These headphones are magic to the ears. Use a good quality speaker amp, tap into the speaker outs and sit back and enjoy. if your speaker amp puts more than 60-70 watts, then you will need a speaker impedance box ) a small price to pay for some of the best sound that money can buy. Better than the LCD-2 IMHO, and most all of the dynamic headphones available to us today. The impedance box looks like this:
and with the HE-6, you'll hear some of the some of the finest sound you'll ever hear.If you have a speaker amp, then you do no need the box. Read the reviews.
I have a pair of Dared Quasi mono-block 300B tube amps and I prefer it to my 100 w.p.c. Adcom independent amp, using the impedance box. Of course, if you have an amp
that is 100-250 w.p.c. then you must use the impedance box otherwise you'll overdrive the drivers in the Orthodynamics, and could do damage to then HE-6.
If it is too expensive for you, you can always buy the HE-300's which are the newest dynamic offering from Head-Direct for only $295 and I can say with all honestly that they blow away the Senn HD6XX, and the Beyer AKG-701's and the DT880 which are half the price and 2-3 times better. Only your ears can tell you which is better, but to my ears, it is a no brainer. The HE-300's are incredibly superior to it's competition, and cost a lot less.
You can always buy them and utilize the 30 refund offer, so you have nothing to lose except 1 way shipping, which arrive at your door 3-5 days from China after placing your order, I asked Fang if anyone was returning them, and he said "no".