Hi How long it took for your Shelter to fully break-in?I have mine played for 10-12 hours already and noticed a little bit of improvement but it is still sounds kinda tiny.Thanks.
Output of the 501 Mk II is 0.5 mV at 1kHz 5cm/sec., certainly not "very low" but rather medium output. 60 dB gain should be sufficient as long as noise is not excessive and input impedance loading is correct.
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