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  1. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    A Powercube would be so cool. :cool: If each of the ASR members buy me an amplifier I will send you a dozen of them that you can try to break with your brand new Powercube :p
  2. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    Thanks for the proposal, very kind of you! I already have an autoranger. I am partially happy with it, especially with the "auto" part that is slow and miss features like an hysteresis allowing to keep the range stable when the input is "in between". So I am using it in manual mode. Still...
  3. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    The closest audio analyser I am aware of is the APx555 from Bruno P. And I guess that measuring my amps would be quite low in his priority list :). I also believe that it is cheaper to rent an APx555 for a month than 2 days of test time in a lab. Anyhow, I need an accurate measurement system on...
  4. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    Handling 6 color combinations has a cost that the margins on the 4215 can absorb without too many consequences. This is not the case for the other amplifiers. If it happens that most of our sales on the 4215 are done with the black cover, then the Ncore versions will switch to black. On the...
  5. boXem | audio

    DIY Purifi Amp builds

    The thing that I didn't consider is that you have absolutely no sense of humor :rolleyes: Since it is lecture time, please consider checking people's background before lecturing them on subjects that you do not fully understand.
  6. boXem | audio

    DIY Purifi Amp builds

    No doubt that you are an EE Tom ;) Datasheet page 22.
  7. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    Only a few Hypex based stereo ones have been Han-crafted. But I am still building them in Solo ;).
  8. boXem | audio

    Say "Hello!" to boXem | audio Arthur series, Hypex and Purifi based power amplifiers

    It is available now. Only on the 4215/E2 aka "the Purifi". I am really sorry for such bad news :D And thanks for the nice words!
  9. boXem | audio

    Class D Amplifiers 101

    And now you got a new one ;)
  10. boXem | audio

    Class D Amplifiers 101

    How to ruin a good thread 101 :rolleyes:
  11. boXem | audio

    Class D Amplifiers 101

    Cheapness may be relative, simplicity is just amazing. This is the amp that made me become a Bruno P. fanboy :eek:
  12. boXem | audio

    Class D Amplifiers 101

    One can not do post filter feedback above a few dB if the amplifier is not self oscillating The phase shift induced by the filter being close to 180 deg. And yes it simplifies the design in term of part count, not in term of engineering, The variable oscillation frequency presents interesting...
  13. boXem | audio

    Class D Amplifiers 101

    Loads of feedback kill the dead time distortion. Other sins too. Self oscillation is the *easy* way getting loads of feedback. Judging an amplifier based on a YouTube video while playing ride of the walkiries on microscopic 2 ways? Interesting...
  14. boXem | audio

    Class D Amplifiers 101

    Or use a self oscillating amplifier with loads of feedback.
  15. boXem | audio

    Best spec ADC Chip currently.... ??

    I think that your hard work deserves more than these 2 straight lines done with paint.
  16. boXem | audio

    WANTED: Topping Multichannel DAC (list your wants)

    Sure. But it's remote is usable. Since you didn't mention the remote, there are dozen of pro interfaces that seem to perfectly fit the bill, and more :-)
  17. boXem | audio

    Snake Oil Department, Top This

    Well, I read a esoteric cables maker claiming that separating the '+' and '-' wires improves channel separation. That gave me a good laugh but I am now wondering if this is not a trend among these people. I had the same thing in mind. My kids have a train circuit made with wood that resembles a...
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