- Driver: 10mm Sapphire Plated Diaphragm Dynamic Driver + 6mm Annular Planar Magnetic Driver - Impedance: 30Ω+15% (@1kHz) - Sensitivity: 120dB/Vrms (@1kHz) - THD: THD@1kHz≤0.05% - Frequency Response: 7Hz-39kHz - Effective Frequency Response: 20Hz-20kHz (IEC60318-4, 3dB) - Connector PINs...
  2. jude

    Sennheiser IE900 Review, Measurements, & Harman Target Talk

    Sennheiser IE900 Review, Measurements, & Harman Target Talk NOTE: If you can't see the embedded video above, please CLICK HERE to see the video. We listen to, look at, and measure Sennheiser's latest flagship IEM, the Sennheiser IE900. However, before we get to the IE900, we discuss the...
  3. Softears RSV

    Softears RSV

    RSV reference sound tuning 3-way-system with 5BA high efficiency linear phase ANOTHER LEAP FORWARD Based on the success of the company's current flagship RS10, Softears reconsidered some key concepts of the original design. Even though the RS10 holds its ground as a reference in-ear monitor...
  4. HuoYuanJia

    Softears - Discussion & Appreciation

    While preparing my review, I have requested the product descriptions from Softears, so now I have more info to share. (Though to me, Softears is still kind of mysterious and there's a lot I could not figure out.) Anyway, I think it is worth updating the first post. The original post is hidden...
  5. Shabda

    Headphone with bass and air

    Hi All, can anyone think of a headphone with ~ harman 2018 bass but a could amount of air in the highs? i love my shure 1540’s but sometimes i wish they had a bit more air. open backs welcome! Thanks!
  6. mobbaddict

    What's the advantage of multi balanced armatures designs versus singles ones?

    I was looking for concrete information about the advantages of multi balanced armatures designs for IEMs versus single armature ones when I came across this video posted by Knowles, which explains a lot of things: I thought I would share it here since it's very educational. The video contains...
  7. TronII

    A New Curve...

    After learning about speaker orders, in combination with being exposed to some recent threads, I came up with a new idea for developing a compensation curve for circumaural headphones: I call it the "Open Air Response" (OA). In a flat open field, with little to no background noise, (like the...
  8. TronII

    Frequency Response Curves

    I've been looking into frequency response curves and a few things strike me as odd: Why does the ISO 226:2005 equal-loudness contour differ from the free field response by up to 30 dB in the lower frequencies? And, while we're at it: doesn't the concept behind the Harman target seem dubious...
  9. paspro

    Harman - a Samsung Company

    Samsung bought Harman. What a shame. https://www.harman.com/samsung
  10. samvafaei

    Headphones Frequency Response: Challenges & Solutions

    Hello Head-Fiers! We have made a video explaining some of the common issues in making frequency response measurements, and the solutions that we have come up with. These include bass leakage/coupling issues, treble inconsistencies, and target response curves. The purpose of this video is to...