Best bang for the buck


What’s been the most cost effective item you purchased for your system? 
I will go first- a Zerostat I bought 40 years ago. Next most cost effective purchase has to be a Denon DL103R cartridge which I bought new for $300. 

zavato

Yamaha NS-5000. You could spend ten times the money and never match the driver technology. 

The yamaha ns 5000 has yamahas version of textreme wich is just under beryllium for modulas and stiffness. Pushes cone distortion beyond hearing frequency. I want to hear it some day but until then I'll listen to my old 1000 with beryllium mid ,tweet .enjoy the music

Ran my ethernet cable through a fiber optic conversion and back to ethernet.  For $186 including a low noise power supply for the clean end.  Unbelievable improvement with respect to the noised floor. 

2 TP-Link Gigabit SFP Modules

2 TP-Link MC220L Media Converters

1 Cable Matters Plenum Rated Duplex OS2 Single Mode Fiber Optic Patch Cable

1 Cable Matters 1 ft. Cat 5 Ethernet Cable

1 iFi SilentPower iPower2 Low Noise DC Power Supply