• M-50-P Pre Amplifier


    Single Ended Class A pre amplifier.


    Built as standard for UK voltage, can be built to operate elsewhere. Please specify when ordering. 


    Inputs:  All inputs are specified for a line‐level output of 1 volt into a 10kΩ load.


    Moving Coil: Standard loading 100Ω ‐ 470Ω with a loading capacitance 1000pF. Input sensitivity is typically 100µV. Frequency 20Hz – 20kHz ± 0.1dB.


    Moving Magnet: 
    Standard loading 47kΩ with a loading capacitance 100pF. 
    Input sensitivity is typically 5mV – 10mV. 
    Frequency 20Hz – 20kHz ± 0.1dB. 

    Aux input 1: 
    Standard input for a line levels device. 
    Input senstivity 200mV typical. 
    Frequency 0.5Hz – 200kHz ± 0.1dB. 

    Aux input 2: 
    This input has a subsonic and DC roll‐off making it ideal for portable devices which often have small DC on their outputs. 
    Input senstivity 200mV typical. 
    Frequency 1.5Hz – 200kHz ± 0.1dB  

    Outputs 1 & 2: The frequency response is specified for 1 volt output, both channels driven. 



    • Minimum load 100Ω 16Hz – 200kHz. 
    • Nominal load 10KΩ 0.5Hz – 200kHz. 
    • High level load 100KΩ 0.5Hz – 200kHz. 




    • Frequency Response 10Hz – 50kHz into 65Ω load. 
    • Maximum output voltage with no load is 15V Peak. 
    • 1 volt input level gives a peak output of 4V. 


    Power Requirements: 
    Standby Power Less than 1W.

    Contact us: info@ABCaudio.biz  United Kingdom. EWA designs for cables and amplifiers, by Colin Wonfor.

    All text and images copyright 2020. ABCaudio and Elsdon & Wonfor Audio.