Question about Line 6 Spider Iii 15 Modeling Guitar Amplifier 15 Watt
My Line6 spider 3 has a loud humming to it and when I hook up my guitar no strings can be heard. Whats the problem?
Posted by Anonymous on
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Posted on Jan 02, 2017
The frequency of the A string when in tune is 110Hz.
What you are hearing is actually 120Hz which is the second harmonic of the 60Hz power frequency. It would be hard for you to distinguish between 110 an 120.
Try this test: Bring something that produces a reasonable magnetic field such as a wall wart power adapter that is powered near your pickup... Then you will be able to see that you are picking up stray magnetic fields from your environment.
Humbucker pickups attempt to quash such pickup by winding the pickup so stray magnetic fields cancel in adjacent coils.
Some pickup CAN occur on your cord and also in an amp.
If you leave your cable unplugged from teh guitar you are LIKELY to pick up some of this hum... The second harmonic pickup is COMMON when devces like full wave rectifiers are driven by transformers in the area.
Posted on Feb 24, 2010
There is likely a switch contact on the headphone jack that routes the amp output to the speaker. These jacks on most music stuff are JUNK and the contact may not be closing.
If the spring contact is bent so it won't close you can bend it to contact BUT the springyness usually is gone and the contact will be marginal.
Posted on May 10, 2010
This will be close... they beef up the power amp portion but preamp and most of the rest will be the same:
Posted on Jan 14, 2011
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