Jump to content

Beefy

High Rollers
 View Profile  See their activity

  • Posts

    2,281

  • Joined

  • Days Won

    2

 Content Type 

Posts posted by Beefy

  1. Audeze CRBN

    in Headphones

    Posted

    17 minutes ago, Juansan2 said:

    What exactly is the advantage of embedding graphene into the membrane? Does anyone have any idea?

    Reading the marketing spiel, the theory is that graphite and carbon nanotubes have exceptionally high electrical conductivity. Supposedly makes the bias voltage across the membrane much more spatially uniform. And at a micron-scale thickness, carbon-based materials are extremely robust to the mechanical environment, where a sputtered metal film balacing equivalent thickness and conductivity might degrade over time.

    • Like 2

  6. The Knuckledragger 3rd Memorial Slow Forum Post

    in Off Topic

    Posted · Edited by Beefy
    Type good, stupid

    The problem I have with that video is how the questions are loaded.

    Arabic numerals is the official and colloquial name of the numbers we use. Lemaitre's theory was officially called the hypothesis of the primeval atom and colloquially known as the big bang theory. By referring to it only as his theory of creation is quite silly.

    Still, I bet the 'Republicans' and 'Democrats' they polled for that video are really just 'idiots' and 'idiots'.

    • Like 2

  7. Audeze CRBN

    in Headphones

    Posted

    5 minutes ago, catscratch said:

    Regarding "progress..." ...

    I think that was one of the things that struck me when coming back from a long absence, that electrostats seem to have stood completely still, while planars and dynamics have come forward in leaps and bounds. I don't have enough experience to judge whether they have yet reached the heights of the best stats, but the different rates of progress are quite stark.

    In any case, yeah, the more options and competition, the better.

    • Like 1

  8. Audeze CRBN

    in Headphones

    Posted

    1 hour ago, catscratch said:

    HD650 has a slight resonance around 5k together with a very small peak. But we're talking a few db at most.

    Oh totally, I was mostly being facetious. But even then, a couple dB across several kHz is definitely in the audible range.

     

    19 minutes ago, padam said:

    I would have expected a heavier SR-009 tank-like build at this price (even though that is still plagued by issues)

    Indeed! What struck me is that the specs claim these only weigh 300g. That's half the weight of the other mainstream Audeze. Do the magnets account for that much weight loss, or have they been able to trim a whole heap of fat from the frame and housing?

    • Like 1

  9. Audeze CRBN

    in Headphones

    Posted

    I've never once listened to the HD650 and thought, "You know what? I wish these had less treble energy above 4 kHz"

    Still the technicalities of an electrostatic with a crowd-pleasing dynamic tuning could be really interesting... *me checks price*... to read about when someone else buys them.

    • Like 3

  10. goldenreference low voltage power supply

    in Do It Yourself

    Posted

    41 minutes ago, ShortBtwnHdset said:

    Thanks, for all who posted!  Looking at specs on these electrolytics, its surprising how few hours their rated at!😲

    That is rated lifespan at the maximum temperature, ripple current and voltage. Pretty insane conditions for most audio gear. Lifespan increases dramatically as temperature and ripple current fall to more reasonable levels.

    • Like 1

  13. KGSSHV Carbon Build Thread

    in Do It Yourself

    Posted

    2 hours ago, JoaMat said:

    Here are the connectors disassembled.

    I would have prefer Teflon over 3D printed. I haven’t figured out how to mill it out though, but  I managed to 3D print something usable.

    Right, so still a clamping design which I imagine makes mounting a lot easier, but you do solder the pins after inserting them. Got it.

     

    1 hour ago, mwl168 said:

    This is what I used for the socket pins: https://www.ebay.com/itm/143522733990?hash=item216a9f1fa6:g:chUAAOSwga9eN~R4 

    They are intended for tube sockets but work very well for Stax sockets too.

    Yep, those tulip pins were the ones used in the jacks I got from luvdunhill about 10 years ago. A bitch to solder, but they haven't let me down yet!

     

    48 minutes ago, chinsettawong said:

    This is my version - 3D printed using ABS filament.

    That looks like a direct 3D print of the milled version? Seems to work beautifully with the tulip pins. I imagine you still solder these after assembly?

    *

    My $0.02 if it were me 3D printing these, I'd flip them upside down and put the 'customer facing' surface on the build plate. It would mean you have to use supports around the overhangs, but you'd get a much cleaner/prettier result on the surface you can see.

