Things that “blow your mind”

OK, I am signing off... I am going down to the dining hall, apparently there is a hack from Florida who thinks he is funny.  That's all my nursing home can afford (I think he is paying us)

I don't have any. If I come across as taking anything out on you, my bad. I was trying to be funny.

Acoustics simple experiments blew my mind...

Gear pieces dont blew mind, you can upgrade them all ...( i like my Sansui alpha but give me the money i will go higher even if it is a TOP vintage) 

A low cost well optimized system can blew your mind, it did for me...

My AKG K340 is the only gear piece that ever blew my mind when optimized ( with a long period of learning though). I generally dislike most headphones claustrophobic unnatural timbre with artificial soundstage with no deep bass, for example  a known reviewer  paired a sub to a Raal headphone etc   

1. DS 003 Optical Cartridge/my homebrew op amp based optical phono preamp

2. PS Audio Direcstream Sr. DAC - a 12 year old product that still smoke DAC’s coming out nowadays in the under $5k USD bracket

3.Final Audio Electrostatic Loudspeakers - A brand reborn doing electrostatics with state of the art tech that it’s competitors can even come close to...and they are half the price of what their competitors sell !!!