TAF 4312i Microphone Preamplifier

The TAF 4312i is a high quality 4 channels mic/line preamplifier hosted in a 1U rack case. Big and punchy sound with a smooth top end.

The design employs a 312 preamplifier circuit with a discrete 2520 type operational amplifier and transformers on both inputs and outputs. High headroom and low distortion is a characteristic of this design. Only high quality components with tight tolerances are used. Also due to carefully placement of inside components, a very low crosstalk between channels is achieved.

Comes with gold Neutrik XLR input and output connectors and gold discrete socketed opamps for ease of service or custom swapping for different opamps. A separate power supply helps to achieve very low noise operation.

All of the channels have two transformer isolated outputs per channel at the back and a HI Z input on front panel for instruments and keyboards. All of these features makes the TAF 4312i a versatile unit for professional studio or live use.

Can be ordered without TAF 312 internal boards. This is a good solution for those who have the luxury of having an original vintage 312 board and want to make a full preamplifier out of them. You have to open the unit and plug those boards to the internal 15 pin connector connector and they will be ready to work with all of the features. Can also be ordered with Jensen input transformer option if desired.

  • 4 channels of the classic American console sound.
  • Front panel switch for 20 dB input pad, phantom power and polarity reversal.
  • HI Z input on the front panel.
  • Up to 65 dB of gain.
  • FAB 2503 custom made output transformers.
  • Custom choice of with or without 312 cards.
  • Soldered by hand.

Product Information

Number of channels


Number of microphone inputs


Instrument input


Phantom power


Phase reverse


Number of outputs

2 per channel

Output type


Power requirements

230/115 Volts AC

This is a custom order item . You have to specify if you want it complete with 312 plugin boards or without them as well as input transformer options (Jensen 110K-HPC , Cinemag 75101A pcb version, custom 2622).

Send us an email for pricing if you want different options.

This item is hand-built to order, to ensure the best attention to detail is paid to its construction. This allows us to build a very high quality product overall. Please allow at least 7-10 business days for your order to be built and then shipped.

Introductory price:


21% VAT will be added on countries within the EU


Questions or comments?

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