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  1. rpgunn

    Older amps with modern headphones. Does the 1/8 impedance rule still apply ?

    My first post gets deleted due to linking to a site that belongs to a banned member. I had no idea, not a good start getting your first post deleted !   I'll try again...   I have read that headphones shouldn't be less than eight times the output impedance of the amplifiers phone jack...
  2. rpgunn

    older amps headphone jack impedance using new headphones - 1/8 rule ?

    I dont see many posts regarding this & I'm curious whether this should apply. Maybe those in the know can shed some light of on this.   /nwavguy.blogsp ot.com.au/2011/02/gain-and-headphone-ampsdacs.html   Non-Zero Output Impedance – Output impedance is one of the more common audible...
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