Fun with the Seta L20 mk2 Voltage and Current-Mode MC/MM Phono Preamplifier

Seta - Balanced Direct Coupled Ultra Wide Bandwidth Phono Preamplifiers

Seta L20 - Intermodulation Distortion (19 kHz : 20 kHz mixed 1 : 1)

This is a distortion measurement of the Seta L20.
There is just a barely detectable amount of IMD apparent (at 1 kHz, 2 kHz, the difference frequencies; and 17, 18, 21, 22, and 23 kHz). 'Nuff said!


  • 1. The rising baseline at higher frequencies is from the analog to digital converter's noise shaping. This is the case with all modern high performance ADCs.
  • 2. Measurement trap for young players: some of the distortion is actually lower than it appears in the graph!
Click here for a technical sidebar explanation of the above "measurement trap."

Links to other Seta L20 measurements