Ultimate Ears Reference Monitor custom (UERM)

Discussion in 'IEM Measurements - La Cenric's IEM Playhouse' started by La Cenric, Jun 24, 2017.

  1. La Cenric

    La Cenric Friend

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    Foreword: Needs no introduction but I'll do it anways. The UERM is the predecessor to UE's UERR and presents a brighter (and some would say more accurate) take on neutral. Even after its discontinuation, it has continued to be SBAF's preferred in-ear reference.

    Frequency Response

    FR (CM).png

    Impulse

    Impulse (L).png Impulse (R).png

    CSD

    CSD (L).png CSD (R).png

    THD

    THD (L).png THD (R).png
    Analysis:
    • Apart from its neutrality, the UERM is characterised by its 9k peak (repeatable on multiple couplers, not an artifact of resonance) which boosts the airiness of the sound and the perceived top-end extension. Due to the effects of insertion depth, take the extension shown on FR with a grain of salt.
    • Relatively clean decay on CSD. Fast too. Nothing much to report.
    • Right channel THD measuring slightly higher than left for some reason. Will need to play around with it again. Third order distortions are pretty run-of-the-mill for BA systems.
     
    Last edited: Jun 29, 2017
  2. La Cenric

    La Cenric Friend

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    Updated the first post with proper writeups.

    Impedance Changes
    Impedance.png

    w/ Linum Bax (1.5ohms)
    VitesseBaX.png
    Notes:
    • Very sensitive to impedance changes. Huge swings in both the bass regions and in the treble.
    • Increasing the impedance of the system (OI, cable etc.) may help those who find the UERM harsh or overly bright. But a lot of fine tuning is required due to the UERM's wonky impedance curve.
    • Using the Linum BaX is a sweet spot for me as using a standard cable made the UERM almost fatiguing at times. The BaX brought the UERM's treble down to manageable levels for my ears.
     

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