with fully balanced Accuphase synergy.
- Accuphase C-2300 An excellent value control center within the Accuphase line, offering flexible connectivity and the house sound to match the P-4600.
Frequently Asked Questions
What type of amplifier is the Accuphase P-4600?
It is a Class AB stereo power amplifier designed to deliver high current output with the refined, low noise presentation Accuphase is known for.
How much power does the P-4600 produce?
It is rated at 150 watts per channel into 8 ohms, 240 watts per channel into 4 ohms, and 300 watts per channel into 2 ohms.
Can the P-4600 be used in bridged mono mode?
Yes, it can be configured for bridged mono operation to increase output when driving more demanding loudspeakers, requiring two units for a stereo pair.
Does the P-4600 have balanced inputs?
Yes, it offers both balanced and single ended inputs, so you can match it to a range of preamplifiers.
What preamplifier pairs best with the P-4600?
An Accuphase precision preamplifier such as the C-2300 or C-2900 provides an ideal balanced connection and matched voicing. The flagship C-3900S is also an excellent partner.
What is the damping factor of the P-4600?
The P-4600 has a damping factor of 500, which supports tight, controlled bass across a variety of loudspeakers.
Is the P-4600 suitable for low impedance speakers?
Yes, its high current output stage remains stable into low impedance loads, delivering up to 300 watts per channel into 2 ohms.
What speakers work well with the P-4600?
It pairs well with demanding floorstanders and refined designs such as the Marten Parker Trio Diamond, Gauder Akustik Arcona 100 MKII SD, and Spendor Classic 200Ti.
How is the P-4600 different from the A-48S?
The A-48S is a pure Class A amplifier voiced for warmth and delicacy, while the P-4600 uses Class AB for higher peak power and greater efficiency across a wider range of speakers.
How does the P-4600 compare to the P-7500?
The P-7500 sits higher in the range and offers greater output, a larger power supply, and an even higher damping factor. The P-4600 shares the same design goals in a more compact form.
Does the P-4600 have level meters?
Yes, it features analog power meters with a logarithmic scale for intuitive monitoring of output level.
What is the gain of the P-4600?
The amplifier provides 28 dB of gain, with selectable options to help match different preamplifiers and system requirements.
How heavy is the P-4600?
It weighs approximately 24.8 kg, reflecting its substantial power supply and heat sink construction.
What are the dimensions of the P-4600?
It measures approximately 465 x 211 x 514 mm (W x H x D), so plan for adequate ventilation and shelf depth.
Does the P-4600 run hot?
As a Class AB design it operates more efficiently and cooler than a pure Class A amplifier, though it still benefits from good ventilation.
Can the P-4600 drive large rooms?
Yes, its ample power reserves and stable current delivery make it well suited to larger rooms, especially when paired with efficient loudspeakers.
What technologies are inside the P-4600?
It uses an instrumentation amplifier configuration, current feedback, and MCS+ topology to achieve wide bandwidth, low noise, and low distortion.
What is included in the box?
The package includes the P-4600 amplifier, an AC power cord, the owner's manual, and warranty documentation.
What warranty does the P-4600 include?
It carries a 3 year parts and labor warranty for the original owner when purchased from an authorized dealer.
Why buy from All Elite Audio?
All Elite Audio is an authorized Accuphase dealer based in Maryland, so your P-4600 arrives with full factory warranty and expert support. We offer knowledgeable guidance on system matching and carry the speakers and preamplifiers to build a complete high end system.
