Originally Posted by dario
How would compare this amp against a dedicated headphone amplifier?
I have the Hd650...
I find the Yaqin MS-6V6 to be clearly superior to the LD MKIVse (and LD2++...) which I find too thin sounding and lacking deep bass. If you don't need an amp to drive speakers, it might be a better option to invest your 400-500$ in a dedicated HP amplifier like the Darkvoice 3322/ Audiotailor Jade.
But OTOH If you need an amp capable of driving speakers and headphones and which has multiple inputs (forget about the remote control, it's not made for headphones listenning), I think the MS-6V6 is a very good amp for the 525$ I paid. It's a fun amp with the HD650, It's tubby sounding, (ie. sound is full, warm, round, smooth and sweet) and the extension is better than on the LD MKIVse at both ends. It responds well to tube rolling, but since the sound signature is a bit dark, it will not sound good with the smoothest tubes. Another good thing is that you can buy an infinite variety of 12AU7/12AT7 and the good NOS 6V6 tube are still affordable.
Even thought the bass is present, it is a bit round and slow for my taste and could be tighter, heavier and go deeper. Overall the sound could be more dynamic and clearer, but still, I continously enjoy listenning to this amp with my HD650.