Headroom maxed out Home headphone amp in excellent condition.
From a Google search:
Measuring 13.5" D -- incl. volume control knob and RCA jacks -- x 6.75" W x 2.4" H, the Maxed-Out Home (MOH) is housed in a solid and seamless extrusion with lengthwise decor striations and 1/16th front and back plates.
From left to right, the front sports two Swiss Neutrik 1/4" jacks, one 3-position "Filter" toggle (top "brighter", middle "off", bottom "bright), one 2-position on/off for "process" and another 3-position jobbie for "gain (hi/lo/medium from top to bottom).
Next are a continuous-motion volume control with white index marker and a red LED power indicator. In toto, superb functionality and confidence-inspiring parts, no fluff or excess.
The same no-nonsense theme continues aft where we find the power module with three-prong IEC, on/off rocker switch and fuse holder; a chassis ground lift toggle; and three pairs of high-quality Cardas RCAs, the first two inputs 2 and 1 -- with a two-position toggle between to select either -- and one pair of outputs. These latter jacks clearly suggests that MOH is intended for regular preamp duty. That's a handy-dandy feature if you abhor box redundancy, don't have more than two sources and don't insist on remote control.
The variable gain settings optimize different loads by maximizing useful volume increments. "Process" activates HeadRoom's proprietary crossfeed circuit that bleeds low amounts of opposite channel data to each ear. Unlike with speakers, headphone listening isolates each ear from the other. Our hardwired binaural hearing mechanism -- assigning three-dimensional positioning via the time arrival differential of the same data perceived first by the closer, then the farther ear -- is disabled. HeadRoom's algorithm attempts to restore some of it to soften the concomitant hard panning (left ear/center of the head/right ear) that many headphone listeners find objectionable or unnatural.