Ferrum Audio Oor + Hypsos Impressions and tidbits

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by jexby, Dec 15, 2021.

  1. jexby

    jexby Posole Prince

    Staff Member Friend JK47
    Joined:
    Sep 28, 2015
    Likes Received:
    6,838
    Trophy Points:
    113
    Location:
    gone
    • Like / Agree Like / Agree x 10
    • Epic Epic x 2
    • List
  2. jexby

    jexby Posole Prince

    Staff Member Friend JK47
    Joined:
    Sep 28, 2015
    Likes Received:
    6,838
    Trophy Points:
    113
    Location:
    gone
    Let's jump into this Prodigious Product Pair from Poland shall we?

    There are many professional reviews elsewhere, these contributions pale.
    This is more about synergy, interesting feature findings and flexibility provided by Oor.

    Hypsos:
    wow, firmware built into a power supply that configures it for dozens of devices (not simultaneously)? neat.
    you want 0.1V increments (up or down) from Setting X for a component? go for it.
    apparently anything from 22V to 30V into the Oor makes subtle changes to softness or edginess. not tried yet.
    can be paired with Apple Remotes.
    Has a trigger function (input or output) to turn on the downstream device. haven't tested.
    LED lights have custom settings: off, 0-10.
    Display has auto off (seconds to minute) setting
    Firmware updates can be done via microUSB on back. updater app for macOS available on web site.

    Oor:
    Esthetics spot on with Holo Audio Spring3 KTE.
    how is this DEAD quiet with no AIR or HISS with CA Solaris 2020? (SE jack, Low Gain)
    how can Oor also power Susvara (very well!) in High Gain with great technical qualities from bass to treble.
    the high 6V out of Spring3 XLR helps in this regard.
    amp gets warm to the touch, never hot. I do not stack these separates.

    3 gain levels of Oor make it amazingly flexible IMO.
    ZMF VC Blackwood on Low or Medium gain is lively, taught, clear, precise.
    Layering is good. Stage width is very good.
    not 2D, but 3D - hearing the room acoustics happens.
    tube-like depth? nah, not like EC amps.

    Cymbals, high hats, drum ticks- all sound spooky realistic. no haze, no shiney glare.
    high quality micro details delivered easily in space with no brittleness, no sharp edges that cut.
    warm? no.
    rolled? no.
    neutral? yes.
    harsh? never

    All of the above products not yet burned in. (except for ZMF VC Blackwood).
    too soon impression claim: Hypsos + Oor are in summit DSHA3F territory for SS headphone amps.
    (may be edited in future to protect the innocent)
     
    • Like / Agree Like / Agree x 18
    • List
    Last edited: Dec 15, 2021
  3. purr1n

    purr1n Super Friend

    Staff Member Friend BWC
    Joined:
    Sep 24, 2015
    Likes Received:
    75,503
    Trophy Points:
    113
    Location:
    Padre Island CC TX
    Is the power supply required with the Oor? If not, how does the Oor perform alone?
     
    • Like / Agree Like / Agree x 6
    • List
  4. jexby

    jexby Posole Prince

    Staff Member Friend JK47
    Joined:
    Sep 28, 2015
    Likes Received:
    6,838
    Trophy Points:
    113
    Location:
    gone
    The Hypsos power supply is not required. Oor ships with a power brick and cable which provides complete functionality.
    Reports elsewhere indicate that Oor without Hypsos delivers "less" of what it's great at: clarity, precision, dynamics, stage width, etc.
    am suspecting "how much % less" is going to be transducer dependent.

    IEMs Oor and NO Hypsos: In limited listening with CA Solaris 2020 on the Oor without Hypsos, I did not detect any major losses in quality but this was in under 1hour, and listening to a handful of songs / genres.
    More investigation needed.

    Susvara / ZMF VC Blackwood to Oor and NO Hypsos:
    TBD
    (will edit here perhaps over weekend)
     
    • Like / Agree Like / Agree x 4
    • List
  5. pure5152

    pure5152 Friend

    Friend
    Joined:
    Sep 29, 2018
    Likes Received:
    1,377
    Trophy Points:
    93
    Location:
    Irvine, CA
    Hate to be that guy, but would love to hear if you have further thoughts on this if you have the time!
     
