System phenomenon when playing loud
This can happen very much so if the xover in the speakers are using iron core instead of air core inductors, they are cheaper but can saturate at high power and cause compressive effect of the dynamics, same goes for the driver voice coils when they get hot. BTW: your amps JC1's are fine, they are not the problem. Cheers George |
Mike and George, thank you! Excellent thoughts. I don’t think it’s the room, but the room is about 15’ wide (speakers are along that wall) by 25’ deep, 9’ ceiling. No treatments on the walls (yet), outside of normal pictures and other furniture. It’s important to note that this high frequency suck-out happens in an instant. Not gradual at all. And it happens in both channels simultaneously. Thanks for asking that question! This leads me to believe that the problem may lay in the preamp or, as George mentioned, the speakers’ crossovers. I would have never thought of the possibility of iron core inductors getting saturated. Thanks George! In any case, I’m having a wonderful time testing the outer limits of this phenomenon. It seems that, at least in this early exploration, that this happens, once, when the system has been running, at a good substantial volume (82 on the Line 1, and I do know this is an arbitrary, subjective number, given all the components) for a longer period (about 2 hours at least this evening), the phenomenon isn’t reoccurring. Spoke too soon, just happened again. It occurs in both channels simultaneously, I think it’s got to be the preamp or the inductors, not the amps, given that they are mono blocks. dare I start digging into the Triangle’s crossovers? Not tonight. Too many tunes to listen too! thanks Dudes! Dave |
Looks like they are not opposed to using iron core chokes to save some money. These could saturate when "cranked up loud" as you put it. http://www.hifishock.org/galleries/speakers/triangle/_cache/altea-esw-2-triangle-280x196.jpg http://www.hifishock.org/galleries/speakers/triangle/antal-ex-2-triangle.jpg http://www.hifishock.org/galleries/speakers/triangle/altea-ex-2-triangle.jpg If they were mine and I experienced the same problem, I would replace them with air core chokes of the same inductance and impedance, if you can find the same, you can get something a bit higher in inductance that’s close to the same impedance and de-wind it down to the right inductance. I did the same with some Yamaha NS-1000X or was it B&W801? long time ago, and the difference was very noticeable for the better when "cranked" up loud Cheers George |
Much thanks, George! I’m imagining that the hard part will be determining the value of the inductors. Unfortunately, in my experience, they don’t often have a handy label on them when factory installed. Last night as I played with volume levels, I could find the point where the phenomenon occurred, back off a bit, bring the volume back up, etc. I discovered that the phenomenon did have a fade in/out, not quite the “flipped switch” I described earlier. But the fade was very quick, just as I’m imagining the saturation effect might be. Much thanks guys! Dave |
