I seldom turn my G-DEC 3 THIRTY over 3 on the volume control and I use clean settings with a little slapback echo and a touch of reverb. The guitar I use mostly with it is a 2008 Gretsch 6120DSV with Dyna'Sonic single coil pickups.

When I set the bass tone control on the amp, I usually use the clean blackface setting, up past 8 and hit a Bb or lower note on the 6th string (.046) it sounds like the speaker is blown and and the sound flutters badly and loudly.

I'm 64 years old and don't play out and I've had the amp about 9 months and I noticed this problem early on but it was minor and now it is getting much worse.

Has anybody else had this problem and if you got it fixed, how was it rectified?

If it's still under warranty, it may be a good time to exercise the warranty. Fender has a great 5 yr warranty.

Welcome to the forum!
Fender replaced mine. They didn't even bother to repair it.
I would try setting the effects on "None" and trying it out, or if you have access to another speaker cabinet, try that.

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Life...... It's sexually transmitted and always fatal

Thanks, but I think I fixed my own problem. I really didn't know what the Timbre controls were for so I did a little experimentation and found that when I had the bass turned up I also had bass boost on the timbre control and it was overdriving the speaker. With a few tweaks of the controls I think I solved my problem.

That's great! I usually turn off all that stuff because it always seems to cause me grief in one way or another. I'd be too tempted to get a nice Bassman for that 6120. Very cool guitar.

Don't be a stranger, there's a few of us geezers on the forum.

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Life...... It's sexually transmitted and always fatal

Do you play a Gretsch too? I've had a number of them over the years but the 6120DSV I have now is really something special. They guys who made mine that day were having a good day. I've never played another like it.

I also have a Stratocaster clone that I like a lot and an Ibanez Artcore that I've modded the heck out of. It has a set of vintage dogear P90s on it that are just awesome.

I've played a few over the years. Really nice guitars. I have been looking at the 6120 for some time now. This is my slow season, so I watch my spending a little.

I have a few oddballs. I have an Ibanez Artcore AS73 with SD Phat Cat P90's in it. It really sings. I also have a 63 Supro Martinique, 72 Strat and a 58 Dano U1 that I have a lot of fun with. I've sold a lot of my stuff during my "rough times" that I wish I still had.

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Life...... It's sexually transmitted and always fatal