I like to see no or small difference in overload. The large amounts we see here is not good for the overload characteristics. That said, I agree that I have not posted this kind of measurement enough to get a good handle of the range of the values we get.
5 mV = -46 dBV at input and with (measured) 36.8 dB of gain it results into -46 dBV + 36.8 dB = -9.2 dBV at output. 1 V would be exactly 0 dBV which means the noise floor with 1 V at output would be 9.2 dB better than what you get with 5 mV input. That's pretty significant and should explain the difference in S/N ratio. The same applies to many other measurements presented as well.
Direct comparison between Musical Surroundings Phonomena 2+ and the Zen had a marked difference with hum in playback. The Zen had overall noise about 12 db less than the Phonomena. This was measured at a fixed distance from the speaker at a fixed volume measured by my iPhone spectrum app. I am surprised it did not measure better given my preference of the Zen over the more expensive Phonomena. Maybe it simply comes down to power supply noise and RIAA accuracy.The record grove noise and distortion will be quite high by itself. And the noise is loaded in lower frequencies where we are less sensitive. So probably not. I let owners give real-life answers.
If your line stage supports it, you could use the balanced output. You get 6 db more gain, which will get you 42 db on setting one.I purchased one in July of last year new for $130. I've been very happy with it, though I wish the MM gain was 40 db rather than 36.
Hey can anyone please explain why all the phono amps noise floors rise at lower frequencies? They all have that same tendency yet preamps and power amps don't do this. Aaaanyone?
Frequencies below 1 khz are attenuated by as much as 20 db while above 1 khz are boosted by as much as 20 db during the cutting process. Not linear but a curve. The opposite occurs during playback to get a "flat" frequency response.I don't know really ... but remember the RIAA equalization ... phono preamps apply huge levels of amplification in lower frequencies, maybe that's the reason
Yes and the noise floor follows approximately the shape of RIAA equalization unless there's some sort of anomaly that bends either high or low frequencies.Frequencies below 1 khz are attenuated by as much as 20 db while above 1 khz are boosted by as much as 20 db during the cutting process. Not linear but a curve. The opposite occurs during playback to get a "flat" frequency response.