    • Like / Agree Like / Agree x 2
    • List
  6. jexby

    jexby Posole Prince

    Staff Member Friend JK47
    Joined:
    Sep 28, 2015
    Likes Received:
    6,838
    Trophy Points:
    113
    Location:
    gone
    it’s near impossible these days to sit with audio equipment for consecutive hours. What follows is by no means gospel and comes from an hour of back and forth, because switching power supplies is a PITA.

    was everything warmed up? I believe so.
    was volume match good by leaving the vol pot in same position? I believe so.
    do I have measurements of V / A coming out of the switcher? no.
    can I see the output power (V / A) coming from Hypsos during playback? yes.
    do I have bat ears like Hands? no.

    Here was the config:
    Roon (no upsampling) —> Spring3 KTE USB —> XLR —> Oor —> ZMF Verite Closed African Blackwood (XLR silver coated copper cable)

    Spring3 KTE USB module is awesome, have no reservations using for critical listening.
    Oor on Lowest gain with VC to allow range on pot, loud listening starts at 10am on the pot. scales up nicely to 12n.
    One reason for low gain may be the 6V (spec sheet) coming from Spring3 KTE XLR outputs into Oor.

    Subjective notes below in trying to identify differences in power supply.

    Oor with Hypsos power supply and ZMF VC:
    very good staging width, layering
    snap of drums is good, not overly sharp or hard
    sub bass goes low with good pull
    easy to follow bass guitar lines, instrument separation
    cymbals have shimmer and nice airy float
    an up front presentation, not laid back. never slow.
    honestly VC sounds as great as possible on Oor as an SS amp,
    on par with what I recollect from DSHA3F.

    Oor with switcher power supply and ZMF VC:

    no huge drop offs in quality from above.
    bass a bit less tight, sub bass slightly less enveloping
    staging width close to the same, yet can’t “hear the room” as easily
    presentation maybe even more up front
    perhaps slight decrease in clarity (cymbal shimmer) but microdynamics remain
    no reduction in speed or detailing
    tone and timbre unchanged

    sorry can’t dive into finding the best dynamic swings of song X vs song Y and see if the jumps make big deltas at the power supply level.

    In First Summary: folks with ZMF cans should feel comfortable first buying an Oor without the Hypsos power supply to see if sonic strengths match up with rig synergy.
    for that last 5-8.78% of improvement with Hypsos it’s YMMV to determine if it warrants the spend.

    With the open, transparent and neutral Susvara to me it seems more sensitive to Ferrum power, and using Oor WITHOUT the Hypsos power supply has obvious differences.

    The Susvara on Oor with no Hypsos becomes “shouty” with an upfront presentation, vocals in your face.
    with the vol pot not having moved, the switcher power supply sounded louder.
    there is fatigue in the treble, seemingly sharper and brighter.
    layering and presentation collapse inward some, not as spacious.

    Putting the Hypsos (24V) back into Oor, and vol pot not changing-
    Susvara returned to greatness with more openness, width, solidity and a step back in presentation with better layering, no longer shouty.

    In Second Summary: would heartily recommend the Hypsos to bring out the best in TOTL Susvara + Oor.
    Unsure if Hypsos would necessarily translate with other planars or not.

    HTH
     
    • Like / Agree Like / Agree x 17
    • Epic Epic x 4
    • List
  7. jexby

    jexby Posole Prince

    Staff Member Friend JK47
    Joined:
    Sep 28, 2015
    Likes Received:
    6,838
    Trophy Points:
    113
    Location:
    gone
    • Like / Agree Like / Agree x 2
    • List
  8. Josh Schor

    Josh Schor Friend

    Friend
    Joined:
    Jul 13, 2020
    Likes Received:
    129
    Trophy Points:
    43
    Location:
    Ann Arbor Mi
    Glorius reviews, I have a Studio B with Jenson cap upgrade and tkd volume pot, Linlai global E 300 B tubes sound wonderful do you have any experience to compare them? Thats a lot to asl I know just amazed with the power supply and how you can adjust it for different sounds and HP.
    best
     

Share This Page