Originally Posted by Hot Grits
the A5-350 are the only ones with amp issues that I know of.
Like was said, I think the A5-350 owners are the more vocal ones because of the in-between area the sub is in.
People with the LT1300 amp probably have more headroom than they know what to do with, but from what was said, it seems all the LT amps have the same protection type of protection at the output stage once the amp runs out of headroom.
Has anyone with an A3-300 gotten their amp into protection? I don't know... maybe they haven't tried WOTW pods emerge scene at 0MV on their AVR's, which might be because they weren't expecting it to go that loud. Maybe they have played the scene with no problem at 0MV, which might be because that amp operates with less headroom and the driver requires less power, but they never get to the output level of the A5-350 using the headroom at lower MV. I don't know.
One thing that seems true is that the A5-350 likes power, and the way they have it set up delivers a lot at lower volume levels with a great dynamic range. Perhaps though, the 550W is teetering on what would be required to get to the volumes some are expecting with the headroom we like. Some seem like they might prefer some limiting, with a bit less headroom to make sure that they can reach those volumes without worrying about protection. Perhaps an amp with a bit more wattage (LT1300 would be too much) like an LT750 would do the trick, allowing to get to those volumes AND keep the headroom. I don't know.
One reason I keep wondering about this subsonic filter is that the protection mode keeps occuring on scenes with really low extension. I can't wait to get the in-line Fmod filters in so I can test this, but either way, it would seem to me that if eD would continue to make unregulated amps (which I think is very cool- putting some more power in your hands) the inclusion of a subsonic filter would make sense in fall in line with their goal to cater to the enthusiast crowd that wants to have more control over their setup.