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A-48 Stereo Power Amplifier

Vendor: Accuphase
A-48 Stereo Power Amplifier - Trimira
A-48 Stereo Power Amplifier



A-48 Stereo Power Amplifier

Featuring a six-fold parallel push-pull architecture with power MOS-FETs, as well as ideal gain allocation realized with discrete semiconductors in an instrumentation amplifier configuration, the A-48 harnesses a wealth of advanced technology. Its outstanding performance is exemplified by a signal/noise ratio of 117 dB, output of 360 watts into 1 ohm (music signals), and a damping factor of 800. The newly designed output protection circuit can detect any short-circuiting of the speaker terminals, for complete peace of mind. This power amplifier is the ultimate instrument for immersive music appreciation on the highest level.

  • Power MOS-FETs in 6-parallel push-pull configuration
  • Linear output characteristics over entire load impedance range
  • Strong power supply with massive toroidal transformer and large 60,000 μF filtering capacitors
  • Instrumentation amplifier principle
  • High-gain signal input section in discrete configuration
  • Dedicated power supply for signal input section
  • Polarity switching for balanced input connectors
  • MCS+ circuit topologys
  • Current feedback principle in amplification circuitry
  • Protection circuitry using MOS-FET switches
  • High damping factor of 800
  • Speaker output protection circuit guards against short-circuiting
  • Two sets of large speaker terminals
  • 4-step gain control
  • Support for bi-amping and bridged mode
  • Aluminum top plate with hairline finish




Continuous Average Output power (20-20,000 Hz)

Load 8 ohms 4 ohms 2 ohms 1 ohm
Normal / Bi-amping connection 45 W 90W 180W 360W*1
Bridged connection 180W 360W 720W*1   - 


Total Harmonic Distortion


Load 2 ohms 4 to 16 ohms 
Normal  Bi-amping connection 0.05% 0.03%
Bridged connection  -  0.05%
Intermodulation Distortion 0.01% 


(A-weighted, with input shorted)

At rated continuous average output

Gain selector at MAX 117dB
Gain selector at -12dB 122dB 
Damping Factor


Frequency Response

At rated continuous average output: 20 - 20 000 Hz + 0 - 0.2dB

At 1 watt output: 0.5 - 160000Hz +0 - 3.0dB



Selector position MAX -3dB -6dB -12d-B 
Normal / Bridged / Bi-amping connection 28.0dB 25.0dB 22.0dBn 16.0dB
Input Impedance
Balanced input 40 kilohms
Line input 20 kilohms 


Output Load Impedance


Normal / Bi-amping connection 2 to 16 ohms*2
Bridged connection 4 to 16 ohms *3 
Power Meter



Format Logarithmic scale, with indication switch
Display range 

-infinite to +3dB

(indication in db and %)

Hold time infinite
In bridged mode Same indication for left and right
Power Requirements 120/220/230 V AC, 50/60 Hz
Power Consumption

180 watts idle

427 watts in accordance with IEC 60065

Maximum Dimensions

Width: 465mm (18.31")

Height: 211mm (8.31")

Depth: 464mm (18.27")


33.0kg (72.8 lbs) net

40.0kg (88.2 lbs) in shipping carton



*1 With music signals only

*2 1-ohms load. permissible with music signals only

*3 2-ohms load permissible with music signals only

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Our in-house team can service those in Brisbane, the Gold Coast, and the Sunshine Coast. Give us a call to get an obligation-free quote today!

*the term 'professional bodybuilders' is used here loosely...

Our refund policy operates in a 30-day window - after this time we are unable to accept the product and cannot issue a refund. Don't worry, our products are hand picked from thousands of luxury brands to ensure you are only offered the best of the best so we doubt you'll need to consider this policy at all. If you are concerned about making the wrong decision when it comes to your purchase, please feel free to talk with our team of experts who can advise you on equipment based on your personal music taste, aesthetics, and the layout of your listening room. Still not convinced? Discuss the possibility of a loan (trial period) with our experts and hear the difference yourself.

Our refund policy can be viewed here.

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