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Posts posted by deepthought

  1. Ze blurb 

    " Acoustid to listen to your songs and find matches even when they have no information at all, but also takes advantage of existing file information to ensure you get the best album match. SongKong uses our own dedicated JThink Music Server regularly updated from the MusicBrainz and Discogs databases giving you more accurate matches, faster."

    It took me SOngkong 12hours to go through my entire collection (lots of tracks) but it certainly improved my experience.

    • Like 1
  2. Item Condition: Good - 1 used lightly. One out of its bag and others still in bags
    Shipping Options: Shipping is included in price.
    Suburb or Town: Brisbane North
    State: QLD
    Payment Method: Paypal as a friend
    Reason for selling: NLR

    Further information:


     Up for grabs X4 1.2m Ethernet cables. These are used to run connections between patch panels in Datacentres. Theses U/UTP cables have 10GX certification which ensures a very high resistance to  EMI/ RFI and Alien Crosstalk. A good short length for small spaces too.








  3. Item Condition: Excellent
    Shipping Options: Shipping is included in price.
    Suburb or Town: Brisbane Northside
    State: QLD
    Payment Method: Paypal as a friend only
    Reason for selling: NLR

    Further information:


     The  USBridge Signature Player, a small form streamer with a very high quality USB output. 
    Includes an SD Card with the latest version of  DietPI with the Allo interface. Connect to an ethernet cable, start it up and then go to  http://dietpi.local to start using it. if you are using Roon, simply select Roon in the list and then find the streamer in Roon - and away you go.


    https://darko.audio/2020/06/allos-usbridge-signature-review/ "Flexible, reasonably priced and sounds excellent. What’s not to like?..."


    * WIFI dongle is not included in package. Ethernet is my recommendation for a stable connection in most cases.







  4. 46 minutes ago, dcathro said:

    Cannot see anything new here, Hermholtz resonators have been in use as an active sound absorber for studios for many decades.


    The can be tuned for almost any frequency and Q (think narrow or broad spectrum).

    Nothing new to learn in the world of acoustics then. Sorry for wasting everyone's time.

  5. Item Condition: Very good.
    Shipping Options: Shipping is included in price.
    Suburb or Town: Birsbane North
    State: QLD
    Payment Method: Paypal as a friend
    Reason for selling: NLR

    Further information:


    The illustrious SOTM200. A bespoke mini computer that does one thing and one thing  really well - stream hi-res audio via ethernet and output in via USB. Roon compliant (I had to update the firmware recently as the new Roon 1.8 update seemed to make Roon think that the SOTM200 wasn't compatible any more ;) ). Also has it's own bespoke operating system - connect it to your network and the device appears in your web browser so you can access the settings. Its deceptively simple.

    A massive step up from a Laptop or PC based music output. 

    The SOTM200 has a very clean sound with great balance of detail / musicality.




    All pricing includes postage with tracking. SOTM200 still has all the original packaging and the original power supply ( A small switch mode power supply).



    A good review that also highlights the benefits from using a well filtered PSU with good current reserves with the SOTM units - https://audiobacon.net/2017/03/23/sotm-sms-200-mbps-d2s-review/



    Price is for UNIT only. There is a generic power supply in the box. 






    • Like 2
  6. 2 hours ago, kelossus said:

    Ok so swapping the preamp made all the world of difference. The music has life and drive once again. The Coincident preamp has 13db of gain so a decent amount more. The Pass Labs can now certainly drive the speakers at volume but it massively lacks bass impact and authority compared to the Krell.

    I always found the bass in my the XA100.5 that I owned, then subsequently the XA30.8 to be the weakest point of their sound. Subjectively it's a very pleasant, fat bass which I think would be favoured by tube lovers and may be where a lot of the tube-amp comparisons spring from. I listen to a wide variety of music, and a good bit of electronic stuff so I was attracted to the faster, tighter bass from the XA25. I think damping factor (or output impedance if you want to look at it from the flip side) are the main factors here.

  7. 1 hour ago, Jack Goff said:

    In your opinion they are excellent. Luckily not everyone has to have “your” taste. Or mine for that matter. But please continue to offer nothing constructive other than sarcasm and your opinion.


    Ok then let’s make it an MGB. 
    Horrible car to drive but still appealing to those that love them. People buy what they want/love with all the foibles that come with them. I don’t suspect you’d go to a car club and tell them all the things their car was missing and what was better with new technology? Maybe you would 🤷‍♂️

    Wow take a chill pill. I didn't read any sarcasm in that response and I thought it was a poor comparison, not to mention we're veering off topic. Must be that dodgy MGB steering.

    • Like 1
    • Haha 2
  8. 7 minutes ago, kelossus said:

    I do have a line on a ME1500 but it requires a slight modification to accept preamps with higher output impedances. Whilst I am sure ME preamps are great I would like the ability to try other bits and pieces. I love ME gear, I really do but too much of it can be a little sterile in my past experiences.


    I am only running the one preamp at the moment. I didn't end up plugging the other pre into the BHK.

    ME1500 to the bass drivers and Pass Labs to the rest??

    • Like 1
    • Haha 1
  9. 2 hours ago, Eggcup the Dafter said:

    @davewantsmoore has already pointed out that we don't have any large phase angles here, assuming the given measurements are correct for this sample. Those specs surprised me given what I've heard about the Sovereigns.

