Things that “blow your mind”

@thecarpathian I can't reply to messages. No worries, we are good. You are the last person I would want to annoy.

Some of the advice and/or opinions offered on this forum.

A Dual turntable can play upside down.

A Pioneer Spec 2 amp (in its factory carton) can fall out of our delivery vehicle at 40MPH, take a few tumbles and still play.  For years.

An $80,000 pair of speakers can actually sound like #%&*!!

"Everybody knows" that CDs are clean and concentric when they leave the factory. They are neither clean nor concentric.

Bose has not yet created a "Mac" version of the 901s.

The first time I listened to an all Quad system.  And it produced...music.  Those ugly old speakers could float an image like nothing else.

Save for my acoustics experiments which really blew my mind...

Save for my AKG K340 which hybrid design blew my mind ...

 Here another set of experiments linked to gear optimization that blew my mind in my actual near field listening from my acoustically controlled room corner : 

I lived through 6 huge improvement since beginning to drive my audio system battery dac SPS NOS Philips TDA 1543 from my computer USB :

1: using  linear power supplies (old vintage sino-Ameican one at low cost ) ...
2 : Using filter station with a buffer station device from Aliexpress at few peanuts costs ...
3: Using a DDC Douk U2 pro Xmos Xu 316  (low cost )
4: Using a Jack isoub isolator from aliexpress powered by a battery bank (low cost) 
5: using low cost Schuman battery generator on the dac and and on my others filters+buffer stations for my pre-amp and for the one driving the dac too...Even some on my 2 linear power supply... Peanuts cost for each devices...
6: homemade grounding boxes for my devices ( almost no cost save for the minerals)

My low cost system slightly over 1000 bucks in near field listening makes me smile and laugh at possible upgrade because of the greater amount of money necessary now to really beat a 1,200 bucks audio system optimized ...

I listen music no more the sound quality ...

 I can say that there is no relation between a system/room qualitative experience  before mechanical,electrical and acoustical optimization and after this process... No relation. Period. Then before upgrading anything if your system pieces are minimally synergetical together optimize the system and the room.

Upgrade  urge is a placebo effect for acoustics ignorance half the time ...Think about this before throwing money to erase frustration ...

I could upgrade my system/room, but anyway i dont have the new room to go with bigger speakers, and i dont want to because i dont need to to enjoy very good S.Q. 

And upgrading my optimized  AKG K340 is nearly impossible at any cost... Perhaps the Sennheiser orpheus ? Cost minimum 50,000 USD .... 

I exclude the My-sphere and the Raal which lack deep bass...I already had an "out of the head" sound experience and speaker like sound with the K340...

I learned also in audio that the best for me is not what is the better for everyone else...