thegrobe
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Posts: 25
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Okay, here's a weird one... Of course you folks following this thread remember my comments about background hum I can faintly hear it with LCD-3, and very much with IEM's, pretty much makes the amp not useable for me with CIEM's. I sent the amp back to have it checked out, everything was normal, warranty was transferred so it wasn't a wasted trip at least. So I continue to fool around with this, Trying power conditioning, etc. as I REALLY want my Taboo background silent so I can use my CIEM's. The CSP3 background is dead quiet, the CIEM's work well with that side of the pair, but not on the Taboo side. Well the Taboo is most certainly sensitive a sensitive instrument.
Check this out. I have the Taboo next to the CSP3, naturally. I plugged my CIEM into the Taboo, with the Taboo TURNED OFF. But the CSP3 was turned on. I could hear the background hum.... with the Taboo turned OFF. Weird. So I figure something is coming through the cables maybe? I disconnect the speaker wires, the RCA interconnect, event the power cable feeding the Taboo. Nothing hooked up to it. I turn the CSP3 on, plug my CIEM into the Taboo and guess what? Background hum. The same noise I'm hearing when the Taboo is on by itself. This is crazy. I pick the Taboo up and move it about two feet away and the noise stops. Something inside the Taboo is acting as an antenna and picking up "hum" from the transformer. Either the transformer of the CSP sitting beside it, or naturally it would pick up the hum from it's own parts as well. So this explains why it hums. Soooo...should I send it back again? Or does anyone have an idea of why this is happening and a possible fix? I feel that this info may be helpful in troubleshooting, that the hum is present when it's fully disconnected, turned off, but even SITS next to another amp! I LOVE this amp but this one thing bugs me and would like it not hum. Totally weird that it can be fully disconnected and have a background hum by just sitting next to another amp. Also anyone else with a CSP pre and a Taboo that has a little background hum, see if you can recreate this? TOTALLY WEIRD ...TABOO?
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