Fluttering Speaker

[rimtism123]

I'm hoping I can get some suggestions on how to resolve my problem..(yes I did a search)

I have an 8x10 cabinet and it seems when I play certain notes, the speakers flutter. Mostly when I play the 9th fret on my 4th string (drop C# tuning) and it sounds terrible. What can I do to fix this? Worn speakers? Bad electronics? Time for a new cab? Suggestions?

Cab: Carvin BR810 (seems like an older model, red tweeter)
Amp: Mesa M6 Carbine EQ'd:
Bass - 1 o'clock
Mid- 1 o'clock
Specialty Mid switch: Lowest
Treble- 3 o'clock

Basses used:
Mark Hoppus P-bass
CIJ '51 RI
Warwick Corvette STD Ash.

[billfitzmaurice]

Your cab may not go that low. It's likely tuned to 40-45Hz and you're putting tones through it that potentially will blow the drivers.

[chadds]

Lower your bass eq. Lower everything to get to the same tone. Less treble.

[craig.p]

The BR810 was rated down 3 dB at 58 Hz and down 10 dB at 38. Also, this is a vented cab, which behaves differently than a sealed cab does below cutoff. Cone hop (dance, flutter, whatever you want to call it) is a symptom of a subsonic problem. You have all the ingredients for one: drop tuning, bass boost, mid cut, vented cab. None alone would cause a problem but you have an aggregation effect going on, in my opinion, and that's what's doing it. I believe your simplest solution would be to put a subsonic filter in the amp's effects loop. Preferably, in view of the cab's cutoff point, a 60 Hz knee with an 18 dB/octave slope. The ideal solution, though, would be to sell the cab and get something that's more-suited to what you're looking for sound-wise, i.e. something with serious bottom-end extension. Acme comes to mind but there are others.

[rimtism123]

[quote=craig.p;9989448] I believe your simplest solution would be to put a subsonic filter in the amp's effects loop. Preferably, in view of the cab's cutoff point, a 60 Hz knee with an 18 dB/octave slope. QUOTE]

Alrighty...what do you suggest would do this job? Is it a pedal of some sort? Can anyone suggest a product (if applies?)

[craig.p]

Other than building it yourself, there are at least two ways you can go.

First option: buy a graphic EQ that has a built-in adjustable low-pass filter. Carvin has one but I'm not sure what the filter slope is. If it's 12 dB/octave, you might be able to squeak by with that. You can ask in their forums (what they call "community"), or maybe someone's already asked and gotten an answer. Or maybe it's in the manual if you want to download it.

Second option: get a custom stomp-box maker to build one for you. If you look around the effects forum, you should be able to get the names of these custom builders.