Anyone famaliar with the manufacturer,and in particular this pre amp.The credentials and testimonials seem impressive.The advertised 10 day audition is appealing.
There also seems to be more dynamic range in that sometimes familar recordings go suddenly louder or softer than I am used to hearing on other equipment
That's exactly what happens when your equipment is quiet.
You're able to talk (without shouting) at normal conversation levels while music plays.
Running dedicated 10-2 lines helped further, the only thing I did was drop the ground inside my preamp at the IEC to eliminate a hum and I made a cutom black acrylic lid for mine.
Joe, Both Victor and Joseph are very helpful in recommending certain vintage tuners. Joseph might have a few in stock that he has for sale. Check with Victor when you're ready. Also, the louder and softer sound effects that you hear with familiar music are the macro amd micro dynamics discussed which the preamp excels at.
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