Hifi Preamps for your Record Player

You Can Build this Phono Preamp

All the instructions you need to build a complete phono stage are available below. The Muffsy Phono Preamp, MC Head Amp, and Power Supply use only through-hole components, making it super easy to solder.


These projects are suitable for absolutely anyone who has access to a soldering iron and a pair of pliers. Not only because they're easy to build, but also because the power supply uses a wall adapter. You can safely build these kits without handling mains power.

What is Needed to Build the Muffsy Phono Preamp, MC Head Amp and Power Supply?

 
 

An overview of the Muffsy Phono Preamp, MC Head Amp and Power supply.


What is it, why do you need it and what do you need to use it and play your records.


What's Needed?

Instructions for Previous Versions

The current versions of the Muffsy products are using black PCBs. 

Go here to see the build instructions for the blue PCB versions.

Introduction: Learn How to Solder

If you're new to soldering, or you need a brush-up, have a look at these two instructional videos.

Build Instructions: The Muffsy Phono Preamp PP-3 Rev A

 
Detailed Illustrations
 

Go from a bag of components to a great phono stage.


The instructions for building the Muffsy Phono Preamp PP-3 are very detailed, clear and easy to follow.


With the step-by-step illustrations, there will be no room for error.


Follow the link below to get started!


Build the Muffsy Phono Preamp PP-3

Rev A

Build Instructions: The Muffsy MC Head Amp MH-1

 
Complete Guide
 

Want to use a low output MC cartridge with the MM phono stage of your choice? The Muffsy MC Head Amp is the answer.


These illustrated instructions will take you all the way to a finished MC head amp, just follow the link below:

Build Instructions: The Muffsy Hifi Dual Power Supply

 
Step-by-Step Instructions
 

The best option for powering the Muffsy Phono Preamp is using this power supply. The ripple on this power supply is a minuscule 0.1 mV! 


Not only is it the same width as the phono stage, it even uses a wall adapter so you don't have to play around with mains power.


Follow the link below to see the build instructions for the Muffsy Hifi Dual Power Supply!


Build the Muffsy Hifi Dual PSU v3

Build Instructions: The Back Panel

 
Phono stage back panel
 

The back panel is where you find the audio input, audio output, ground screw and power input. In this example, the power button also has been placed on the back panel.


There are many ways to do the back panel. Even if you choose to do it in another fashion, you will still get the basics of the inputs/outputs and grounding.


The instructions for the Muffsy Phono Preamp and MC Head Amp contains guides on assembling the back panel.

Build Instructions: Audio Wiring

 
Audio input and output
 

Connect the RCA connectors and the ground screw on the back panel with the phono stage.


The instructions for the Muffsy Phono Preamp and MC Head Amp contains guides on the audio wiring.

Build Instructions: Powering the Phono Stage

 
Power Supply Wiring
 

The Muffsy Phono Stage needs a dual power supply to operate.


The instructions for the Muffsy Phono Preamp and MC Head Amp even contains guides on how to do the power wiring.



There are a few ways to power your Muffsy kits, two power supplies and battery operation. 


Follow the link below for more power supply instructions!

Powering the Muffsy Phono Stage

Build Instructions: Enclosure

 
Phono stage and power supply in the enclosure
 

To finalize the construction, here's how to build an enclosure for the Muffsy Phono Preamp.


Use the guide for building your enclosure, or as inspiration for your own custom build.


The instructions for the Muffsy Phono Preamp and MC Head Amp even contains guides on how to mount your products in a B0905 enclosure.

Moving Coil with the Muffsy Phono Preamp and MC Head Amp

 
 

Here's how to use the Muffsy Phono Preamp and MC Head Amp.

Build them in their recommended enclosure and hook them up, or put both of them in a larger enclosure and switch between MM and MC.


 How to Solder

EEVBlog has a wealth of information, and their soldering instructional videos are great for all audiences from beginner to pro. They provide all the tricks in the book, and then some.


Not only is soldering a skill you'll learn quickly, it's actually quite hard to get it wrong once you get the basics. These two videos will show you what tools you need, and how to actually solder through-hole components:

Please note that the use of lead-based solder may be illegal where you live, check your local legislation before using solder that contains lead.

 

Soldering Tools

 

Through-hole Soldering