[sdiy] Tube amplifier question

[Antti Huovilainen]

On Thu, 5 Aug 2004 jhaible at debitel.net wrote:

> I even wonder about the *optimal* output impedance.
> Often when phones are connected to power amps, there's
> just a series resistor ar not-so-low-impedance

I remember reading that headphones are designed to be driven from 120 ohm 
impedance. Can't remember where I read that tho. If this is true, it 
should make designing OTL headphone amp easier. You could just run the amp 
output to 1k/150 ohm voltage divider.

Antti

Give a man a fire, and he'll be warm that day,
Set him alight and he'll be warm for the rest of his life