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  1. What The Hell Happened to Head-Case?!?!? TLDR version: The datacenter that the head-case server is located in sustained a power outage on April 4. When the backup generator kicked on it caught fire and that lead to the fire suppression system (a fucking water based one!) kicking on and causing water damage to equipment. The head-case server was in the 'more affected' area of the datacenter and as such was offline until early in the morning on April 24. For further details on the incident you can see here: https://webnx.com/outage-updates/ You may be wondering why during such a long time the site wasn't simply migrated elsewhere, this is a fair question and the answer is simple. As this is a hobby site the backup process hadn't been properly verified as working in quite a while and the latest verified backup was nearly a year old. Migrating the site and loading it from that last verified backup would have meant losing a years worth of content. This was not a valid option and until I could confirm that the drives in the server were dead I wasn't willing to restore that old of a backup. From what I can tell there has been no data loss but I don't currently have a full report as to what if any hardware needed replacing to get the server back online. Due to that lack of info, I don't trust the server and I wouldn't be surprised if there's some additional downtime due to hardware issues. The Future A fresh backup at the time of this post has been taken and moved off-site. Over the next week or so a new backup process will be put in place and verified. After that is done it's very likely that the site will be moved to a new hosting provider. Further details about any move will be provided at the proper time.
    45 points
  2. It's been a month but the CRBN is finally here, well this is actually the second set I've received. First set was one of two units to have an assembly issue which Audeze have now identified and fixed. I sent that one back and they sent a new one out. Now these are loaner sets but if I want to keep it, I will buy it. Just wanted to make that clear as I always own everything I tear down. The first set was setup to make it easier for me to take a peek inside so the pics I'll post later, will be of that unit. They are identical though and to say the CRBN looks gorgeous... well that would be an understatement. First thing that came to my mind when lifting out of the sturdy aluminum flight case, was a comparison to the Hifiman Shangri-la jr. Similar price range (I paid 4000$ for my set back in the day) and by comparison the Shangri-la looks like a 200$ Aliexpress special. The carbon fiber headband, the forged carbon earcups and nice thick leather earpads. Yeah, this is for sure no Hifiman product and it really puts Stax to shame with their shitty SR-009 headband design. Not that I was expecting anything less from Audeze but the attention to detail is nothing short of exemplary. Nice long strain relief on the cables as they enter the cups, the quality of the Stax plug, the sheer comfort of having these on the head (even with my melon of cranium) and the list goes on. The only issue I could find with them (and it was true of both sets) is a rather strong chemical smell as they are fresh out of the box. It doesn't bother me at all but it might bother some so best mention it. In terms of amp requirements, they are rather power hungry. It was a clear design choice to make them a bit less sensitive so the amps need to be pushed further in terms of volume level but it's nothing extreme. I had a KGSSHV in my system when the first unit arrived so I kept that to compare against the new one. It drives them just fine but the Carbon is a better choice with roughly 4 times the power. I would place the KGSSHV/KGST as the baseline for them to get excellent performance and it only gets better from there. Now it's been only been an hour or so with this second set (a few days with the first one) so it's early but first impressions are great. To keep it short, it's what the Sennheiser HE90 could have been but never managed to do. The CRBN has that same ethereal, diffused quality but with far more midbass and bass presence. They are not the bass monsters which the 007's can be but there is enough there and they are not bright or forward sounding at all. I'll post some more impressions later and the teardown pics as well.
    27 points
  3. Finally done! I regrettably sold my previous KGSSHV Carbon a while ago, this one’s not going anywhere soon. This is a 400V, 19mA version, using the ground plane amp board, Sumr transformer and Goldpoint V47 attenuator. I bought the heatsinks from China and had all the drilling and panels done at Front Panel Express. I pulled out the Canon 5D from the cupboard for some tasty shots.
    26 points
  4. Here's a new twist on my T2 build. I've added both the HE-90 jack as well as a custom built Teflon HE-60 jack with appropriate voltages/resistances. This one is in black chrome That's the back of the power supply...
