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gwurb

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About gwurb

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  1. 10mVpp is really low. This has 50mVpp typical: https://au.mouser.com/datasheet/2/687/tpi30a_j_datasheet-1889920.pdf I would be curious what is commercially available at 2A+ . Maybe an LC filter at the output could be a consideration?
  2. I have great memories of listening to tapes on my Walkman. I really enjoy some music on the car radio, then I hear the same song on CD and I am amazed by how much more I enjoy it, and then I later hear it on car radio again and I still enjoy it. I find that it's more about the music then the quality: to a point. There is a limit where something sounds so bad (based on poor quality recording or radio noise, etc) that I would rather turn off the stereo as my ears and brain hurts when something sounds really bad to me These days I tend to prefer digital recordings. But ove
  3. Further information: This is a great slim (4.4 x 10.9 x 0.9 cm) DAP with internal storage, and support for microSD cards. It has digital noise cancelling that can be turned on or off. It has a number of audio enhancements and equalizer settings that can be turned on. It supports audio in: MP3, WMA (Non-DRM), AAC (Non-DRM), HE-AAC, FLAC, ALAC, AIFF, Linear PCM, MP4, WMV 9. It can be used with 3.5mm wired headphones or it can be used as a Bluetooth transmitter. It has excellent battery life. The physical buttons are great, and much nicer to use than a touchscreen. It has FM radi
  4. Further information: BTR5: Portable High Fidelity Bluetooth Amplifier and DAC. BTR5 is a Bluetooth receiver and a USB DAC. It has two DAC chips, 3.5mm unbalanced output, 2.5mm balanced output, and Bluetooth 5.0 . It supports phone calls, and has NFC for pairing. It is certified for Hi-Res audio and Hi-Res wireless audio. It gives you use of Bluetooth aptX, aptX HD, aptX Low Latency, AAC, SBC, and LDAC audio codecs. BTR5 is a small but powerful amplifier that can let you use your wired headphones as wireless, or enable another audio device to be a Bluetooth end poin
  5. I've bought Monoprice cables on Amazon. I like their quality for their price.
  6. Please take this in a positive way; please revisit EM propagation physics as far as reflections go.
  7. You are spot on. The importance is application dependent. The most obvious example where power transfer is not the top priority is headphone amplification. The output impedance tends to be very low, the cable impedance is really low, yet headphones' input impedance is generally at least a magnitude higher (at times multiple magnitudes). So there is no attempts for maximum power transfer. There are other advantages to the headphone amplification system design that sacrifice power transfer.
  8. At all real world wave ranges lol at least when considering classical physics. 'Audio' frequency range doesn't enjoy some sort of exclusive life outside of physical phenomena. How much of an impact mismatched impedances and wave reflections have at various frequency ranges is a separate question...
  9. Matching impedance reduces signal reflections and aims for maximum power transfer. If you can't match impedance then the next best thing is a big differential between lower output impedance of the source, and higher load input impedance. In both of those situations the transmission line length becomes a smaller factor in system, but for slightly different reasons. Edit: When considering impedance matching in this situation it is best to think of source to transmission line interface and then transmission line to load interface. So for maximum power transfer source output imped
  10. The design discussion probably needs to move to the related science topic.
  11. It's a very good way to design a system that the designer subjectively enjoys at the time of adjustment Remove the adjustment for personal preference and it's a way to design a system. I would aim for reference/accuracy of reproduction, or what you may be referring to as reducing errors. Start with a baseline, understand the baseline, build your circuit, understand how your circuit alters the baseline, adjust the circuit to have the least deviation from baseline possible, address the next part of the system, keep going until all parts are finished. Need to keep track
  12. https://www.dpamicrophones.com/mic-university/facts-about-speech-intelligibility There wouldn't be a single frequency or hump relating to voice reproduction 'issues'.
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