Hmm,
Some models of CD player, particularly from the 80's to early 90's.
Amplifiers, particularly from the 70's, but anything from better brands would be considered.
Reel to reel decks, particularly Teac, Revox, or Otari.
Teac or Tascam cassette decks.
Graphic equalisers.
Headphones, headphone amplifiers.
Cheers,
Jason.
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