Recent content by backspace119
  1. backspace119

    The CMoy++ ==With 3D printed case==

    Thank you. I'm trying to see if I could design a product I could sell locally and maybe eventually on the web. (always looking for ways to get a little more cash ;) ) so the issue of headphone killing DC offset from a real ground was rather scary. I know I could implement the protection circuit...
  2. backspace119

    Cmoy Buffered outputs using NJM 4556AD

    After removing global gain and only using local gain on both opamps I recieve a "crackly" sound (especially when there are bass hits) when I use the OPA2134 as the first (amplifying) opamp. When I switch to the 4556 it goes away....I believe I'll just have to reimplement this circuit later If I...
  3. backspace119

    Cmoy Buffered outputs using NJM 4556AD

    I believe I may have fixed it (isnt spitting high dc any more (1 mv on one channel 0 on the other)) I added a local feedback resistor for the OPA that was 47 ohms. I'll test it and post my findings for anyone else who ever has a similar problem
  4. backspace119

    CMoy noise issues [pics and audio]

    cool. do you mind posting the schematic for that here? I've become very interested in the CMoy recently and I'd like to see how you implemented this (I have a generic psu that I'd like to see if I can get clean enough to power the thing)
  5. backspace119

    Review by 'backspace119' on item 'FiiO E11'

    The FiiO E11 is my first professional headphone amplifier and I have to say it was rather unexceptional.   First Impression/ measurements:   The first out of the box impression was incredible. Nice matte black plastic leading to a metal like edge with a notch for the volume nob (very...
  6. backspace119

    Cmoy Buffered outputs using NJM 4556AD

    bud. Im a programmer. I'm very technical. If I had a camera, I'd use it. I have a dumb-phone that unfortunately does not even take pictures (at least not ones that would mean anything to anyone. They are dark and distorted and you can barely make anything out, let alone circuits). I had it...
  7. backspace119

    9V battery charger schematic?

    where would you find an LM317? I wanted to get it from mouser but they don't seem to carry it....I /think/ I found it on amazon but it had 4$ shipping (if I plan on building more of these I'd like to get the components from the same place so that I only pay one shipping fee)
  8. backspace119

    CMoy noise issues [pics and audio]

    First things first, power it with batteries.   Did that solve the issue? No? continue on   I built one a few days ago that had the exact same issues at first. The issue got better (wasn't completely fixed) when I moved components around a bit and did some resoldering (mine was a little more...
  9. backspace119

    Are buffers designed to work at low impedances (16-600 ohms) (since opamps aren't)

    I print my cases (<$1 per) volume pot is the alps (will not go lower and it saves money on a switch) psu is as cheap as can go. I'm not worried about the main opamp (going to use a nice opa2132/4) I'm worried about the output buffers (offerring bass boost in some models (and my personal one will...
  10. backspace119

    Are buffers designed to work at low impedances (16-600 ohms) (since opamps aren't)

    After reading this article I was wondering if buffers, with their higher output current, were designed to work with low impedance loads.    The article also mentioned that, when used properly, opamps are mostly transparent and the "cheap" 5532 will more often then not perform just as well if...
  11. backspace119

    CMoy major issues! At a complete loss at this point! Need Help!

      It's not the same issue as a previous thread and the discussion there was about something a bit different. I'm sorry if this is improper etiquette I'm still new to forums writing.
  12. backspace119

    CMoy major issues! At a complete loss at this point! Need Help!

    Ok so I had some time to ohm out most of the socket this morning (ohmed the wires first again to make sure there wasn't a fault. I got a 26 K connection while I got a 108k (going up) connection between v- and the pin beside it. (input + iirc)......any help?
  13. backspace119

    Reply to review by 'backspace119' on item 'Beats Pro Over-Ear Headphone (White)'

    I give them a bad rating because even my old generic headphones sounded better than these. (These had very poor low end performance which is important to me.) And obviously my new Tiamats blew it out of the water
  14. backspace119

    Review by 'backspace119' on item 'Skull Candy Smokin' Buds Earphones Black Rubberized'

    These are definitely great sounding and well priced ear buds. I've never really had a pair that sounded this nice before and I only paid $40 for them. If you're into Dubstep, Trap, Hip-Hop, Rap, or other music like this, then you will definitely enjoy these buds. They have very nice low end...
  15. backspace119

    Reply to review by 'backspace119' on item 'Beats Pro Over-Ear Headphone (White)'

    If you read my review you'll see that I had a very different experience with the low end performance....I know I ranted a little bit but these things really pissed me off. Did you seriously get good lows out of these? Me and a friend both had a pair and neither performed well on lows (Tiamats...
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