OBC115 - Farting at moderate volume?

[negativefx]

Hi everyone,

I have an OBC115 and an OBC410. I think I'm having issues with the 15. I've hooked it up to a Terror Bass 1000, an AD200B, and a Fender Super Bassman. In all three cases, I get major farting at low (ie 3 of 10) volumes. This happens when I have it hooked up by itself or in combo with the 410. I pulled the grill off and gently checked the seams and they all seem to be in tact. Is this expected behavior for this cab? It sounds like some jerks car trunk filled with subs and no insulation. Joking aside, it doesn't sound like the cab is rattling... it sounds like a driver when they get a tear. I've not pulled it apart to check for the actual driver loaded in it. If it makes a difference (which I find hard to believe), I stack it on top the 410 rather than underneath.

For a point of reference, I have a Fender BXR100 (15" in the combo) and I've never had it make anywhere near this noise. Granted it's only 100 SS watts, but I've never had the rattle I do from this OBC115. I can try to get a sound clip but I don't have a bass mic... only an SM57 for vocals.

Thanks!

 

[CL400Peavey]

Quite simply you are pushing the 115 past its mechanical limitations. Either turn down, change up your eq, or ditch the 115 for another 410. IF you continue to run the 115 and the 410, put the 115 on top so you can hear when its hitting its limits. This will prevent you from blowing it.

 

[negativefx]

Ok thanks for the response. I can understand hitting the limit through the tb1000 but how is the AD200 pushing it so hard when it's only 200w and the cab is rated for 400?

 

[mbelue]

Ok thanks for the response. I can understand hitting the limit through the tb1000 but how is the AD200 pushing it so hard when it's only 200w and the cab is rated for 400?

A cabs rating has nothing to do with when it will fart. That rating is when it will melt. Catastrophic failure. Sound performance drops prior to this.

 

[negativefx]

I had no idea. I though 400 rms meant it would take a 200w cab no problem. Should I expect better performance if I swap a kappa 3015lf in there?

 

[CL400Peavey]

I had no idea. I though 400 rms meant it would take a 200w cab no problem. Should I expect better performance if I swap a kappa 3015lf in there?

Nope. The cab isnt meant to run that driver, and it should not be run full range.

 

[Downunderwonder]

Hold up a bit.

Ad200 on "3" I doubt would be farting out a 3015 unless you're being silly about the eq.

Check out the driver.

 

[Happy Face]

Ok thanks for the response. I can understand hitting the limit through the tb1000 but how is the AD200 pushing it so hard when it's only 200w and the cab is rated for 400?

Agreed with the Downunderwonder. Speaking from experience, there's no way a 200 watt amp should be stressing out that cab. As our antipodean friend says, check out the speaker. Something is very wrong there.

Did you buy it new? If not, I wonder if some candyass put a neo into it?

 

[mbelue]

Hold up a bit.

Ad200 on "3" I doubt would be farting out a 3015 unless you're being silly about the eq.

Check out the driver.

I don't think that driver is in the cab yet I believe it is still stock.
Either way the 3015lf isn't meant to be run alone.

 

[CL400Peavey]

I don't think that driver is in the cab yet I believe it is still stock.
Either way the 3015lf isn't meant to be run alone.

+1

or even run with out some sort of LPF.

 

[Downunderwonder]

According Orange it's a Kappa which is no slouch. Probably it got busted while using the Terror and 4x10 together.

Regarding 3015LF, it's a subwoofer, no good for full range bass.

 

[Downunderwonder]

You can use your SM57 on bass. It doesn't pick up the lowest frequencies well but it's fine for giving us a listen, hell, people use them for live cab mic'ing all the time.

 

[Rick James]

The cheap Kappa 15 that's stock will fart out with as little as 100 watts. The 3015 (not LF) will take 300.

 

[hdracer]

The 3015 non LF works real good in that box.
Put some lining inside while you have it apart. It helps a lot.

 

[Rick James]

Put some lining inside while you have it apart. It helps a lot.

They left that out too?

 

[negativefx]

I bought it new online from one of the lesser respected big box merchants. Box showed up without any damage and there wasn't a scratch on the cab.

On the AD200B specifically, I am running something like bass at 10/10, mids at 6, treble at 8. It's a passive EQ so my understanding is the dimed bass is OK. Same with the vintage channel on the Fender and the TB1000 at around 7/4/6.

I'll try to grab a sound clip later tonight if I have time.

If I do end up swapping the speaker, what kind of lining should I use?

 

[NWB]

That sounds like way too much low-end for the cab. Seems like a classic case of overexcursion.

 

[hdracer]

They left that out too?

Yes they did.
If I hadn't got it used at a great price I would have been mad.
For what they charge for that cab it's a rip off.
$75 speaker, no lining and tolex so thin it rips and tears easily.
The box is built well but it has skids and doesn't always sit right on a uneven floor.
I can't wait for my Dually to be built so I can put the stock speaker back in it and sell it.

 

[rpsands]

Replacing it with a 15PR400 would be likely more akin to the original woofer's tone. That said, I'd return it while you can since that cab is garbage despite sounding good - it weighs a ton, the woofer's junk, and the tolex as mentioned is really weak sauce.

 

[Happy Face]

Wow. I run two stock OBC115s with an AD 200 or a Bass Terror 500. Never heard a hint of farting.

But then, I don't dime the bass tone or the crank volume ultra high (maybe it's at 11 o'clock on the 200) since we have our own FOH or use ones the venues provide. So my experience may not apply.

Good luck!