I’ve had it in my two-channel system only for about six weeks, so it’s still burning in. I think the short answer to what I love about it is depth, space, and detail.
The longer answer: I find it produces a massive, deep soundstage with enough space around the instruments to practically walk through. The imaging is clear and detailed without ever being edgy or uncomfortable to the ears.
The thing really is built like a tank, with no obvious cheap parts or hasty assembly.
Nothings is perfect, and there are two things I can mention about this amp, one I is general about high power and/or gear that involves tubes: It hisses. Not loud enough to hear from the couch, only from within 18” of the mids-tweeters. The other is that the motor that drives the volume knob from the remote creates a slight RF buzz through the speakers. Again, this cannot be heard form the listening spot, but it’s there none-the–less.
Also, the sound has benefited greatly from an AC cord upgrade.
In the process of finding an integrated I could live with, I took home a Music Hall Maven (receiver), Cambridge Audio Azure 740A, and a Krell KAV400xi and the Shanling which was measuable better in my system than all the others. I was actually hesitant to buy the it because of its physical size (it’s become the centerpiece of my living room). But in the end, I realized I was buying for sound.
I too was curious about the MF 3.5, but did not want to buy one used and unheard. I'm still curious about MF integrates.
I’ve noticed a lot of web sites list an A 300. I can’t figure out why, I suspect it might be some kind of gray market activity. The manufacturer as well as the retail shops sell A-3000’s, not A-300’s. I chose to buy mine from real people at a real store where I’ll be sure to get a real guarantee.
If anyone starts an A-3000 owners club, I’ll be the first member.
Two-channel system: Rotel RCD 1070 > Siltech New York ICs> Shanling a3000 integrated w/AQ NRG 2 power cord>DIY cat5 speaker cable> B&W 683 floorstanders. Dedicated AC outlet, room acoustic and vibration treatments involved.
I have photos and info on Audio Asylum also as Brett A.