Your single favorite component


Of all the pieces of your system you now own or have owned in the past, is there any one piece you could say is your absolute favorite piece of equipment? 

I don't know if I have an answer to my own question - I enjoy various pieces of equipment for different reasons. A turntable I've owned for 18 years, a 40 year old tuner, an amp I built myself, all in some way are pretty special to me. And so on! 
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New to the A-Gon' but appreciate reading everyones blog posts.  Ive been enjoying my little David Berning tube MicroZOTL HPA!  Is fantastic
It is a 1950's Valvo Cca 6922 Pinched Waist I acquired a couple of years ago.  It is in a (now antique) Audio Research LS2B MKII remote preamp.  Has long ago been a tube roller (roll em in and roll em out) to get to Grey Plate Cca 6922 Siemens & Halske  as the dream of the crop for this pre....   so far removed from that OE Chinese drek....  but this again moved performance to a whole other level.  Just add a finned tube cooler modded with a drain wire to ground to kill some additional RF and there you go.
and on second thought I have lots of favorite components. I really like my modded Acoustat 1100 speakers and the two Sumo Andromeda IIA's that drive them bi-wired on custom cable.  Not to miss the crowd is a Radio X modified Sansui tuner and Magnum Dynalab Signal Sleuth and half mast whip.  Sony SACD which is killa on red book rounds out the list... 
PrimaLuna Dialogue HP Integrated Amp.  No contest.  This thing changed everything.
I've had many but my current "love" is a newly acquired Esoteric SA-50 CD/SACD player.