Accuphase A-48S Class-A Stereo Power Amplifier

Accuphase A-48S Class-A Stereo Power Amplifier
Pure Class A refinement with exceptional control and musical expressiveness.

The Accuphase A-48S Class-A Stereo Power Amplifier delivers outstanding musicality and precision for audiophiles who value purity and control. Rated at 50 watts per channel into 8 ohms, 100 watts into 4 ohms, and up to 400 watts into 1 ohm, the Accuphase A-48S offers effortless power and the rich tonal quality only Class A design can produce.

At its heart, the Accuphase A-48S uses six parallel push-pull MOSFETs per channel, a fully balanced instrumentation amplifier input stage, and Accuphase’s renowned current-feedback circuitry. These design elements provide extremely low distortion, high stability, and the smooth, dynamic character that defines Accuphase amplification. A damping factor of 1,000 ensures firm bass response and total speaker control.

The amplifier’s construction reflects meticulous Japanese craftsmanship with precision-matched components, a massive toroidal transformer, large filter capacitors, and Accuphase’s signature analog power meters. Both balanced XLR and unbalanced RCA inputs are provided, along with a selectable gain control for optimal system matching. The Accuphase A-48S is ideal for high-performance two-channel systems or as part of a reference-level setup in bridged mono configuration.

Designed for listeners who appreciate both technical excellence and musical emotion, the Accuphase A-48S brings recordings to life with remarkable clarity and natural warmth.

For assistance or product questions, call 443-402-5055 or text 443-402-5064 to reach our team. All Elite Audio is an authorized Maryland dealer with a full home audio showroom.

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Key Specifications:
• Rated Output: 50 W/ch into 8 Ω; 100 W into 4 Ω; 200 W into 2 Ω; 400 W into 1 Ω (music signal)
• Amplifier Class: Pure Class A
• Damping Factor: ≥ 1,000
• Signal-to-Noise Ratio: 118 dB (line input)
• Total Harmonic Distortion: 0.03% (4–16 Ω)
• Gain Selector: MAX, –3 dB, –6 dB, –12 dB
• Inputs: Balanced XLR and Unbalanced RCA
• Frequency Response: 0.5 Hz–160 kHz (+0/–3 dB)
• Dimensions (W × H × D): 465 × 211 × 464 mm (18.3″ × 8.3″ × 18.3″)
• Weight: 34.8 kg (76.7 lbs)
• In Stock

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Top 20 Questions About the Accuphase A-48S Class-A Stereo Power Amplifier

What type of amplifier is the Accuphase A-48S?
The Accuphase A-48S is a pure Class A stereo power amplifier designed for ultimate sound purity and linearity.

How much power does the Accuphase A-48S deliver?
It delivers 50 watts per channel into 8 ohms, 100 watts into 4 ohms, 200 watts into 2 ohms, and 400 watts into 1 ohm.

What is special about Class A operation in the Accuphase A-48S?
Class A operation keeps the output devices active at all times for unmatched smoothness and the lowest possible distortion.

What is the damping factor of the Accuphase A-48S?
The damping factor is 1,000, ensuring deep, accurate bass and strong control over speaker movement.

What inputs are available on the Accuphase A-48S?
It features both balanced XLR and unbalanced RCA inputs for flexible connectivity.

Can the Accuphase A-48S be bridged for more power?
Yes. Two Accuphase A-48S amplifiers can be bridged for high-power mono operation.

Is the Accuphase A-48S stable with low-impedance speakers?
Yes, it is stable down to 1 ohm and delivers clean, controlled performance into difficult loads.

What is the signal-to-noise ratio of the Accuphase A-48S?
The signal-to-noise ratio is an impressive 118 dB, resulting in exceptionally quiet operation and fine detail.

How does the Accuphase A-48S sound?
It delivers warm, natural mids, silky highs, and deep, perfectly controlled bass — ideal for critical listening.

What protection features does the Accuphase A-48S include?
It features MOSFET speaker switching, overload protection, thermal control, and short-circuit safeguards.

What kind of power supply does the Accuphase A-48S use?
The amplifier uses a large toroidal transformer and oversized filter capacitors for excellent current delivery.

What are the dimensions and weight of the Accuphase A-48S?
It measures 465 × 211 × 464 mm and weighs 34.8 kg (76.7 lbs).

Does the Accuphase A-48S have adjustable gain settings?
Yes, selectable gain settings include MAX, –3 dB, –6 dB, and –12 dB.

Where is the Accuphase A-48S manufactured?
The A-48S is made in Japan, reflecting Accuphase’s commitment to precision craftsmanship and reliability.

Is the Accuphase A-48S suitable for large speakers?
Yes, it easily controls large and complex speaker designs due to its high current capability.

Can the Accuphase A-48S drive small bookshelf speakers?
Yes. While powerful, its smooth Class A output is equally well-suited for smaller speakers, providing detail and warmth.

Does the Accuphase A-48S run hot?
As a Class A design, it operates warm to the touch and requires adequate ventilation.

Who is the Accuphase A-48S designed for?
It’s designed for discerning audiophiles seeking a combination of tonal beauty, dynamic range, and absolute transparency.

What is the warranty on the Accuphase A-48S?
The amplifier includes a standard 3-year manufacturer warranty through authorized dealers.

How can I get expert help with the Accuphase A-48S?
For assistance or product questions, call 443-402-5055 or text 443-402-5064 to reach our team at All Elite Audio, your authorized Maryland dealer with a full home audio showroom.