Fostex TH7B measurements & impressions

Discussion in 'Headphone Measurements' started by sorrodje, Feb 25, 2016.

  1. sorrodje

    sorrodje Carla Bruni's other lover - Friend

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    • Fostex TH-7B Stereo Headphones

    • semi-open dynamic
    • 70 Ohms impedance,
    • rated input 23mW
    • frequency response: 20Hz-22kHz,
    • High grade synthetic leather ear pads
    • weight 267g with cable
    • 255g without cable
    • Cable length: 1,2m (with 3.5mm stereo mini-jack) included extension chord 1,5 m with 6,3mm stereo plug

    US price : TH7B ( Japan Import) ~90$ .. TH7BB is ~50$ ( Dunno what's the difference)
    EU Price : 66€


    • Subjective Impressions :
    Light semi open semi on ear headphone. for my ears, it's close to over-ear. More comfortable that I thought. Clamp is spot on . not too strong. Overally the build quality is OK and accorded to the price.

    Sonically speaking, it's surprisingly good. Overally very engaging yet somewhat clean. Punchy but extended lows . Mids are not sacrified but I hear some hardness/shoutiness I'm sensitive to. Good sense of detail and clarity is there , openness is more than OK . I heard the Treble as harsh but not as harsh the measured 8khz treble peak suggests (and I'm allergic to 8 khz). Not a formula one of headphones but highly recommended for those who're after a cheap good headphone for themselves , family or friends.

    the TH7B is soemwhat not that easy to drive though. For people who like it loud and amp will be mandatory. the volume is cranked up close to the max on my laptop while I'm writing and I' usually don't listen that loud.

    Not much isolation from outside noises but leakage are almost inexistant. that's really an interesting point especially at work when you can hear the phone ringing without let know to everybody that you're watching pr0n. uh uh uh

    Will probably try some mods to see If I can smoothen the treble.


     
    Last edited: Feb 26, 2016
  2. sorrodje

    sorrodje Carla Bruni's other lover - Friend

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    FR Left :
    TH7B_FR_L.jpg
    FR Right :
    TH7B_FR_R.jpg

    Distorsion Left:
    TH7_Distorsion_L.jpg

    Distorsion Right:
    TH7_Distorsion_R.jpg

    CSD Left:
    TH7B_Waterfall_L.jpg

    CSD Right:
    TH7B_Waterfall_R.jpg

    Spectrogram Left:
    TH7B_Spectrogram_L.jpg

    Spectrogram Right:
    TH7B_Spectrogram_R.jpg
     
    Last edited: Feb 25, 2016
    Lyander and ultrabike like this.
  3. purr1n

    purr1n Finding his inner redneck

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    Looks like FR was tuned to be similar to X00, but the distortion!
     
  4. spoony

    spoony Spooky

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    Doesn't look too bad. Are you sure you measured @ ~90 dB?, that looks more like a > 100 dB distortion.
     
  5. richard51

    richard51 Mr. Sorbothane

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    I had one and no problem with harsh highs but i had put sorbothane on it....;) And i am OK totally with you that this headphone is no brainer for the price and i think very musical for my ears.... the difference between the TH-7B and TH-7BB is only cosmetical and about colors...To give you my impression they are not far behind my Stax SR-5 +sorbothane, for sure their rendering of the natural instrument musical timbre is less natural than the stax ( my Stax are now my first listening can ) , they are also not far behind my he 400 with sorb. also...In a word , if you are poor and dont want to pay much, the good news is that they are almost perfect for their pricing and probably superior to many others... best regards to all
     
    Last edited: Feb 25, 2016
  6. sorrodje

    sorrodje Carla Bruni's other lover - Friend

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    Honestly I'm not sure. REW uses the custom calibration given for my Mini DSP UMIK mic so logically , the 90db should be accurate. take it with a grain of salt though. I can try lower volumes to see what happens.

    This Semi closed Cheap headphone distorts less than a bunch of uber-expensive so called "Hi End" headphones though... See Pioneer Master 1 :p
     
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  7. spoony

    spoony Spooky

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    Yeah, it should be accurate.
     
  8. Mayor D

    Mayor D Rando

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    These are the only phones i have that i cant improve with equalization. Does anyone know of some better open cans with a similar FR?
     
  9. ultrabike

    ultrabike Measurbator - Admin

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    I'm not familiar with the Mini DSP UMIK, but there is mic calibration (using the file supplied), and there is SPL calibration (see REW manual about details on that one). To calibrate SPL one might need an SPL meter and calibrate REW with speakers. That's what I did. Though one should take my calibration also with a grain a salt.

    I dunno if this is of any help, but hopefully it is.

    BTW, Awesome job. These seem to behave like classic closed cans. Reminds me of my HD202s.
     
  10. sorrodje

    sorrodje Carla Bruni's other lover - Friend

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    @ultrabike : I bought a tool to calibrate my mic. I'll bring it with me for my us trip ;)
     
  11. ultrabike

    ultrabike Measurbator - Admin

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    Cool! What did you get?
     
  12. sorrodje

    sorrodje Carla Bruni's other lover - Friend

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