    I'd also consider using low-warp nylon; if your printer can print ABS and PETG well, chances are it can manage nylon as well, it usually only needs about 250°C on the hotend. The only real difficulty is that you absolutely must keep nylon filament bone dry before and during printing, and use a quality adhesion aid (Magigoo PA is very good on glass and PEI). The real benefit is that nylon will be stronger and more dimensionally stable than both ABS and PETG, and heat resistance should be as good as PETG.

    • Like 2

  14. KGSSHV Carbon Build Thread

    in Do It Yourself

    Posted

    9 hours ago, JoaMat said:

    Thanks for dielectric values of PLA and PETG. Them in picture above are PETG but I’ve also used ABS which also works. I assume you can use PLA as well, but both PETG and ABS melting temperature are a bit higher than for PLA which might be an advantage when soldering wires to contacts.

    Ah, didn't realise you had to solder in situ, that definitely makes PLA difficult. It looked like there was a seam that might represent two parts that 'clamp' the pins in place. But I guess that is probably the subtle layer transition where the bolt head insets end.

    I wonder if there any common pin type that might work clamped between two blocks that are screwed together? Could remove heat from the equation, and make jack production extremely accessible if you can use PLA.

  15. KGSSHV Carbon Build Thread

    in Do It Yourself

    Posted

    5 minutes ago, JoaMat said:

    As most other DIYers I use Teflon Stax connectors with a small PCB. But on below amplifier I use 3D printed connectors with female golden contacts from Neutrik 3 pole XLR. And they seem to work really well.

    Awesome idea. What material do you use? Not that it would seem to matter, I suppose, as long as it is sufficiently strong. A quick Google suggests PLA has a dielectric strength of >30 kV/mm, and PETG is at >45 kV/mm. That's almost as good as Teflon.

  16. Tokyo Olympics

    in Sports Talk

    Posted

    36 minutes ago, n_maher said:

    I think we're largely overstating the risks to the athletes....

    For sure. But I'm also worried about all the caterers, bus drivers, venue workers, etc. And then their families. In a perfect world, they have all had the chance to get vaccinated, but Japan's vaccine rollout has been excruciatingly slow.

    I hope I'm wrong.

  17. Tokyo Olympics

    in Sports Talk

    Posted

    5 hours ago, Craig Sawyers said:

    On the other hand, it is a Covid superspreader event just waiting to happen. Or clearly already happening.

    Rather than a celebration of human excellence, I feel like it is going to become a historical reminder of humanity's hubris. After 18 months of this crap, everyone has started patting themselves on the back for 'beating' the pandemic, thinking that middling vaccination rates and sensitive-but-flawed testing is sufficient. But then you take thousands of people from every corner of the globe, get them all to travel to one place, and put them in a relatively confined space with a deadly virus? But hey, as long as it's good for the economy. Forget my country's team, go Team Economy!

    I really hope I'm wrong.

  19. Get your game on!

    in Games

    Posted

    24 minutes ago, catscratch said:

    Also, rumors are flying about a Quake reboot, which means I should probably get back into Quake at some point so I'm not completely useless when it comes out.

    Awesome, I hadn't heard this. I played a LOT of Quake 1 back in the day, and distinctly remember the soundtrack done by Trent Reznor. It was completely revolutionary at the time.

    The Doom reboot has set a new high bar for game music in the past few years, so hopefully they try and step it up even further with a new Quake.

  21. Megatron Electrostatic Headphone Amplifier

    in Do It Yourself

    Posted · Edited by Beefy

    2 hours ago, orientexpedite said:

    No worries, Thuan has several other accounts, (including thuytn, tranhieu, fls.audio on SBAF and tee8tee4388 on reddit, among many others, no doubt)

    I've seen this person's builds on SBAF and they look spectacular. Extremely unfortunate that they seem to have some issues.

    Oh, and I found your for sale post on Canuck Audio Mart, which has bigger/nicer pictures. I was tempted to put my hand up and give this a shot, but there is *no way* I could find the time and energy to work out that rat's nest of wires!

    (But also, at the same time, so much thought and detail has been put into some aspects. I mean, the ventilation around the power tube bases is really neat, but then to undersize the power caps? SMH)

  24. The State of DACSES

    in Home Source Components

    Posted · Edited by Beefy

    1 hour ago, ktm said:

    Given the large number of DAC and headphone  companies out there,

    a lot more are going to go under. All covid did was speed up the process.

     

    Completely agree. Over on diyaudio, Søren Kristensen (Soekris) said that lead time for the Spartan FPGA he uses in his DACs is up to 53 weeks. Every small business that relies on semiconductors is going to be struggling right now, which just adds to price pressure from the market being flooded by an explosion of inexpensive mass-manufactured gear.

    • Sad 1
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.

  I accept