i recently got the omega sound enhancer of ebay uk, more or less out of curiosity if it didnt cost me too much. (see my old post about buying amiga stuff cheap from foriegn countries)
its actually pretty kewl. its definitely not subtle... it will boost the bass and highs a lot --- not in the way that EQ'ing does though... its more of a LP/HP filter sounding thing.
if u turn it up to max, it will get real crunchy in the highs and make it sound sort of somewhere between an amiga and an atari 2600, but with a lot of high end. when u turn it to max it reminds me a lot of that old plugin Steinberg Spectralizer, except the sound enhancer also boosts some bass. it also does some strange limiting or something (audio seemed to limit around -4.1db when recording). when u turn it to around the 10-12 o'clock position is where it sounds best. if you see one cheap grab it, but i wouldn't pay too much for it.
below are 2 sound examples in flac, recorded direct in an echo mia soundcard via protracker, no normalization, channel merging, etc.
https://www.yousendit.com/download/cmcwUGhkbThreENGa1E9PQbypass = bypassed (no effect)
off = active at lowest setting (7 o'clock)
9.30 = active at ~9:30 o'clock
12 = active at ~12 o'clock
2.30 = active ~2:30 o'clock
max = active all the way up (5 o'clock)
as always, major props + shoutout to leirbag28 for giving me my first soundsampler, and for the replacement 600 mobo - can never thank u enuff, you rox!
http://www.amiga-hardware.com/showhardware.cgi?HARDID=1284