top of page

Experience the transformative power of high-fidelity audio with the Sugden Masterclass LA-4 Pre-amplifier. This high-quality active pre-amplifier boasts exceptional performance and unmatched control, making it the perfect centerpiece for your audio system.


Precision Engineering for Uncompromising Sound:

  • Class A Output Stage: The LA-4 utilizes a sophisticated Class A output stage, ensuring a smooth, natural presentation of your music. This meticulously designed circuit delivers exceptional detail and captures the delicate nuances of your audio sources.
  • Current Shunt Differential Power Supplies: Experience the power and control of the LA-4's unique power supply design. Each gain stage benefits from dedicated current shunt differential power supplies, enabling them to handle the fastest transients and most powerful musical passages with remarkable ease and precision.


Unwavering Control and Flexibility:

  • High Gain and Control: Take complete command of your listening experience with the LA-4's high gain and iron-fisted control capabilities. This pre-amplifier ensures seamless integration with even demanding power amplifiers, allowing you to tailor the sound to your exact preferences.
  • Comprehensive Input and Output Options: Connect a wide range of audio sources and integrate the LA-4 effortlessly into your existing setup. The LA-4 features a versatile selection of inputs and outputs, including four line-level inputs, one tape input, one balanced input, two line-level outputs, a fixed tape output, and a balanced output.
  • Motorised Remote Control Convenience: Control the LA-4 from the comfort of your listening position using the included RC5-compatible remote control, providing effortless volume adjustment and source selection.


Unmatched Sonic Performance:

  • High-End Construction: The LA-4 is meticulously crafted with the finest components. Gold-plated circuit boards, relay switching of all inputs and outputs, and specially selected transistors and capacitors guarantee exceptional signal fidelity and a long-lasting listening experience.
  • Uncompromising Sonic Performance: Immerse yourself in the captivating world of high-fidelity audio. The LA-4's meticulously designed electronic circuitry prioritizes sonic performance above all else, ensuring a transparent and uncolored presentation of your music.


Elevate your audio system to new heights with the Sugden Masterclass LA-4 Pre-amplifier. Experience the perfect blend of power, control, and sonic purity, designed to unleash the full potential of your power amplifier and rediscover the magic of music.

Sugden Masterclass LA-4 Pre-amplifier

PriceFrom R98 100,00
  • Input Sensitivity:
    100mV for 1 Volt out

  • Maximum Output:
    10 Volts

  • Frequency Response:
    +/- 0.1dB from 15Hz to 30kHz

  • Bandwidth:
    6Hz to 300kHz

  • Signal to Noise Ratio:
    > 90dB

  • Distortion:
    < 0.006% @ 1kHz, 1 Volt out

  • Dimensions:
    75 x 430 x 350mm (hwd)

  • Weight:
    7kg (packed)

  • Inputs:
    Four line level inputs, one tape input, one balanced input, bypass input

  • Outputs:
    Two line level outputs, fixed tape output, balanced output

  • Volume Control:
    Motorised remote control RC5 compatible

  • Recording:
    Tape output defeat

bottom of page