Technics SU-A40 Control Amplifier & SE-M100 Power Amplifier Set

Why Buy New is pleased to offer for sale this brilliant set of Technics SU-A40 Control Amplifier & SE-M100 Power Amplifier. 

It has been professionally repackaged to ensure safe delivery and comes with power cables.

This has been tested and is in full working order. It is sold with a 3 month warranty.

The cosmetic condition is good. There are a few minor marks. Please see the condition in the images.

FREE national courier delivery.

Why Buy... from us?
Because all of our items go through a full inspection, get serviced (if required), PAT tested for electrical safety, deep cleaned and all come with a warranty. We are 100% committed to customer care and are always on hand pre or post-delivery for technical help and advice.

Technics SU-A40

Stereo Control Amplifier | 1989–1991
Designed to Pair with SE-M100 Power Amp | Class AA Circuitry

The Technics SU-A40 is a high-performance stereo preamplifier engineered for precise signal handling and audiophile-grade sound. Designed to partner with the SE-M100 Digital Direct Drive Power Amplifier, it incorporates advanced Class AA amplification, high-purity components, and low-noise power regulation for exceptional clarity across analogue and digital sources. Users praise its expansive frequency response, phono performance, and transparent sound reproduction.

Description

Matching the SE-M100 in both form and function, the SU-A40 features:

• Class AA Phono EQ & Output Circuitry:
  Utilises a dual amplifier configuration—voltage amplification handled separately from current, resulting in lower distortion and reduced influence from RIAA network impedance shifts.
  
• Advanced Phono Stage:
  Low-noise FETs and high-slew-rate circuitry offer S/N ratios of 79 dB (MM) and 74 dB (MC), with distortion as low as 0.009% (MM, 20 Hz–20 kHz)—ideal for vinyl playback.
  
• Biotech Electrolytic Capacitors:
  Employs a biotechnology-enhanced, additive-free electrolyte to minimise signal distortion, preserving the integrity of Class AA signal paths.
  
• Active Servo Power Supply:
  A stabilised voltage IC and a wide-band IC work in tandem for low-noise, high-stability voltage regulation, ensuring pure signal amplification even at low levels.
  
• OCC/OFC Wiring:
  High-grade oxygen-free copper conductors maintain consistent signal integrity across the entire frequency range, contributing to detailed and dynamic sound.
  
  

Specifications

• Frequency Response: 0.8 Hz – 150 kHz
  
• Total Harmonic Distortion: 0.003%
  
• Input Sensitivity:
  0.17 mV (MC)
  2.5 mV (MM)
  150 mV (Line)
  
• Signal-to-Noise Ratio:
  74 dB (MC)
  79 dB (MM)
  106 dB (Line)
  
• Channel Separation: 50 dB (Line)
  
• Output Level:
  150 mV (Line)
  1 V (Pre Out)
  
• Dimensions (W × H × D): 430 × 103 × 290 mm
  
• Weight: 4 kg
  
  

Technics SE-M100

Stereo Power Amplifier | 1989–1991
Digital Direct Drive System | Class AA Technology

The Technics SE-M100 stands as a premier example of late-80s audio engineering. Built to complement the SU-A40 control amplifier, it features Technics' innovative Digital Direct Drive System and Class AA architecture, offering exceptional transparency, ultra-low distortion, and a noise floor virtually as low as the source itself. Users highlight its musical neutrality, immense power reserve, and remarkable clarity across the spectrum.

Description

Engineered for high-fidelity digital reproduction, the SE-M100 was designed to unlock the full potential of CD and digital audio sources.

• Digital Direct Drive Architecture:
  Connects directly to the digital output of compatible CD players, bypassing unnecessary signal processing stages and preserving full signal integrity.
  
• Unity Gain Power Stage:
  A zero dB voltage amplification design minimises signal alteration and keeps the noise floor equal to that of the source component, regardless of volume level.
  
• Class AA Output Stage:
  Offers separate current and voltage signal paths for improved linearity and distortion-free amplification. Especially effective when paired with Technics’ SU-A40 preamp.
  
  

Specifications

• Power Output: 115 watts per channel into 8 Ω (stereo)
  
• Frequency Response: 0.8 Hz – 120 kHz
  
• Total Harmonic Distortion (THD): 0.005%
  
• Damping Factor: 110
  
• Input Sensitivity: 1 V
  
• Signal-to-Noise Ratio (SNR): 120 dB
  
• Speaker Load Impedance: 4 Ω – 16 Ω
  
• Dimensions (W × H × D): 430 × 161 × 403 mm
  
• Weight: 16.5 kg