    25 points
  5. It's been a long week so not a lot of time to sit down and listen to the CRBN but when I've done so, they always deliver. No issues at all like the first set had and they are very comfy for a couple of hours or so. I'll try to sit down for a few hours straight but they are so light and the earpads so supple that I don't foresee any issues. It did take me a while to get used to the more diffused sound stage as I thought they were off balance a few times. Just the different presentation playing with my head... I'll take some more time until my final impressions but how about some teardown pics instead. Now do remember that this set was headed my way and Audeze knew I would tear it apart... so they were nice enough to not fully adhere the earpads. That's why they have the paper backing on them. First shot showing the gorgeous carbon shells. Earpads off showing the baffle and the nylon screws which secure the baffle to the back. The 3M adhesive they are using for the earpads is very strong so these are no easy headphones to get into. The earpads are very thick and some of the nicest I've ever seen so I don't foresee having to replace them anytime soon. Another shot showing the (phenolic?) baffle. Now remove the screws and the set comes apart, the baffle screws through the earcups and into the back piece. There is quite a bit of foam behind the drivers but it is very open. Audeze were shooting for a fairly high damping design so this makes sense. Here is the frame with the foam in place. That small dot falls off easily which is good, that means no adhesive in place to make a reflective surface inside the foam. The back cover is a very nice piece and I like the use of fine mesh to keep most things out of the cups Now remove the foam from the picture above and we have the back of the driver. They have gone for connections through the structure to the different elements unlike say Stax who take it all to one point. Nothing wrong with either way of doing things. Here you can also see the construction of the cable which is woven and it feel like it's two triple strands from the Stax plug, up through the cable split and into each cup. I do wonder how much capacitance braiding the cables like this does add to the system (a flat cable always be superior in that regard) but its similar to what Sennheiser do on the HE-1 and Mr. Speakers on the Voce. Far cry better than the crap Hifiman call a cable... on a 18k$ set of headphones though. Another shot the driver free of the earcup. Same thick woven material used for the dust covers front and back. Side profile showing just how thin the driver sandwich is and also its MRI safe roots are evident. Not a whole lot of metal in that, similar to what Sennheiser did with the HE series back in the day. The HE60 was just two pieces of extruded plastic, painted gold and then the mylar stretched onto the frame. Kinda funny to see this approach compared to what Stax are doing with the SR-X, ever more complicated stator designs whose benefits are not quite clear. Last but not least, the very nice plug on these. That is aluminum and then molded plastic... very nice indeed.
    24 points
  6. I've always admired this group. The hobby and community got me through some rough times, even when I didn't say I was going through them, but just coming here and laughing my ass off at the shenanigans was enough to brighten up my day. It's been a while since I've been around, and life definitely throws some unexpected curve balls. I got married a month ago. I'm moving out of my apartment to a new home, where my wife is going to help me NOT turn the place into a man cave, but make it cozy and welcoming. I'm in love. When you know, you know, as the saying goes. Things change, people, change... I think I evolved leaps and bounds the past year in so many aspects. I've been packing for my upcoming move, two weeks away. Been having fun going through a lot of my audiophile gear that at some point I stored away and forgot about because another flavor of the month came about. I was remembering the meets, the trips to Cigar City in Tampa, Hunahpuh days, etc. Good times. I guess I just wanted to drop by and give thanks to everyone. Nostalgia hit hard. Fun times! Good stuff.
    21 points
  7. Got the single stitch taken out of my eyeball today. Tested vision at 20/15. Everything is healing spectacularly.
    21 points
  8. A CFA2 balanced. Finished this a whiles back.
    21 points
  9. Further along in converting the garage to a proper shop, they poured the concrete for the foundation wall today. I had to leave a mark while it was still wet...
    20 points
  10. In progress Amp design by me, power supply designs and circuit board layout by kerry, support by birgir +/-300 volt power supplies. complementary push pull all bipolar design with cmos style multiplying current mirror.
    20 points
  11. The Bay Area moon was really something last night with its halo of ice crystals in the atmosphere. This pic is from the front porch in Mayberry.
    20 points
  12. And...it's done. We'll, the concrete part. Steve and I need to build a wall, put in doors and a window, get a little electrical done, and then start making sawdust again. This time with a serious dust collection system and air filter in place.
    19 points
  13. Too much talk of tools, and not enough of What Are You Building Today? I made a lamp.
    19 points
  14. Retirement is like a permanent vacation. Albeit mostly a staycation. “Up North” for a week of leaf peeping, hiking and discovery. Nicest cabin I have ever stayed in.
