Recent content by AudioCats
  1. AudioCats

    small transportable Stax amplifier Modification thread

    updated the 212 mod post above. I actually found a combination of cable/mod that makes the 212 sound as good as the Xh. I was surprised, considering the Xh has blackGates in it and the 212 doesn't (won't fit anyway). The Shinkoh resistors and Mundor silver/teflon (interconnect) seem to be the...
  2. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    I am not sure if the mini cup over the driver in the 25 is an attempt to improve the sound, though. The driver cup could just be for cost saving (simple outer cup and simple inner cup, instead of a single complex shape with a partition wall in the middle. I suppose it is more difficult to add...
  3. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    agree, we can probably do a lot with stock drivers in place, but is it worth the effort? I are not trying to do R&D work for Bose on their now discontinued models. If I am putting that much effort into my QC2's, might as well start with some "audiophile-approved" drivers and build up from there...
  4. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    yes damping is needed but the stock drivers simply don't have enough resolution. And since we are using the internal circuitry which runs on just 1.5V and even includes ANC function... I suspect the iGrado drivers will be about as "high-end" as it needs to go.
  5. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    who said anything about science? It is just for some simple DIY fun...
  6. AudioCats

    BOSE Headphone Mods

    started a QuietComfort mod/conversion thread in the DIY section.
  7. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    Driver Upgrade QC2 and QC15 have 40mm 32 ohm drivers. If I want to improve the sound maybe I can put in some better drivers. The entry level grado drivers are 40mm and 32 ohms, might be a good fit.... how about using the drivers from iGrado (available on ebay for $35). To remove the Bose...
  8. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    Headband replacement (more robust steel headbands) * this was done on QC2. For QC15 it is about the same. I bought a pair of used QC2 for cheap (~$20) from powerbookMedic, mainly to see how the older model's ANC compares to the QC15. The plastic is old and the yokes soon disintegrated at the...
  9. AudioCats

    Bose QuietComfort Headphones Mods & Conversions

    Starting a thread to document some of the stuff I did on my Bose QuietComfort phones. If you have done mods/repairs to your QC's please contribute. my reasons of wanting to playing with Bose QC's: * Bose active-noise-canceling is very effective, especially in reducing the low frequency noise...
  10. AudioCats

    Creative Sound Blaster E3 mod / adaptation (?)

    The DAC chip is PCM5122, pin20/21 are connected together for clock input, 22 for Data, 23 for WS / LRCLK. (in the photo below, brown wire= clock, blue wire=data, white wire = WS/LRCLK) The PCM5122 is configured for I2C control. Audio data is supposedly I2S.
  11. AudioCats

    Audio Technica AT-PHA50BT bluetooth amp modifications

    ** Starting a new thread to document the modding of this little amp. Maybe somebody else can find the info useful somewhere down the road.   The goal of this mod is to (hopefully) improve the sound quality to the level of Creative Sound Blaster E3. Some sound impression/ comparison of PHA50 vs...
  12. AudioCats

    Creative Sound Blaster E3 mod / adaptation (?)

    Sound impression of Creative E3 vs AT-phA50bt * Bass: E3 has deeper and cleaner bass, without the boominess (which the A50 displays from time to time, especially with tracks like Katie Melua's Red Ballons). * E3 has better clarity and better details, by quite a bit. * Voice: E3 has more...
  13. AudioCats

    Creative Sound Blaster E3 mod / adaptation (?)

    Might as well add some info about the Audio Technica AT-PHA50BT here, since they are similar type of devices.   Size comparison: overall, the A50 is about half the size of E3:            
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