So I just received my 4420. This is the second amp I ever owned. First being the emo xpa-3. I unpacked it and hooked it up to the pio 21txh.
I been listening to both amps back and forth for the past 2 hours with my favorite demo music.
The emo is definately louder, I find myself turning the pio up after switching amps. But the b&k is easier to listen to. The emo is harsher and bothers my ears after a few songs. The b&k is soothing compared to the emo..
Emo produces more pronounced bass and crisper treble. But the b&k sounds more realistic.
I do understand the xpa3 is made for home theater and not 2 channel audio. I can see how it excels at that being forward and louder.
To Be Continued......