Steve,
Look closely - that is the *power* that can be developed by the
amplifier. Certainly a higher impedance load will reduce the power
available from the amplifier, but the output voltage will be higher and
the current requirement is lower.
Most headphones (other than some audiophile types) do not require much
power at all.
73,
Don W3FPR
On 12/28/2015 1:59 PM, Steve Ellington wrote:
K3 uses the.
LM4811 Headphone Amplifier
Texas Instruments Specs for output Z
RL = 16Ω 105 mW
RL = 32Ω 70 mW
At 60 ohms the output power drops to 20 mw. Per their graphs.
300 ohms is not even considered.
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