Ferrum OOR - headphone amplifier with a soul ?
Jul 6, 2021 at 9:30 AM Thread Starter Post #1 of 3,846

godmax

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After their first product the HYPSOS power supply, it seems like the HEM brand will also enter the headphone amplifier market soon:

Ferrum OOR

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OOR_front.jpg

OOR_rear.jpg

  • Gain (dB): balanced -4 dB, + 6dB, +16 dB / single ended -10 dB, 0 dB, 10 dB
  • Operation: Fully balanced, proprietary discrete power amp technology
  • Inputs: XLR, RCA, 2.5 mm DC connector centre positive, proprietary 4-pin DC connector
  • Outputs: Balanced 4-pin XLR, 6.35 mm jack
  • Frequency Response: 20 Hz – 100 kHz 0.1 dB
  • Output Power Single Ended: 400 mW into 300 Ω, 2 W into 60 Ω
  • Output Power Balanced: 1.600 mW into 300 Ω, 8 W into 60 Ω
  • THD + Noise: TBA
  • Input Impedance: 94 kΩ
  • Output Impedance Single Ended: 22 Ω on pre-amp
  • Output Impedance Balanced: 44 Ω on pre-amp
  • Output headphones Impedance: < 0.3 Ω
  • Power Consumption: Idle <15 W
  • Power Adapter: 100/240 V AC to 22-30 V DC
  • Dimension (W x D x H) (In/cm): 8.6 x 8.1 x 2.0 inch / 21.7 x 20.6 x 5 cm
  • Weight (kg/lbs): 1.8 kg / 3.97 LBS
  • Price: 1.995 EUR/USD
ETA:

August 10th 2021​

Design and value proposition looks very promising to me! - What do you think?
 
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Jul 8, 2021 at 5:39 PM Post #2 of 3,846
Curious how that one will perform vs GSX-mini and Wells Milo.

Looks promising. Especially with the external power supply
 
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Jul 9, 2021 at 9:22 AM Post #3 of 3,846
Wow 8 W into 60 ohm….that’s a lot of juice
 
Jul 9, 2021 at 9:58 AM Post #4 of 3,846
Curious how that one will perform vs GSX-mini and Wells Milo.
... at least for the GS-X mini comparison I might have a comparative impression incoming in some weeks, if everything works out :sunglasses:
Wow 8 W into 60 ohm….that’s a lot of juice
yea, seems like I would need to add a more power hungry headphone in my collection to really make proper use of such a beast :)
 
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Sep 9, 2021 at 11:16 PM Post #8 of 3,846
Where are internal shots of this amplifier. Seems like a good competitor to the VOLOT.
 
Sep 10, 2021 at 12:51 AM Post #10 of 3,846
Sep 18, 2021 at 3:49 AM Post #11 of 3,846
Sep 18, 2021 at 6:47 AM Post #12 of 3,846
https://www.hifistatement.net/tests/item/3140-ferrum-oor?start=0

Article is in German but translated really well with Google Translate. I am considering the Hypsos + Oor combo as we have a local dealer that can bring the product over.
Considering all the competitors I think it is well overpriced. The manufacturer has the know how based on Mytek headphone amp section which is really good and very clean but still this is different product using different technology.
 
Sep 18, 2021 at 1:02 PM Post #13 of 3,846
Considering all the competitors I think it is well overpriced. The manufacturer has the know how based on Mytek headphone amp section which is really good and very clean but still this is different product using different technology.
If it competes with Bakoon 13r or the new Enleum in Susvara performance then it’s a good price. If it is on par in performance with the Volot, the better form factor is more attractive.
 
Sep 20, 2021 at 9:30 AM Post #15 of 3,846
currently also thinking about getting that combo for driving Susvara...
Will decide in the next days...
 

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