Question about Fender Frontman 65R 65W 1x12 Guitar Combo Amplifier

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Generates buzzing noise even when only cable is connected to it. No cable - no noise.

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If you are saying that you are plugging a guitar cord into an input on an amp without the guitar on the other end and you are getting a hum or buzz with the volume turned up ; that is normal. If you are getting the same results with a guitar plugged in it means the ground wire to your output jack on your guitar is broken. Check your cord with a volt ohm meter for continuity on the tip on one end to the tip on the other end. Do this for the sleeve on one end to the other. If you were getting the buzz without a cable it would mean that your input jack in your amp has a broken ground connection. Hope this helps.

Posted on Jul 04, 2009

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Also make sure you are using an INSTRUMENT cable and NOT a speaker extension cable. The cable should be labelled for instrument use. Speaker cables are often cheaper but NOT shielded for instrument use resulting in hum and buzz.
Also the QUALITY of the instrument cables varies and some have poorer shielding.

Posted on Jul 26, 2009

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You have analyzed the problem... with the strings muted, the unit is quiet... that means the problem is with the guitar or cable picking up the noise. Move the guitar around near other things to search out the source which is probably magnetic fields... orient the guitar differently to sniff for the source. OFTEN lamp dimmers generate higher frequency components that can couple into the guitar pickups. The problem is fairly common.

You likely are in an area that has magnetic fields. Also you may have the settings on the amp that accentuates the noise. Eliminating this noise, especially at low levels, can be difficult if you have devices like flourescent lights that have magnetic ballasts.

You might also try running a different source into the amp such as a walkman player to verify the audio can be cleanly amplified. If that works, then the amp is OK.

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