"Original" equipment vs. upgraded equipment

@grk regarding the difference between an ARC SE version that was the result of an upgrade from a non SE and one that was not. The latter while identical in circuit terms will contain some parts that are older than others and so will potentially age differently from a stock SE. Whether this difference is material or audible is questionable however it’s good to declare full provenance and provide all the paperwork.

• "One example would be an ARC Ref 75 being upgraded to a 75SE. Is the upgraded version inferior to an original 75SE?"
  

I owned the REF-75. Replaced the KT-120’s with the KT-150 for a nice upgrade. When ARC came out with the REF-75-SE I sold the REF-75 and bought a new REF-75-SE. The SE version has less grain, is more dynamic, is more three dimensional, and overall, is more organic and pleasurable to listen to. Definitely not a backward move.

I recently bought one of Grover’s upgraded Pioneer Elite DVD players to use as my main CD player. Upgraded caps and a beefier power supply. I didn’t A/B the unit, but the upgrades made for a totally killer CD player.

Thanks Grover. :-)

Frank

For me, I would not discount an upgraded unit from the manufacturer.
Sure, it may have some older parts, but I trust the manufacturer to know what needs replacing and what doesn't. If some people are so anal, then let them pay the premium price.
This is why I buy from Ayre, Atma-Sphere and McCormack. 
I never have to worry that my equipment will be obsolete. Far better than buying another new unit and eating the depreciation.
Bob

One example would be an ARC Ref 75 being upgraded to a 75SE. Is the upgraded version inferior to an original 75SE?

In this example I would say that though the upgraded unit may sound the same, the original 75SE will have greater resale value on the used market.

Why? Because in the upgrade process, only certain parts are being upgraded, not the whole amp. So if you are buying an upgraded used 75SE, 70% of your parts may be a couple/few years older than a used original 75SE.

Outside of that, there are qualified modifiers outside of original manufacturers. Folks like Steve McCormack, Chris Johnson, Bob Backert, Bill Thalmann, and others who perform modifications outside of the original manufacturer. Many of these certified modifiers products may idea sound better than the original. However, you will lose about 80 of your modification investment on resale.

Then there are other lesser qualified modifiers (all DIYers), whose work actually devalues the original product on the used market.

I don't want to sound like a crabby old fart, but precision in language counts!  Upgraded vs. original is not the same as modified vs. original when you are describing a unit for resale or determining what you think its value is.  At least to me, an upgrade is a change in the internals of a unit developed by (and in many cases done by) the manufacturer.  Like the Vandersteen 3 to 3A to 3A Sig or a VAC Ren 30/30 to a 30/30 Sig.  In my mind, the value of such units is increased as they are brought to more current designs and parts.  The value of modified units may or may not be better, based on who did them, how well they did them, etc.  While you won't get your investment back at resale, a unit modified by Dan Wright or SMc Audio will be more valuable than a stock unit.  OTOH, we've all heard (pun intended) of backyard butchers who return units in less than fully functional condition, if they return them at all.