Portable headphone amp to smartphone w/ mic passthrough?

Discussion in 'Portable Headphone Amps' started by halcyon, Oct 18, 2017.
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  1. Wiljen
    Phone makers removing the 3.5mm Jack is just one more push for buying a DAP instead of using your phone. DAPs already sport better dac chips most of the time, better amplification circuits, and better battery life but if you need the push of it not being possible on a phone to finally make the switch, maybe removing the 3.5mm jack will be the deciding factor. I used my android phone as my dap for quite awhile but once I made the leap to a dedicated device, I found all the reasons why I should have done it a long time ago.
     
    halcyon likes this.
  2. halcyon
    Hi, I definitely agree and share the sentiment for music.

    However, I also listen to a lot of audiobooks, podcasts and even youtube videos (video off, as audio) and for this it is much more convenient to use a smartphone. And when I have IEMs inserted into my ears, I don't want to keep unplugging them and replugging another set, just to take a phone call.

    That's why to me Smart phone + wired headset w/ mic functionality is a great convenience.

    For music and dedicated listening, DAP all the way (when on the go, otherwise I prefer loudspeakers myself :-D ).
     
  3. antdroid
    Have you thought about using something like the Fiio BTR1? It's bluetooth, but can use TRSS and also has a built-in mic which works well. It sounds great too in my opinion. I have both a portable DAC, and the BTR1 and I keep going towards the BTR1 because its just easier and doesnt affect battery life as much. I do have to feed it to an external amp if I want the best sound quality using planars but for most portable headphones, it provides plenty of power.
     
    halcyon likes this.
  4. davidland
    I also prefer Apple settings!
     
  5. DanWiggins
    Merry Christmas! Amplifier goodness ready to start mass production.

    We have the final schematic and PCB layout optimization done, THD+N is even lower (less than 0.01% across the entire band at a 1 mW output), crosstalk even lower (90+ dB from 20 Hz to 20 kHz), less than 1 degree of phase shift over the entire audio band, and essentially zero RF interference.

    It is still tiny and still delivers a massive amount of power (4Vrms output with 150 mA current, and a 0.2 Ohm output impedance). And it still has a solid 8 hours of run time (with 1 mW continuous output) on a 20 minute charge! For reference that board is 25mm wide, 40mm long. The amplifier and battery come in at 10.9 grams, and with the enclosure it weighs under 20 grams.

    And yes, it will be a white PCB with black silkscreen. What else would you expect from us? :)

    [​IMG]
     
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