The amplifier is CE approved and has 2 years warranty.


Download documentation:

Manual (pdf)

Similar products:

One channel - A400

Two channels - A400D

Phase inverter - A400DI

Next higher voltage - A600

Same functionality but higher voltage - A800X

Faster - the amplifier can be adjusted for higher slew rate if the load is smaller than 400 pF. Please email your inquiry to

Special requirements - send email to

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High Voltage Linear Amplifier A400X

high-voltage linear amplifier F10A

This unit is a version of A400 amplifier equipped with two inputs, DC-offset and output atenuation.

Please see A400 page for technical details of the high voltage amplifier part.


Input A is a normal non-inverting one. Using this input alone makes A400X functionally identical with A400 amplifier.

Input B can act as a inverting or non-inverting depending on the position of the corresponding switch.


Applying different signals to both input results in their amplified sum or difference:

superposition of inputs
DC offset

A DC level, adjustable within 0...+10V range, is provided on the front panel from two BNC contacts marked “OFFSET OUT”. Both contacts are internally connected to simplify monitoring of the output. For bipolar operation the DC level should be supplied to ±B input. Please note that the maximum total amplitude of superposed A and B signals should stay within ±10V range, otherwise clipping will occur.

Output attenuation

By means of dedicated switch the output can be attenuated 100 times (-40dB) for safe handling.