Phono preamplifiers require extra care in the implementation of the design to ensure that no noise is added to the signal. With gains of 10,000 or more, amplified noise can degrade the audio quality.
Swan Song Audio has worked with Step Up Transformers, I to V, Balanced, and Single Ended phono designs.
- Step Up Transformers make the amplification process simpler but in exchange for the infusion of transformer coloration into the audio signal.
- I to V works well with Moving Coil cartridges but not Moving Magnets.
- Balanced designs work well when the rest of the audio system is grounded properly.
- Single Ended is a good “all around” design that works well for MC and MM cartridges. A properly designed SE can provide gain levels in excess of 30,000 times with moderate care in connecting the phono to the rest of the audio system.