Re: Spider III 30 Watt loud noise when guitar cable is plugged in.

support@line6.com — Tue, 11 Dec 2012 04:05:48 GMT

Not a guitar amp expert but let me suggest the following. Generally it's pretty abusive to plug an instrument into a powered amplifier. I believe it has to do with the retaliation characteristics of the input stage but someone more expert regarding input stages of these amplifiers might know better. You might consider simply installing your cable into your guitar followed by installing the plug into the amplifier followed by powering up your amplifier.

Spider III 30 Noise

support@line6.com — Sun, 09 Dec 2012 15:45:40 GMT

New to the forum and a newbie with amplifiers (older acoustic guitar player). Noise (hum) from amplifier after powered up. My son (14) acquired a Line 6 Spider III 30 (SN 21A851P5749xxxxxx) and a Harmony Guitar. I R&R'd the plug, potentiometers, switch, capacitor, and wiring in guitar (I have some electronics experience and original hardware was junk - replace with switchcraft and WD) and set up guitar to factory specs. When we turn on the amplifier with the guitar plugged in:

-noise (hum) until I move channel volume switch (up or down) or hold Tap delay and rotate past 12 o'clock

-noise (hum) when switch from "clean" to other setting (crunch, metal, insane) until I move the channel volume switch (up or down)

Note, I do note a small bump when I turn on the amp and a significant bump when I turn off followed by a second bump after the "switch off" bump.

Don't know what is normal and don't have a wiring diagram for the amp to troubleshoot the noise (hum) easily. Any help would be appreciated.

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Re: Spider III 30 Watt loud noise when guitar cable is plugged in.

Spider III 30 Noise