The picture to the left, show,s my 2505- C-34 and 206. All of which are used in one way or another to drive headphones. The 2505 drives the Signet electro-static headphones. The C-34 monitor amp drives one set of Stax electret headphones. The C-34 and 2505 drive dynamic headphones via the front panel headphone jacks. The 206 drives a lambda Stax headphone with 2 channels. The other 4 channels drive remote speaker pairs. The two 207's tri amp the front speakers - bi amp the center and rear speakers and drive the side speakers.