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ELTIM Preamp modules catalog


ELTIM Preamplifier / Voltage Controlled Amplifier / buffer modules Catalog       updated 18 October 2018

We also have similar pages for our Power amplifier and Power Supply modules

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ELTIM Preamplifier modules:
Preamplifier main boards




This preamplifier is an "all in one" module:
  • Integrated symmetrical power supply
  • Netfilter 0,6A on board
  • Location for optional symmetrical voltage regulator board
  • PCB mounted in/out connectors can be mounted directly on the board
  • IN/OUT buffer modules, line or balanced can be munted instead
  • Electronic switching circuit by relays with silver plated contacts
           - Three inputs        - Two outputs
  • Direct mounting of a volume potentiometer or
  • Mounting positions for an optional Voltage Controlled Amplifier (VCA) board
  • Optional MM/MC pre-preamplifier parts can be mounted (standard on + version)
  • Choise of a cheap regular or a nice toroidal transformer
  • A frontpanel PCB can be mounted where volume potmeter, selector switch, mute switch are mounted. I.c.w. VCA module also a dB reading can be mounted.  
  • Extra connections for on/off switch, power amp transformer and other electronics.

This module fits exactly in any MODU Galaxy 230x170mm (or deeper) cabinet.




This preamplifier is an "all in one" module:
  • Integrated symmetrical power supply
  • Netfilter 0,6A on board
  • Location for optional symmetrical voltage regulator board
  • PCB mounted in/out connectors can be mounted directly on the board (shown)
  • IN/OUT buffer modules, line or balanced can be munted instead
  • Electronic switching circuit by relays with silver plated contacts
           - Six inputs          Two outputs
  • Direct mounting of a volume potentiometer or
  • Mounting position for an optional Voltage Controlled Amplifier (VCA) board
  • Optional MM/MC pre-preamplifier parts can be mounted (standard on + version)
  • Choise of a cheap regular or a nice toroidal transformer
  • A frontpanel PCB can be mounted where volume potmeter, selector switch, mute switch are mounted. I.c.w. VCA module also a dB reading can be mounted.
  • Extra connections for on/off switch, power amp transformer and other electronics.

This module fits exactly in any MODU Galaxy 330x170mm (or deeper) cabinet.



This classy preamplifier is based on a main "backbone" PCB, mainly only containing the in/out signal bus structure. In/out circuits, etc. are mounted to it.

  • 6x Inputs (line or balanced) are separate, buffered circuits with switching relay
  • 2x Outputs (line or balanced) are separate, buffered circuits with mute relay
  • Power Supply (by choise) is separated for optimal hum/noise figures
  • Direct connecting of a volume potentiometer or
  • You can mount one of our Voltage Controlled Amplifier modules

This system is in development.


Preamplifier based on Texas Instruments OPA2134 dual opamp.

In standard version supplied for a single gain/impedance setting

Optional we can supply it with
  • 16 impedance settings by SMD rotary selectors at the back
  • 16 gain settings by SMD rotary selectors at the back

This circuit is identical as on our Pre-230 and Pre-330 preamplifiers (incl. presets!)

Voltage Controlled Amplifier / buffer modules




The attenuation/gain is regulated by a special quality IC.
  • THAT 2162 Voltage Controlled Amplifier IC.
  • Current driven output buffer (dual opamp IC). Even a Burson Dual fits !
  • Controlled by a 0-5Vdc signal or
  • Digital SPI data (256 steps).
  • -80 - +40mV output for digital dB reading with cheap 200mV meter.
  • Fits directly on all our preamplifier designs.

The attenuation/gain is regulated by a special quality IC.
  • THAT 2180 Voltage Controlled Amplifier IC.
  • Current driven output buffer (dual opamp IC). Even a Burson Dual fits !
  • Controlled by a 0-5Vdc signal or
  • Digital SPI data (1024 steps).
  • -90 - +30mV output for digital dB reading with cheap 200mV meter.
  • Fits directly on all our preamplifier designs.


The attenuation/gain is regulated by two special quality IC's.
  • 2x THAT 2180 Voltage Controlled Amplifier IC.
  • Dual current driven output buffer IC's. Even Burson single's fits !
  • Controlled by a 0-5Vdc signal or
  • Digital SPI data (4096 steps).
  • -90 - +30mV output for digital dB reading with cheap 200mV meter.
  • Fits directly on all our preamplifier designs.

Audio signal buffer modules
Audio Signal buffer circuits for our Pre-230 and Pre-330 preamplifier boards, all using quality connectors. (in development),
Input buffers
Output buffers

Basic input buffer module without electronics

Basic output buffer module without electronics

Line input buffer module with OPA2134 IC

Line output buffer module with OPA2134 IC

Balanced input buffer module with THAT 1646 IC

Balanced output buffer module with THAT 1646 IC

Universal audio signal buffer circuits
with input connector
with output connector

Line input buffer circuit, providing a buffered line signal for internal use.

  • Quality RCA input connector
  • THAT 134x high quality IC
  • Zener diode circuits for using high supply voltages

Balanced input buffer circuit providing a line output signal.

  • Quality RCA output connector
  • THAT 120x high quality IC



Line input buffer circuit providing a buffered balanced signal for internal use.
Can also be used for bridged amplifiers.

  • Quality RCA input connector
  • THAT 1646 high quality IC
  • Zener diode circuits for using high supply voltages

Balanced input buffer circuit providing a line output signal.

  • Quality RCA output connector
  • THAT 124x high quality IC

Line input buffer circuit providing a buffered balanced signal for internal use.
Can also be used for bridged amplifiers providing counterphased signals.

  • THAT 2134 high quality IC
  • Zener diode circuits for using high supply voltages


Balanced input buffer circuit providing a line output signal.

  • Quality RCA output connector
  • THAT 134x high quality IC

Balanced input buffer circuit providing a buffered line signal for internal use.

  • THAT 120x high quality IC
  • Zener diode circuits for using high supply voltages

Line input buffer circuit providing a balanced output signal.

  • Quality XLR output connector
  • THAT 1646 high quality IC

Balanced input buffer circuit providing a buffered line signal for internal use.

  • THAT 124x high quality IC
  • Zener diode circuits for using high supply voltages

Line input buffer circuit providing a balanced output signal.

  • Quality XLR output connector
  • THAT 2134 high quality IC

Balanced input buffer circuit providing a buffered balanced signal for internal use.

  • THAT 128x high quality IC

Balanced input buffer circuit providing a balanced output signal.

  • Quality XLR output connector
  • THAT 128x high quality IC

Note that most of these modules are also available as DIY kit.

Dealers for these kits and built modules are most welcome.  Also OEM       MAIL