    18 points
  15. Finished up a Soekris dam1021 build. This is the new rev7 board with a lot of improvements trickling down from the flagship dac2541. HiFi2000 case, FPE panels, JLSounds I2SoverUSB v.III input, LT3045-based power supplies, direct R-2R output intended for my headphone amp, and buffered output for my powered desk speakers. My aesthetic stylings and DIY skills haven't advanced even the tiniest bit since 2010, but I like the brutal elegance and minimalist functionality. Most importantly, it sounds really nice.
    18 points
  16. Working on my first ever coffee table. Have the base built, but not finished. Next up is making the top which is going to require me to learn Fusion 360. Top is going to be 2” thick in the middle with a radius on the bottom following the radius on the top of the base.
    18 points
  17. Finish a new pair of electrostatic headphones today.
    18 points
  18. I'm pretty happy with the finished product. May it house many fine incense boxes.
    18 points
  19. Just before they pulled the patch off of my eye, they told me that more times than not, your vision won't be fully matured for about a week. Then they took off the patch and immediately tested my vision. Right out of the gate I could easily read the 20/20 line of the chart. I could read all but two of the letters on the 20/15 line. The Dr. told me that at my appointment next Thursday, she wouldn't be at all surprised if my vision was 20/15. She said that happens in about the top 10% of patients. I couldn't be happier. It's so nice to be able to see in stereo vision once again. It's been about 2 years since I've had any real vision out of my right eye. And my depth perception is fully back! I may need readers in a dark restaurant, but I'm typing and reading this now with no glasses on.😎
    18 points
  20. Some more good progress. The amp is up and running I've got two issues on the board, but the amp, power supplies and USB-C PD / battery management are all working great. The wires going to the pot are temporary. There'll be a board for the analog/DAC inputs. The PD chips are small with lots of pins on them. I'm surprised I could solder them Lots of 0402 chips on the right side of the board... Here's the amp running with the battery (I need to have the input board done before I can put the batteries in the chassis). This is with the amp running and USB-C charger plugged in. Below, it is sending .18A to the batteries. The battery management will stop charging once the batteries are at about 12.5V. It drops the current as it gets closer to a full charge. With the charger plugged in and batteries fully charged, it doesn't draw any power from the batteries. At the moment, it negotiated 5V from the charger (source) and is boosting it to just above the battery voltage. If we wanted, we could source power so it could charge you phone too. I'll do a drawdown test tomorrow to see how long it will run on a charge. Overall, I'm very please with this amp. Kevin's amp design is fantastic. I've been listening to it for the last several hours with my SR-007's
    18 points
  21. I built my sister a redwood clad mailbox stand Then Steve and I tried to dig post holes in dry, compacted dirt before hiring a guy named Sergio to do that task. We set the posts with a high tech expanding foam product made by Sika that worked great. It is in a bag with two bladders that you pop to combine and then pour in the hole. It works very fast and was set in three minutes. No bracing and waiting for concrete to set.. The best part is that Home Depot had marked down these bags from $10 to $2.38 and when I checked out they were rung up as $0.01 each. Two cents for footings is pretty cheap.
    17 points
  22. I have finally completed my "return to the hobby" stack, by finishing up a recasing and upgrade of my 13-year-old M3. The design itself is 16 years old now, and it still has the same compromises from way back then..... but with a modern OPAMP, easy to drive phones and reasonable execution, I still think it sounds bloody marvellous. Highlights are a HiFi2000 galaxy case, FPE panels, ADA4627-1B OPAMPs, TKD 2CP2511 pot, 2" sinks and 110 mA output stage bias, complete electrolytic re-cap with Panasonic FR and Nichicon UHE, S11 at 27V, magnetically shielded SumR transformer (30VA, 12+12V), Cree zero-rec Schottky diodes, and a deliciously gaudy volume knob (so shiny, I had to edit out and hide my own reflection!). Sitting between the R-2R DAC and Focal Clear as my office rig, I'm a very happy camper.
    17 points
  23. Got up early to enjoy spectacular September weather.
    17 points
  24. Another Carbon in the works, I received my panels and drilled heatsinks back today. I haven’t put it together yet... I sure hope everything fits. Adobe Illustrator preliminary file:
    17 points
  25. Milo and Otis, wow is all I can say. As for me, a gift for a disabled warrior to go with a wheelchair ramp for his house. Carving the handle was one thing but etching the trident was a nerve wracking endeavor. One shot with no do overs. Thanks Mark, you da man.
