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gepardcv

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About gepardcv

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  1. gepardcv

    The making of a SuSy Dynahi

    I usually make my own BOMs following the board silkscreens. That way it'll definitely be up-to-date. The only non-obvious parts I remember are the LED, so use LTL-307ELC.
  2. gepardcv

    The Headcase Stax thread

    You mean when the drivers are made or when the speakers are assembled? I was startled when a rattle in a pair of DIY C-Note speakers I built went away after a few hours of pink noise. (And that rattle wasn't imaginary. I have the speakers set up to play with a digital piano and Ravenscroft 275. The woofers definitely made bad noise when I pressed certain keys but not others.) It would make sense if the drivers were not run when manufactured, and it would also make sense to run a speaker for a while after assembly to get rid of problems like the one I ran into.
  3. gepardcv

    The making of a SuSy Dynahi

    Have you already gone through the existing Dynahi thread? There will be some dead links, but using the search function will get you pretty far. https://www.head-case.org/forums/topic/9768-kg-balanced-dynahi-build-discussion-thread/?tab=comments#comment-468974
  4. gepardcv

    Massdrop copycat R2R DAC

    I'm all for knocking down absurd prices, but the decision to dig in puzzles me. The product is getting dragged through the mud on every audio forum, along with Massdrop's name and reputation. Its comms/PR people, assuming they exist, have undoubtedly advised a strong mea culpa along with a solid dose of public groveling, and have so far been ignored. It doesn't even matter if the design was ripped off or not. Assuming the Massdrop-Airist contract was written by someone with minimal understanding, it would have included indemnification clauses specifically for this purpose, allowing Massdrop to ditch Airist with minimal legal fuss. Perhaps Massdrop is financially stretched, and eating the cost of the product and reimbursing the backers would be ruinous.
  5. gepardcv

    The State of DACSES

    I've had a Soekris dac1541 since late summer last year (~9 months or so). It's really good. I made a volume-matching AB (not ABX) switching box, and I could not hear much difference between the 1541 and a Gumby. Sold the Gumby, it's not worth the desk space and it has fewer features (not to mention it has that obnoxious relay that snaps loudly at night in a quiet house when it has no USB signal lock). The original filters are pretty neat and have audible differences — admittedly with sighted testing, but that's way more than I can say for any other filter-switchable DAC I tried. I also recently picked up an RME ADI-2 DAC to play with its DSP. Very neat device. The built-in parametric equalizer works well. I've never heard a 007A+Carbon combo thump this hard after I EQed it to (as best I can without a measurement rig) match the Harman curve (based on Tyll's old measurements of the 007). On the downside, I think it increases listening fatigue somewhat, so it's probably not ideal for long listening sessions. For short periods (like 30min or so), it sounds pretty fantastic and impressive. With all DSP turned off, I cannot hear meaningful differences between the ADI-2 and the dac1541, but I must admit I didn't try very hard.
  6. gepardcv

    Goodbye Tyll. Happy Travels

    Congratulations!! Have a great time out there with Putt!
  7. gepardcv

    Pass Labs discussion

    I don’t have a good sense of what speaker specs make them efficient. I have a C-Note kit waiting for assembly, and was thinking of using that with this amp (8 ohm impedance with a sensitivity of 85 dB 1W/1m). That looks to me like it’ll get plenty loud..?
  8. gepardcv

    i'm on a roll... the kgsshv

    I wondered about this... what is the actual audio effect of high offset? I've never wanted to experiment on my own builds, but I keep hearing about (trigger warning! ) SinglePower amps having +/-150V offsets and such... Does it just distort like crazy? Make noise? Does it clip? Anyone have measurement charts showing the effect?
  9. gepardcv

    Pass Labs discussion

    Reviving an old thread, sorry-not-sorry... DIYAudio Store is running a preorder sale on Pass ACA kits, $317/pop with a dual monoblock option. Includes the works. The default build is 7Wpc (class A), the monoblocks are 20Wpc. I'm really tempted, but would appreciate advice from more knowledgable people here. I've been interested in Pass designs for a while, and this is my chance to get my feet wet reasonably cheaply. But if I don't like it, I'll end up with more amps I don't use taking up closet space (cough)... https://diyaudiostore.com/collections/frontpage/products/amp-camp-amp-kit
  10. gepardcv

    HiFiMAN Shangri-la Jr. Electrostatic Headphones

    You mean the polarity is inverted on the drivers? That's nuts. Does it fail the wiring center/twisted test on https://www.audiocheck.net/soundtests_headphones.php? (Note the quote from the page on the subject: "That would be the last straw if your headphone's manufacturer made wrong connections, but it sometimes happens as reported with very cheap brands, or counterfeit replicas.")
  11. gepardcv

    The Headcase Stax thread

    It's easy. Let's stop pluralizing "headphones". Instead of saying "a pair of headphones", just say "headphone". As in, "I think the SR-009 is a slightly-bright headphone" and "Stax wants to make improvements with the SR-009S headphone". Same for the HD800 and HD800S.
  12. gepardcv

    The Headcase Stax thread

    If Stax currently sells every unit it has the capacity to manufacture, then it might not make sense to do any more marketing. Also, it's far from clear that Stax can scale up manufacturing if demand increases (and we definitely don't want it to respond to rising demand the other way, by raising prices).
  13. Let’s not forget that Focal warranty is non-transferable, so used units don’t get serviced, even if they originally came from an authorized dealer at full MSRP+tax. (Not that Stax warranty support is anything to boast of, either.)
  14. gepardcv

    The Headcase Stax thread

    Could there be something goofy with your playback software or DAC, or the combination of the two? For example, I found that the ODAC clips nastily with software playback volume is set to 100%, but could not reproduce the problem on other DACs.
  15. gepardcv

    2018 PCB Group Buy with TKD pots

    Paid. Many thanks.
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