first measured the frequency response of the Musical Fidelity M3x Vinyl phono stage’s moving-magnet input using RIAA equalisation, the result of which is shown in Graph 1. You can see that there’s a very slight ‘tilt’ to the overall response that would tend to emphasise the level of the lower frequencies and reduce the level of the very highest frequencies, but if you look at the vertical scale of this graph you’ll see that the top of it represents a +1dB increase and the bottom a 1dB decrease. This means that the response as shown is 20Hz to 20kHz