    17 points
  26. Helped a friend make it home safely: Remember kids, don’t try this at home, my first graduate student at EIU studied the atrazine and glyphosate dynamics in snapping turtles.
    17 points
  27. Making some good progress on the amp... I’ve got the USB-C PD all soldered on and ready for testing Here’s the face plate with the jack Here’s the amp assembled, but I still need to finish the power supply and amp sections of the main board
    17 points
  28. Yesterday - hung out with the local riff raff. Given the size, likely a male. He hung around in that tree for a couple hours before moving on. Was pretty impressive to see.
    17 points
  29. After 5 years from the time I acquired the PCBs and parts, I finally took advantage of the free time created by the pandemic and completed my KGSSHV. This is the offboard version with +/-500V supply. I know many have since moved on to the Carbon but I am very happy with the results and plan on building myself a Carbon in the near future. Hopefully it won't take me that long this time. Thanks to Kevin for the great design, Spritzer for his support and providing some of the parts and this thread from which I learned a lot. The case is from Aliexpress but I got a new front panel made at the local machine shop.
    17 points
  30. Some impression of X9000 I would like to share Mine is the first batch in Japan. Serial number is #6. I have it delivered to Australia immediately after launch and receive it today. As my system is incomplete at the moment. There are quite a few good cables coming (Odin 2, Stealth Dream etc). This is only a brief introduction of my first impression of X9000. My setting is: Source: Jeff Rowland Aeris Power conditioner: ISOTEK TITAN + NOVA GII Amp: BHSE (Mullard XF3, Philips Metal Base EL34 Disk Getter), SRM-T8000 (Stock Tube) Reference Headphones: Sennheiser HE90, SR-009S The build quality of SR-009S is worse than SR-009 which made me a bit worried about the X9000. But when I open the box, the SR-X9000 just look gorgeous, its build quality is to the state-of-the-art standard. The grey and brown color combination looks very good. Here are some details of the X9000. Please make sure you read manual when attach the cable to X9000. There are design to stop you attach in a wrong way, but you could still attach the wrong side. I attached the left cable to right unit at the first try and subsequently correct it after I read the manual. There might be some potential harm to the headphone if you attach the headphone cable to the opposite side. RELAXED The main impression of X9000 is RELAXED. Yes, no matter what kind of music you play, it give you a very relaxed sound signature. It is not forwarding sound at all. Even you play most intense Orchestra works like Tchaikovsky Symphony No. 6 by Teodor Currentzis. You will feel the brass and string instruments hoarse like you are getting fxxked by the Orchestra in climax part when you listen to HE90, but you will never feel that with X9000 even you switch to very high volume. Yes, you can switch to a incredible high volume without getting irritable. However, it is strongly recommended you to control the volume as you wouldn't feel any uncomfortable until you feel pain in your ears. It might cause permanent harm to your ear. It depends on your taste if this kind of relaxed feeling is good or not. For me, I have HE90 for Orchestra works so it is not a issue at all. But if you buy X9000 mainly for Orchestra, you might need to adjust your source and accessories to fit its style. To me, when playing Orchestra works, the HE90 is like BPO, or even BSO, the X9000 is like NHK. I am not saying NHK is not good, I just prefer BPO. SENCE OF TABLEAU The second impression of X9000 is sense of tableau. You sometimes feels that 009/009S is pouring music into your ears like water when there are lot of details, but you will never feel that with X9000. Everything is always well arranged in a good manner, in a relaxed way. It is really a pleasure to enjoy music with it. Unlike 009S, the X9000 focus on the whole picture rather than details. Each part of music combines together and you even feel the sound is tangible. To me, it lack of the ethereal and diffused sound signature of HE90. It feels more 'real'. After you listen to X9000, you will find it express music in a more superior and comprehensive way than other STAX headphones. (except SR-Omega, I've never listened to it before) SOUNDSTAGE The X9000 offer incredible soundstage compared with SR-009S and any other STAX earspeakers I have. To me it is even better than HE90 to some extent. It feels like the the sound is emission and diffused in a very neutral way. You will easily forget you are wearing a headphone. (And yes it is very comfortable to wear it) To