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why did my Ampeg B115 fry?

Well the good news is that you could order an Eminence Beta 15a for $65-75 and get your cab sounding right again. But everyone's right that if you plan on using octaver and distortion (a combination I love, BTW), you need a big cab rig if you plan on being loud, and not using the 115e would be in your best interest.
 
I play fretless though an Ampeg svt 4 pro. The amp is split to separate low. To mid high and sends to an 18 sub and a 4 10 with a 3 way horn. I also use the Ampeg sub pedal which is from an svt 5. No problem with lots of headroom at big gigs

If that's what you want its a great lasting rig.

I see great deals all the time on eBay so if you are a good fisherman you will not drown in debt

Keep it live.
 
Hmmm 6x10 is starting to look appealing...
Don't fall victim to more marketing speak masquerading as truthful technical speak. It all depends on the 6x10. Some go low, some don't. BFM, Fearful or Barefaced are where it's at in this day and age.

Whatever rig you adopt you have to learn which note on the octave pedal gets you into the killzone. No rig can do bottom E octave below! A very few can do C below, I'm talking huge subwoofer rigs. Your 4x10 might play the octave below your D string if you have a real good'n. You should be eqing that range down anyway. Another reason speakers die.

It's not music down in the sub of sub range, what you really need is a filter in your effects loop for safety.
 
You need a crossover unit that works with the signal level of your effects loop. I'm not familiar with your amp. I've only worked with line level gear, where any reputable brand of crossover would be fine.

A pedal designed for bi amping might be what you need, kind of pricey, but cheaper than replacing speakers when you forget yourself in the heat of a gig.

You run your effects loop 100% signal and send the "high" channel out of the crossover back to the return. The highs being over 50 or 60 Hz depending how low your rig actually can play. This cuts out all the stuff that just makes your speakers flap uselessly.

Or you go out and buy a preamp and one of the newer digital power amps that has an adjustable high pass built in. Same same effect.

You say you never go so low as I was indicating. I think you fail to understand. Each octave below halves the frequency. If you play a C on your A string the octave filter generates the fundamental of the low C on the B string, lots of it too. That's brutally punishing on speakers that haven't been EQ treated or crossed out of it. As you found out.
 
You need a crossover unit that works with the signal level of your effects loop. I'm not familiar with your amp. I've only worked with line level gear, where any reputable brand of crossover would be fine.

A pedal designed for bi amping might be what you need, kind of pricey, but cheaper than replacing speakers when you forget yourself in the heat of a gig.

You run your effects loop 100% signal and send the "high" channel out of the crossover back to the return. The highs being over 50 or 60 Hz depending how low your rig actually can play. This cuts out all the stuff that just makes your speakers flap uselessly.

Or you go out and buy a preamp and one of the newer digital power amps that has an adjustable high pass built in. Same same effect.

You say you never go so low as I was indicating. I think you fail to understand. Each octave below halves the frequency. If you play a C on your A string the octave filter generates the fundamental of the low C on the B string, lots of it too. That's brutally punishing on speakers that haven't been EQ treated or crossed out of it. As you found out.


+1
 

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