rocky1313
Even though passives are my game, I don’t believe ANY active preamp can better a "properly used" passive for transparency, dynamics, uncoloured sound and extension in both the highs and lows.
Saying that though your AR LS7 is "worth" far more to sell than any passive is (except for one) worth, regardless of which one.
The one I’m talking about is the $20k D’artZeel NHB-18NS as it also uses the same LED/LDR passive system as the one I make does.
Cheers George