ultrabike
Last Activity:
Dec 17, 2018 at 11:04 AM
Joined:
Sep 25, 2015
Messages:
3,490
Likes Received:
7,095
Dislikes Received:
15
Trophy Points:
113
Gender:
Male
Birthday:
Jun 1, 1974 (Age: 44)
Location:
Irvine CA

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ultrabike

Measurbator - Admin, Male, 44, from Irvine CA

Staff Member Friend MZR

@fraggler... Done (custom title). Can't access PMs at the moment for some reason. Nov 7, 2018

ultrabike was last seen:
Dec 17, 2018 at 11:04 AM
    1. ultrabike
      ultrabike
      @fraggler... Done (custom title). Can't access PMs at the moment for some reason.
      1. fraggler
        fraggler
        Thanks! Yeah, getting 403 errors on PMs.
        Nov 7, 2018
        ultrabike likes this.
    2. ultrabike
      ultrabike
      Seems 2i2 DAC outputs are good, both balanced and unbalanced (away from clip). Headamp is mediocre (as heard). More SR1 learning needed.
      1. ultrabike
        ultrabike
        Looking at 100 dB THD+N balanced full scale, and about 98 dB THD+N unbalanced a bit shy of full scale (onset of clip). Headamp is more like 77 dB or so. This correlates well with what I heard. I drove higher end headamps with the 2i2 DAC, and it becomes apparent that the headamp is limiting performance. Somewhat of a haze. Lack of clarity. It's not that bad though considering all that one gets.
        Nov 3, 2018
        westermac, atomicbob and Lyer25 like this.
    3. ultrabike
      ultrabike
      SR1 in the house thx to Jason & Mike. Will do some tests this weekend :)
      1. atomicbob
        atomicbob
        Oct 23, 2018
      2. schiit
        schiit
        Enjoy! (I hope the interface doesn't drive you too crazy.)
        Oct 23, 2018
        ultrabike likes this.
      3. ultrabike
        ultrabike
        Nah. I like that stuff. Like you said. It's BIG. May have to set shop in the garage for this one.
        Oct 23, 2018
    4. ultrabike
      ultrabike
      Oh Shitznits! Prism Sound dScope M1 for $3395 MSRP
      1. View previous comments...
      2. schiit
        schiit
        And I concur, more useful measurements would be welcome.
        Oct 16, 2018
      3. ultrabike
        ultrabike
        You guys are awesome.
        Oct 16, 2018
      4. zerodeefex
        zerodeefex
        I support @ultrabike getting it. He's neurotic enough to go crazy with it.
        Oct 17, 2018
        ultrabike likes this.
    5. ultrabike
      ultrabike
      I love the song "Samidare" and everything Jiraiya represents.
    6. ultrabike
      ultrabike
      1. Thad E Ginathom and Cspirou like this.
      2. Thad E Ginathom
        Thad E Ginathom
        Anything further on this?
        Oct 11, 2018
    7. ultrabike
      ultrabike
      Damit. Down with the flu it seems.
      1. View previous comments...
      2. Ardacer
        Ardacer
        Me2. Get well soon.
        Oct 4, 2018
        ultrabike likes this.
      3. JK47
        JK47
        Just getting over mine, nasty one.
        Oct 4, 2018
        ultrabike likes this.
      4. Jinxy245
        Jinxy245
        That sucks dude...I have a head cold kinda thing & I wanna cut out my sinuses. Feel better.
        Oct 4, 2018
        ultrabike likes this.
    8. Ardacer
      Ardacer
      RS28F-4 + RS180-4? Appears to be almost perfect. Too good to be true. That tweeter is no longer around?
      1. View previous comments...
      2. ultrabike
        ultrabike
        Just gave it a try: crossing the three tweeters. It is possible but I needed 3rd order all over, and not feeling confident about it. Proly best to keep it RST28F-4 + RS180-4, or if 3-way go for the 2" midrange.
        Sep 28, 2018
        Ardacer likes this.
      3. ergopower
        ergopower
        How much do you really gain from the ND13FA-4? 16KHz is about it for me, so an RS180-4 & RST28x-4 would be really tempting. 11 litre sealed box for use with subs, and there's a shallow faceplate for the RST28x-4 that's only 3 1/4" tall, so could make a center channel with vertical alignment that's only 12" tall. Avoids the comb filtering of an MTM center
        Nov 15, 2018
      4. ultrabike
        ultrabike
        It's not high frequency extension what you gain with the ND13FA-4. Is dispersion characteristics. A larger sweet spot (45 degree +) and a more omnidirectional response all the way to 16 kHz. In general, I don't like MTM configurations. But for center channels and practical considerations, sometimes it can't be helped.
