JaZZ
Headphoneus Supremus
Quote:
No, it's from the high sensitivity of the headphones. The «impedance mismatching» would work in favor of the headphone when it comes to the hiss (much higher impedance than speakers' usual ~8 ohm!), but the higher sensitivity makes upt for that.
Apart from the hiss problem it is uncritical to connect headphones directly to speaker outputs, provided that you're cautious with the volume control. Note that a speaker with an output of 30 watt at 8 ohm will output only ~1 watt at 300 ohm! If the hiss is unbearable, a voltage-dividing network as linked above would do the trick. Simple serial resistors aren't recommendable – they decrease the damping factor and at the same time provide much less attenuation than the voltage divider.
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| Originally Posted by Zombie_X /img/forum/go_quote.gif It varies from amp to amp. But it works very nicely if you can't afford a decent headphone amp. And this hiss is from impedance mismatching. |
No, it's from the high sensitivity of the headphones. The «impedance mismatching» would work in favor of the headphone when it comes to the hiss (much higher impedance than speakers' usual ~8 ohm!), but the higher sensitivity makes upt for that.
Apart from the hiss problem it is uncritical to connect headphones directly to speaker outputs, provided that you're cautious with the volume control. Note that a speaker with an output of 30 watt at 8 ohm will output only ~1 watt at 300 ohm! If the hiss is unbearable, a voltage-dividing network as linked above would do the trick. Simple serial resistors aren't recommendable – they decrease the damping factor and at the same time provide much less attenuation than the voltage divider.
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