dod sr460h

[electrictabs]

is there any schematic out there for this unit???
well here's the deal
it is a headphone amplifier with 6 channel splitter
i like the splitter but the amplifier is clipping way too early without giving enough volume.
so i want to keep the splitter,remove the amplifier and put another headphone amplifier in that place that will be clean and loud...
is there also any nice head amp schem out there for that situation???