The Home Module
This little Class-A blue module contains all the electronics basic to a HeadRoom Desktop Amp. In the 'Home' electronics module, there are two 4-layer circuit boards (one each for the left & right channel) that are connected with a series of header pins used to solder the module to the main circuit board. The Home module is designed to sound phenomenal without going up the ridiculously steep part of the diminishing returns curve. The output buffer stage is our own HeadRoom-adapted version of the highly-regarded Diamond Buffer discrete transistor design by Walter Jung. The internal input buffer, crossfeed, summing, and gain stages use the excellent-sounding, tonally accurate, and smoothly detailed soundscape provided by Burr-Brown OPA2134 op-amp. All these active circuits are forced thoroughly into "Class-A” performance bias with constant-current sources. Resistors are 1% metal thin film, and caps in the signal chain are high-end polyphenylenesulfide (poly film). The sound signature of this module is not only extremely well-balanced, richly detailed, and smoothly punchy, but also liquid-clear and fully integrated throughout the entire frequency spectrum. It's simply a sweet & organic audiophile listening experience.
FYi~ All HeadRoom Home Amp, Home Balanced Amp, and HeadRoom Ultra Desktop Amps now come "stock" with our top-level 'Max' electronics module. The Max module remains a very complex 'hold-your-breath' type of tech maneuver and is executed with exceedingly painstaking care utilizing crazy-expensive audio parts -- which is why only those with the trickest of audio gear and pristine ears should bother as those 'Max' module babies are pricey almost beyond all reason; Most listeners should just lay back and enjoy the lovely sound of getting it right between your ears in this less spendy 'Home' electronics module. That being said, however, our top-level 'Max' electronics module is the ultimate headphone amp performance upgrade/installation and will easily allow one to discern the subtle sonic differences between a $3,000 and $10,000 reference CD player.