Driving requirement of a typical ear phone of small walkman or IPOT

  • Thread starter yungman
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In summary, the conversation discusses creating a simple battery amplifier circuit to amplify a guitar signal for use with headphones during workouts or walking. The typical input impedance for most headphones is either 600 ohms for high impedance or 30-100 ohms for low impedance. Cheap headphones tend to have lower impedance. It is suggested that a common op-amp may not be enough to drive the headphones.
  • #1
yungman
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I want to make a quick and simplest little battery amplifier circuit to amplifier the guitar to drive a headphone of a walkman or IPOT type where people wear to do workout or walking. What is the typical input impedance and input voltage.

I don't need high quality sound, just amplifier the signal of about 1mV to 2mV. Can I typical op-amp be used?

Thanks
 
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  • #2
Most headphones are one of two types.

"High impedance" phones have a standard impedance of 600 ohms. "Low impedance" phones are usually around 50 ohms, but could be anything between say 30 and 100.

Cheap headphones tend to be low impedance, because they "sound louder" driven from the same voltage level.
 
  • #3
Thanks for the reply. Sounds like I need more than a common op-amp to drive it.
 

1. How do earphones for small walkmans or iPods vary from regular earphones?

Earphones for small walkmans or iPods typically have smaller drivers and lower impedance levels to match the power output of these devices. They also tend to have shorter cords for convenience.

2. What is the typical driving requirement for earphones of small walkmans or iPods?

The typical driving requirement for earphones of small walkmans or iPods is around 16-32 ohms and a sensitivity of 98-105 decibels, which allows for efficient power usage and clear sound reproduction.

3. Do all earphones work with small walkmans or iPods?

No, not all earphones are compatible with small walkmans or iPods. It is important to check the impedance and sensitivity levels of the earphones to ensure they are suitable for use with these devices.

4. How does the size of the earphone affect its driving requirement for small walkmans or iPods?

The size of the earphone does not necessarily affect its driving requirement for small walkmans or iPods. However, smaller earphones may have lower impedance levels to match the power output of these devices.

5. Can the driving requirement of earphones for small walkmans or iPods be adjusted?

No, the driving requirement of earphones for small walkmans or iPods cannot be adjusted. It is determined by the impedance and sensitivity levels of the earphones, which are designed to work with the power output of these devices.

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