    The supersymmetry design in the Pass Lab amp is referred to elsewhere as a "special subset of bridging". I can't really tell if that is true or relevant but it's worth mentioning for those who can, I guess.

    No, sorry but that's misquote:https://www.passlabs.com/wp-content/uploads/2020/05/x3_om.pdf

    "The supersymmetric amplifier is a special subset of balanced amplifiers, unique and covered by U.S. patent."

    The Pass Labs stuff can run quite well on 2ohms -https://www.stereophile.com/content/pass-labs-xa305-power-amplifier-measurements

    I was actually was running my XA25 on 1.5ohms for a while. Not knowing that one of the bypassed capacitors had shorted in my midrange driver on one side. I worked it out as it was cutting the one channel when I was driving at about 95dB+. Otherwise, it worked just fine at less anti-social volumes.

  10. Just now, kelossus said:

    Yeah minimum impedance is known but does it have a nasty phase angle at 50hz further complicating things? That's what is unknown.

    I must be half asleep. Of course you've seen that data, you contributed to the thread. 😬

    DATs also gives you a phase angle sweep. If I wasn't working from home, and we weren't on lockdown I'd give you the loan of mine.

    • Like 1
  11. Just now, sakabatou said:

    I'll leave that for someone who knows about tubes. I don't recall noticing, but I wasn't looking for a gain difference

    I admit I wasn't listening for gain either. I was just floored by how good the Telefunken diamond 7DJ8's sounded when I put them in.......

  12. 1 minute ago, stereo coffee said:

    Yes because  a   Audio Precision SYS2722 system, is not a CD ... is it ? rather it is a audio analyzer, far removed from what consumer line level audio provides with the CD format. 

    Are you here to help Chris or just prove me wrong? 

    • Like 4
  13. Just now, kelossus said:

    Outside of anecdotal accounts of the speakers being hard to drive there is no measurements to substantiate any claim. I have spent hours and hours combing the forums and the net about the Sovereigns and Duntech's in general. I have never seen any kind of measurement which does seem odd as Dunlavy was so focused on them.


    I have a feeling that what I hear is a combination of not enough gain and the Pass Labs not being able to grip the speakers like the Krell did.


    The Krells volume control went to 150. Very rarely would I exceed 100, on the 1% of quiet tracks I would reach 110-115. That may mean nothing but I had the same problem with a Vitus Integrated running into very inefficient speakers, I could turn the amp all the way up. It may seem hard for people to understand how you can play at volume but when you have a large speaker capable of playing at volume with out compression it's very easy to get carried away. For me at least.

    A DAT's speaker measurement device could run a sweep of your speaker's impedance in a few minutes and you'd know for sure ;)

  14. 13 minutes ago, kelossus said:

    That was my first feeling. The Krell FBI had 36 db as an integrated and it took command of the Duntech's. What I hear now is lack of drive and authority to the overall sound. Is it gain or a lack of current? I don't know and I'm not experienced enough or technically minded to trouble shoot.


    It's easy for me to draw the wrong conclusion.

    Another thought is, if you have another preamp laying around with a known amount of gain, add it into the system. Set it to max' gain then increase the gain on BHK.  If you are able to get the desired amount of SPL out of the speakers then you're looking at a system gain issue. 

    • Like 2
  15. 11 minutes ago, stereo coffee said:

    But consumer audio sources don't deliver 2v they only deliver consumer line level which is shown here, stated in RMS  and shown in light blue using audacity.  



    Screenshot from 2020-07-04 20-05-59.png

    Screenshot from 2021-02-17 16-16-39.png

    Really? https://www.stereophile.com/content/holoaudio-spring-kitsuné-tuned-edition-level-3-da-processor-measurements



  16. Your issue probably isn't your amp not having enough power. Your issue is nett gain in your system. The BHK only has 9.3dB of gain if you use both balanced inputs and outputs. If you use either unbalanced input or output then that drops to about 3.7dB. f you are using unbalanced outputs from your DirectStream DAC then you're only getting 1.44V RMS. Not sure what the output of your Phono stage is and what the sensitivity of your phono preamp is.  The Pass Labs has a 26dB gain which is not high, not low.

    So if you're using unbalanced in your chain and you're only starting out with a low voltage (lower than the sort of standard 2V), which is not being multiplied a great deal through the preamp and the power amp. If you had horn loaded, high sensitivity speakers then this low gain situation would be great but your speakers aren't high sensitivity. 

    If you are streaming into the DirectStream DAC and you have the attenuation ON then turn it off. If you are using something like Roon and you have headroom management on in DSP then try turning it off. Keep the Directstream on 99 or 100 volume.

    Ideally you want about 35dB of gain in your system. And that's based on an assumption of a starting voltage of about 2V from your source.


    Now if you're running balanced all the way then ignore what I'm saying because you should be getting a decent amount of gain.

    Best test is to plug something of a known output into your Pass Labs. Something like a portable audio player, though with a volume control. Use a 3.5mm to RCA cable and set the volume at 0 on the player. Play some music and gradually increase the gain. If your Pass Labs start to get very loud as you increase the volume then you know your issue is with system gain. 


    • Like 2
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