Well I can say that this little op-amp based unit may surprise people. The only drawback I can see is you must change batteries every 8 or 10 hrs of play. Comparing it too the Seduction then the Seduction is a better unit soundwise; but this little battery unit will sound much better than anything integrated into a reciever and better than many of the cheaper units like NAD. I haven't tried the newer better op-amps but if they do what the manufacturers claim then that should up the ante quite a bit. The sound is very smooth and mellow but good detail. Thats the best I can do description wise. If the Hag goes for 75$ then you nreed a power supply you are looking at what; about 125$? This can be assembled I would guess for maybe 80$.