30 November 2008

Moving Magnet Phono Preamp Kit

Mark in Australia has put together a moving magnet phono preamplifier using a electronics hobby kit. The phono preamp kit provides everything you need except minus an enclosure and a power supply (AC walwart). The circuitry is contained on a printed circuit board (PCB) and consists of operational amplifiers (opamps) with up to three equalization compensation circuits which can be selected with jumpers or a switch. The kit comes with LM833, but you can use which ever opamp you prefer. The power supply is also on the PCB and uses 7812 / 7912 regulators. The design supports all of the common compensations and several 78 compensations as well.

Phono Preamp Kit
The enclosure and power source need to be provided. For the power supply Mark used a walwart (15VAC) and the circuitry is contained in a plastic (ABS) enclosure. The inputs/output were moved to the rear.

Moving Magnet Phono Preamp Kit Enclosure

Mark reports that the kit is dead quiet, performs well and can hold it's own against the popular Pro-Ject Phono Box SE preamp. See the project page: DIY MM Phono Preamplifier Kit (Moving Magnet) for full details.

More DIY Phono Projects


  1. Thanks for the heads up on this kit. I will try it, but I want to try and power it with two 9 volt batteries instead of an externally supply.


  2. Informative post.
    Electronics is some more complicated but with an all in one gadget,it's now simple and convenient.