Cowboys in my IB?

**Chrisbee** · **11-22-06, 11:08 AM**

Hi again

I was plumbing the depths with my IB today using REW's "Frequency follows cursor".

I reached 90dB @ 10Hz @ 9 feet and there was a background sound of galloping horses from my IB. A deep hollow sound like somebody beating a cardboard box in short cycles with a space in between. :holycow:

With less than 1/4" of cone movement at the time this suggests to me that the "cowboy" artifacts came from within REW. Or perhaps the electronics chain? Rather than caused by a mechanical problem. Had the drivers been hitting the endstops I think I would have heard a continuous rattle.

REW's input barograph from the SPL meter was going up and down like the water in a U-tube!

At 15Hz the galloping horses had slowed to a canter.

Any thoughts?

Thanks

**brucek** · **11-22-06, 12:08 PM**

cowboys.jpg

**Chrisbee** · **11-22-06, 12:12 PM**

**titch--** · **11-30-06, 04:14 PM**

**Sonnie** · **11-30-06, 09:29 PM**

**drf** · **12-01-06, 02:05 AM**

As Colonel Custers would say:

"well it's an IB, how many indians could there be in there?"

His last words could have been:

"****** harmonic distortion!!!"

**Chrisbee** · **12-01-06, 03:02 AM**

This sounds serious!

Should I call the sheriff!

Or a mechanic?

Could my big ends be shot?

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