        Nov 15, 2018
        ergopower likes this.
    9. ultrabike
      ultrabike
      Man, that RS180-4 driver is all kinds of awesome in a 32 lt. No need for a sub with that. Salivating on an Amiga like build.
      1. View previous comments...
      2. ultrabike
        ultrabike
        Yes. The DX25 can produce SPL down to a 1.5 kHz, but it is not recommended perhaps due to distortion and maybe resonant impedance. I did look at the RST28F-4 and it is the top contender for a 2-way design. It is not straight forward. The RS180-4 almost begs for a 3-way design with an RS52AN (ZDT3.5). But that would require some distance for driver integration. Still thinking about this.
        Sep 27, 2018
      3. ultrabike
        ultrabike
        All that aside, I took a look at what can be done with an RS180-8 vs. an RS180-4. I like the RS180-4 a lot more than the RS180-8. It has lower compliance volume and can go down to 26-29 Hz with the COTS enclosure by Parts-Express cleanly. It fits like a globe and an incredible deal.
        Sep 27, 2018
      4. ultrabike
        ultrabike
        Again. I agree with @Ardacer that the new RST28F-4 is the way to go for a 2-way design. With all the compromises, that and switching to the RS180-4 with some slight crossover modifications would likely yield a small step over the Amiga and Core 2-way. I like that better than the TRS-80. And it may integrate and play better than even the ZDT3.5. Hell, I'm actually thinking of 3-way with RST28F-4 + TD20F-4!
        Sep 27, 2018
        Ardacer likes this.
    10. ultrabike
      ultrabike
      Man, I guess me and mooncake was not meant to be :(
      1. Wilson likes this.
      2. View previous comments...
      3. fraggler
        fraggler
        I like a bite to two tops for nostalgia's sake since my mother is Chinese and I had them growing up, but old school Asian sweets just aren't my thing.
        Sep 24, 2018
        DigMe likes this.
      4. Lyer25
        Lyer25
        I reverse myself. The lotus seed ones are fucking great and I'm tempted to eat the whole damn cake now.
        Sep 25, 2018
        DigMe likes this.
      5. ultrabike
        ultrabike
        Unfortunately I got coconut with yolk that was too heavy and stink the whole kitchen, and a mixed nuts one that tasted like tightly packed fried rice.
        Sep 25, 2018
        DigMe likes this.
    11. ultrabike
      ultrabike
      Man, no wonder the Overnight Sensation is so awesome, the HiVi B4N has some great specs!
      1. Ardacer, Jeb, fraggler and 3 others like this.
      2. View previous comments...
      3. Serious
        Serious
        I'm using one of the white Aucharm 4" drivers with a whizzer cone because I wanted a slightly bright driver with a whizzer cone for better dispersion. I hope I can improve the driver FR with some coatings. I also want to make it taller and move the driver higher, closer to ear height and use thinner wood panels... I also need to experiment more with damping. Still far from being done, but it already shows promise.
        Sep 17, 2018
        ultrabike likes this.
      4. ultrabike
        ultrabike
        Ran some numbers for the OS. The build works. It has a bit of a bass hump and the extension goes down to about 53 Hz. However, that woofer can go down flat to 36 Hz with a larger enclosure. In fact, the OS seems like a compromise to keep the size small.
        Sep 18, 2018
      5. ultrabike
        ultrabike
        The OS calls for a 4.5 litter enclosure. The optimal is 10.5 litters. That being said, the designer played nice with the port to give a very nice response down to the target 53 Hz corner frequency. Given the size, that is very respectable IMO. The cross-over works well too.
        Sep 18, 2018
        fraggler likes this.
    12. ultrabike
      ultrabike
      Finished my speakers. Their sound is warm and more pin point. The opposite of an omni-directional. Nice sound.
      1. View previous comments...
      2. Ardacer
        Ardacer
        They look and measure really nice. You might kill that very small 300 hz resonance, if it bothers you at all, with a tiny bit of extra bracing and stuffing, I think, otherwise looks great :)
        Sep 10, 2018
      3. ultrabike
        ultrabike