compare, when you listen to piano live performance recordings, X9000 is like you seating at the audience seat, HE90 is like you seating on the stage and 009S is like you head is in the grand piano. I am not saying SR-009S is bad. Actually, there are some person prefer to listen to Piano in closest distance to feel the metallic touch of the sound. It's upon your taste. SOME OTHER FEATURES Compared with SR-009S and HE90, X9000 is a more neutral sound headphone, it is neither bright nor warmth, but it is still with very significant 'STAX' style. X9000 is not a bass monster like SR-007. But their base has sort of similarity. Compared with SR-009s, the bass of X9000 is not the rock-firm style. It is a more bouncy, soft yet surrounding style bass. It is more like HE90's bass performance. I personally like it very much. But if you really like lot of bass then the headphone probably is not for you. I have tried X9000 with all sorts of music, including Orchestra, piano solo, violin solo, chamber music, Japanese POP, Animation music, Chinese Pop, Acapella, electronic music. It fits almost all sorts of music in my opinion. I prefer to use HE90 to replay Orchestra and Violin works as it is more energetic, but it is after all personal taste. To me, X9000 is too relaxed for some music, it just lack of the spark that ignite my heard. But when I want to listen to music and take a rest, I will definitely prefer X9000. AMPS OPTION I compare my headphones on BHSE and I've also tried SRM-T8000. SRM-T8000 can drive X9000 pretty well just as SR-009S. But overall it is even more softer than BHSE. To me I think BHSE is a better option.
    16 points
  31. Moar steel and a vapor barrier.
    16 points
  32. It's been a while since I built something goofy just for the sake of building something goofy. This is a JFET buffer pushing a stepup transformer (LL1674) to a 71A parafeed output stage using some custom Lundahl parafeed outputs. Tubes are CCS loaded with CCS driven filament supplies and shunt regulated bias. HT PS is choke input with a small regulator before the CCSes. The driver PS is dual Jung regulators. Sounds lovely other than for the slight hum that eludes me. It's surely something stupid that I won't find without rewiring the whole thing.
    16 points
  33. In other news, I just got back the analog input board and assembled the amp. The sandwich is 6.2mm thick + bottom components for a total of about 9mm thick. Batteries are about 10mm on top of the input board. Back plate on and plugged into USB-C (charging LED on) Why we did this... Portable music Just analog from my phone at the moment. DAC is up next PS The Weight is 12oz or 340g
    16 points
  34. I just put in an application for a two-bedroom townhome apartment a 5 minute walk from my office. I'm excited to move, and even more excited to be able to walk to work every day. Fingers crossed everything works out!
    16 points
  35. Dropped Peter off for his two-week Outward Bound trip, returned our shitty rental car and now sitting in the Delta lounge awaiting our flight to Atlanta which leaves in a little under 12 hours. I like this lounge because they let you mix your own cocktails. If Delta goes out of business next week, you will know why.
    15 points
  36. A family hike just outside Ft. Collins, Co
    15 points
  37. Not really tile exactly, but another fun one was a master bath with Aluminum/acrylic panels by a prominent artist, that I cut and set in the shower. They didn't bother telling me until after I cut and set the three panels, that each panel cost $10,000.
    15 points
  38. That reminds me that I received the second shot of the Pfizer thing past Thursday. Still alive. Penis becoming an annoyance 🤷‍♂️
    15 points
  39. A matching caddy to hold all of my turntable paraphernalia.
    15 points
  40. I dunno, can i post this here? The leather was just an idea - making some matching wood pulls would be cool - maybe when things die down at M&O of course my speaker cables are too short, but going to do my best to get these playing tonite - I found some Romex in the garage..
    15 points
  41. Went over to a friend’s house and made a pair of field coil loudspeakers over the weekend. They sound surprisingly nice!
    15 points
  42. Finished coat rack, with wall fixings hidden underneath the outside hangers
    14 points
  43. Thanks everybody for the birthday wishes. I sat in my sunshine and watched the first half of a cycling race that ended a week ago, and then had dinner out with Claire and my sisters in law, one of whose birthdays was last weekend. The côte de boeuf was huge and the Chateauneuf de Papes was tasty. Good day for sure.
    14 points
  44. Yesterday: New driver in the house.
    14 points
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