The longest you have owned any gear?

A Niles Audio CPM-31 8x8 switchbay.  Simple magic. *G*

Next oldest is a SAE 2 band parametric eq....think it's the 180 (too lazy to go look at the label....plays daily in my shop....)

A Nagoka destat wand.  Little bugger will still bite your fingertip hard enough to make you nearly drop it.....

...there's some other 'oldies but goodies' underfoot around here....;)

Walker, Jadis, Avalon must be a great system. I presume power amps are also Jadis. Something I would want to hear. 

My Sonograph SG-3 turntable/Sumiko MMT, purchased in 1983. The original Portland, OR company.

NYAL Superphon preamp, ~1985 (?). In the closet, though.

jaybe, I believe you meant to say NYAL Super It pre-amp. Superphon was a brand.