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I own the older Korean-made version of this with the 3-band EQ, Master tone, and Master volume controls.
I gigged heavily for about a year with this bass and had 0 issues aside from the strap pin popping out - a very common and easily fixable problem. It was versatile enough to use in folk metal, death metal, and jazz with no issues. My only complaint (and it relates to the SR series in general) is that a 35" scale would be preferable for a 5-string, but given the appropriate string gauge and an amp that can handle the harmonics this works very well. Can be muddy on some amps, but the low B had a very nice, thick chunky tone through my old Ampeg SVT-450H.
I can't speak to the quality of the newer SR505s, but the old Korean ones like mine are top-notch.