LazyListener
500+ Head-Fier
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I typically don't listen at loud volumes, but when I tested the M4U1 at high volumes for short periods, I didn't notice any sibilance. Maybe not enough test tracks to notice. The M4U1 are a mids-focused can, so they may sound fatiguing after a while at high volume, but I never heard sibilance (sharp S's and T's).I don't think that the PSB M4U 1's are sibilant at average volumes, but at loud volumes, they do have a bit of sibilance and stridence for me and the sound starts to break up. This happens on my iPad too. Did you have this before? And you mention the Magni 2 makes the highs smoother. Do you think it'll smoothen out the highs to the point i don't have these issues
The Magni 2 may smooth out the sibilance on your M4U1. Only way to know is to try. But it could also make it worse. I was comparing with E10K, which by comparison, has thinner, less full sounding highs. This was with an HD 650. The Magni 2 is not a warm amp. I'd say neutral or slightly bright. With the HD 650, the highs were crisp, clear and smooth (not harsh or edgy). The 650 is a 300 Ohm can. I believe M4U1 is 32 Ohm. Sometimes, a powerful amp into a low ohm headphone can make the sound worse (brighter, harsher). It's all about getting a good sonic match between amp and headphone.
If you're trying to tame sibilance with an amp, you should probably be looking for amps with a warm sound signature, maybe a tube amp. But not necessarily. A smooth, neutralish amp could do the trick also. Like I said, only way to know is to try.
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