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iPod output impedance? | Headphone Reviews and Discussion ...
https://www.head-fi.org/threads/ipod-output-impedance.583426/#:~:text=As%20expected%20the%20DF%20depends%20on%20both%20the,output%20impedance%20with%20a%2010%20Ohm%20load%20%28headphone%29
"Impedance output" in the iPod Classic 16… - Apple Community
https://discussions.apple.com/thread/3523474
And no more about the output of the iPod. I can only see the impedance of the headphones included but, I think, is not necessary the same value. " Headphones. Earphones. Frequency response: 20Hz to 20,000Hz. Impedance: 32 ohms"
iPod output impedance? | Headphone Reviews and Discussion ...
https://www.head-fi.org/threads/ipod-output-impedance.583426/
The larger the DH the better control the amp will have over the driver. As expected the DF depends on both the impedance of the IEM and the source in our case the 5 Ohm output impedance of the iPod. DH ( iPod ) = 10 Ohms / 5 Ohms = 2 A poor DF would be using a 250 Ohm output impedance with a 10 Ohm load ( headphone )
iPod Touch 5G Audio Quality Measurements
https://www.kenrockwell.com/apple/ipod-touch-5g/audio-quality.htm
Output Source Impedance. 1.4 Ω, including my cheap cables. Output Noise Levels-106.8 dBV, A-weighted, playing zeroes (silence).-120 dBV, A-weighted, idle. Frequency Response . iPod Touch 5G Frequency Response, 200 kΩ load, 1 V RMS output. As expected, the iPod Touch 5G's response is ruler-flat. Let's expand the scale and look more closely:
Ipod touch 7th gen output impedance | Headphone Reviews ...
https://www.head-fi.org/threads/ipod-touch-7th-gen-output-impedance.909686/
Yea, I would expect of an Apple portable device's headphone jack output impedance to be under 10-Ohm, like around 5-Ohms, give or take. If Apple was smart, under 5-Ohms. Topping DX7s & Audio-GD NFB-11.28 & Dark Voice 336SE. Beyer T90, HD58X, Fostex T-X0.
iPod classic (120GB) - Technical Specifications
https://support.apple.com/kb/SP498
Audio. Frequency response: 20Hz to 20,000Hz; Audio formats supported: AAC (16 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (16 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, AIFF, and WAV; User-configurable maximum volume limit; Headphones. Earphones; Frequency response: 20Hz to 20,000Hz; Impedance: 32 ohms; Video
iPod Touch 6 has a lower output impedance than iPhone 6
https://hydrogenaud.io/index.php?topic=114938.0
8. Put the numbers into this output impedance calculator. I did these measurements only on the right channel (red plug). The raw results were: iPhone 6-----Open - 0.508 V 22 ohm - 0.435 V Output Impedance - 3.69 ohm iPod Touch 6th Gen-----Open - 0.519 V 22 ohm - 0.481 V Output Impedance - 1.74 ohm
Apple iPad Audio Performance - Ken Rockwell
https://www.kenrockwell.com/apple/ipad-1-audio.htm
Output Impedance. Tektronix TX3, the output voltage drops to 93.7825%. Algebra tells us that the source impedance is 5 Ω at 1 kHz. Frequency Response. Signal: -20 dB FS sine wave, 44.1 k samples per second, 1,411 k bits per second AIFF file on iPod Touch. iPod at maximum gain. 100 kΩ analyzer load . 5 Hz: -0.2 dB. 8 Hz: -0.1 dB. 10 Hz: 0.0 dB. 20 Hz: 0.0 dB. 50 Hz: 0.0 dB. 100 …
What is Impedance in Audio? Input and Output …
https://virtuosocentral.com/what-is-impedance-in-audio/
If your equipment receives an audio signal, it has input impedance. It recognizes the signal coming from the other piece of equipment. Where connected, it “sees” the output impedance from the other device. As the signal passes from one place to …
audio - What is the impedance of the line/headphone jack ...
https://apple.stackexchange.com/questions/57186/what-is-the-impedance-of-the-line-headphone-jack-on-macbook-pro-retina
Mac can detect the impedance of the connected device and will adapt its output for low- and high-impedance headphones, as well as for line-level audio devices. When connected headphones with an impedance of less than 150 ohms, the headphone jack provides up to 1.25 volts RMS. For headphones with an impedance of 150 to 1k ohms, the headphone ...
How important is impedance matching in audio applications ...
https://electronics.stackexchange.com/questions/6846/how-important-is-impedance-matching-in-audio-applications
Impedance matching is not used in modern audio electronics. A mic output might be around 600 Ω, while mic preamp inputs are 1 kΩ or more. A line output will be something like 100 Ω, while a line input is more like 10 kΩ. A loudspeaker amplifier will be less than 0.5 Ω, while loudspeakers are more like 4 Ω.
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