Actually- The weight of the cartridge is not what's important. The Black Widow is a VERY low effective mass arm, and needs a high-compliance cartridge. The Blue-Point(at 12x10-6cm/dyne) is considered a fairly low compliance cartridge. Here's a good treatise on compatibilty: (http://www.gcaudio.com/resources/howtos/tonearmcartridge.html) But then- That's science and physics, which don't ALWAYS apply when it comes to audio.
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