Axiom Home Page Forums General Discussion Home Theater Iron Man 2 Blu-ray

How would you describe those noises you were getting from the EP175 CatBrat?

I think I was overdriving the speaker. The noise is hard to describe now by memory, but it was a distorted mess of a sound is all I can remember. Sort of a farting noise, I guess.

Edit: In your case, it sounds like it's isolated to one driver. I would try and isolate which one it is and try to get a replacement for it.

That is some excellent troubleshooting advice CatBrat. If the OP can isolate it to a specific driver(s) they very well could have been damaged during those scenes. With the system turned off, you can do a quick check by gently and carefully pressing the cone in and if you feel any resistance and/or hear "scraping" like sounds, that driver would need to be replaced.

Iron man 1 was a great workout for my ep500 so I assume it would put an m80 to the test

I would try to isolate the noise down to exactly which driver in the M80, if it is only one driver and not all of them. If it is all of them, it could be you are hearing distortion due to underpowering the speakers. That scene in Iron Man is very demanding and at loud volume levels an avr could easily be driven to distortion.

I once played Dark Night without my sub (M80's full range) and even my A1400 was experiencing difficulties. LFE channels without subs are getting increasingly problematic.

I’m not sure how it could happen but I was getting distortion from the 5.25” driver on one of my M2s at higher volumes on certain material. By troubleshooting I was able to narrow it down to the crossover. Axiom sent me a new crossover and problem solved.

Thanks. I will try pushing in the drivers tonight to see if I hear something. However, if the driver would be defective, wouldn't I hear this more often in music or movies rather than just these 2 specific scenes?

Not necessarily. I had a loose dust cap on an M22 driver that only rattled on specific notes on one song. The bad crossover I mentioned above only happened at reference level SPLs during specific music being played in Mass Effect. In both cased replacing the defective part solved the problem.

Ok, so I tried pushing in the drivers and didn't notice nothing unusual. This weekend I will try to listen to this scene again putting my ear to each of the woofers to see if I can determine which one it comes from. Is it correct to say that if it comes from all drivers, it is my AVR that is not powerful enough, if it come from only one driver, there is a problem with one of the components? Is there something else I can try?
Dean, how did you determine it was the crossover and not the driver?