crackling noise at high volume


and its not my Rice Crispies ... when I turn it up to 1pm on my Bryston B60, feeding my Totem Arros, it breaks up. This is pretty much the highest volume/decibel level I could possibly push this system to. WHen its medium loud, no problems.

Any ideas who is at fault here?
sandman012

Showing 3 responses by ghosthouse

Sandman -
From the mftrs' web sites:
Bryston B60 rated at 100 wpc @ 4 ohms.
Totem Arro 4 ohm, 87 db sensitivity, 80 watt max. program

Does seem like you could be overdriving them.
Eldartford - Can clipping occur even when the amp's rated power output exceeds the max program rating of the speaker? I thought clipping occurred when the amp "ran out of power" and sent a damaging "flat top" sine wave signal to the speakers. Seems like clipping would be more likely where the amp was "underpowered" relative to the speaker it was driving. Happy to be enlighted on this point if I'm in error.

Sandman 012 - I've used Peter Gabriel's "So" CD and its next to last track (We Do What We're Told) as a helpful diagnostic for a blown tweeter. The opening has some high frequency stuff that will cause a "buzzing" distortion from a damaged tweeter. Need to get your ear in line and close to the tweeter perhaps - but if the tweeter is bad it will be noticeable at moderate sound levels. If you have this CD, worth checking...might relieve some concerns for you if the track plays on your system without breaking up.
OK, Eldarrford, Thanks for the input...amp power rating greater than speaker program rating doesn't eliminate the possibility of being able to drive the amp into clipping.