        Yup. Not messing around with them anymore. Will update the posts with more design details and measurements. It was great. These were not from a kit. I build them all the way from scratch: boxes, cross-overs, driver selection.
        Sep 10, 2018
      4. Ardacer
        Ardacer
        It's really an amazing experience :)
        Sep 10, 2018
    13. ultrabike
      ultrabike
      Also. Started on porting Keil CM6631/2A to SDCC. Not sure what will come out or when. Also interested in the TMS320C5535 EVM.
      1. ultrabike
        ultrabike
        The deal is the C5535 is cheaper than the CM6631A and can do a lot more.
        Sep 4, 2018
    14. ultrabike
      ultrabike
      Working my way through finishing my DIY nano-speakers. Will update probably in a week with results and maybe some reorg on the thread.
      1. philipmorgan likes this.
    15. ultrabike
      1. famish99, SoupRKnowva and rlow like this.
      2. View previous comments...
      3. ultrabike
        ultrabike
        The big deal is, if AD does this and handles it as most other random companies handle SPDIF, that would be sweet for the DIY folks... As long as one stays with AD, which may be a bit not-so-sweet. Time will say.
        Aug 15, 2018
      4. rtaylor76
        rtaylor76
        This is why I use a Pi and bypass USB and go straight I2S to S/PDIF.
        Aug 15, 2018
        Biodegraded and ultrabike like this.
      5. ultrabike
        ultrabike
        I didn't know, but USB to I2S is lame. Not because it has to be lame, but because it seems the conditions all around were such that it became lame.
        Aug 15, 2018
    16. ultrabike
      ultrabike
      Just came back from vac. Little Stomach Sic. Measurebator Chi-Fi stuff came in. Nice. Need rest.
    17. ultrabike
      ultrabike
      1. rtaylor76, Torq and philipmorgan like this.
      2. View previous comments...
      3. ultrabike
        ultrabike
        I know. It's for a cheap balanced/unbalanced deal to help with the 2i2. No need to spend big bucks on something that I know is compromised already. And if the supply works well, maybe it can be used for other better things.
        Aug 2, 2018
        Ringingears likes this.
      4. rtaylor76
        rtaylor76
        Get one medical rated. This looks like decent line regulation specs.
        Aug 2, 2018
      5. Ardacer
        Ardacer
        Coils were very whiney, regulation was worse than spec. Can't remember which one, 12v 8.5 amps or so. Can tell you exactly when I get home
        Aug 3, 2018
    18. ultrabike
      1. monacelli and Vtory like this.
      2. View previous comments...
      3. ultrabike
        ultrabike
        I'm just another rando. I don't think Cirrus is going to care about my face palming exercise here. But facts are facts. I'm sure those guys have competent engineers. I just don't know WTF happened there.
        Aug 1, 2018
      4. Wilson
        Wilson
        Aug 1, 2018
        ultrabike likes this.
      5. Friday
        Friday
        Here's another trigger
        Analog recording: 24-bit
        Aug 1, 2018
        ultrabike likes this.
    19. ultrabike
      ultrabike
      Man. I just finished fixing my rear bumper. Paint, clear coat, polishing and all. Hard work for "better than nothing" results. *sigh*
      1. View previous comments...
      2. ultrabike
        ultrabike
        Yes. We'll see how things look like again tomorrow in broad day light. May go ahead and do more coats later. Tired for now.
        Jul 23, 2018
      3. ultrabike
        ultrabike
        The bondo work and the sanding IMO is good.
        Jul 23, 2018
      4. ultrabike
        ultrabike
        Ordered more paint (2x more). And a different clear coat brand with better reviews. We'll see.
        Jul 23, 2018
        JK47 likes this.
    20. ultrabike
      ultrabike
      Man, now I really want an RME ADI-2 Pro FS. Fuck you guys.
      1. Torq
        Torq
        I'm wishing they'd do another run of the Pro AE (black) version, but with the FS update ...
        Jul 16, 2018
      2. ultrabike
        ultrabike
        Yup. It's an awesome device. Specs are phenomenal. It would not be a 2i2 complete upgrade due to the lack of mic pre-amps and phantom. But it's a hell of an interface. Measurement instrument grade.
        Jul 16, 2018
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  • About

    Gender:
    Male
    Birthday:
    Jun 1, 1974 (Age: 44)
    Location:
    Irvine CA