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Title: BU120 = "PU" 120
Review: Common problem:Amp fails. Sub will start making a machine gun sound without even having audio signal driving it.C6 capacitor fails. Straight from the BU120 service manual from Infinity's website. There's an appended memo that indicates this is a common problem and to replace the capacitor with an upgraded capacitor (10 micro-farad, 100 volt, non-polar electrolytic).I've had both of these problems. The C6 capacitor basically just got up and disappeared. There was virtually nothing left of it after it blew.The amp was replaced once already, but apparently failed again.I think the speaker itself is good quality, box is well constructed. The circuitry is terrible.
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