haavind

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    • haavind
      haavind replied to the thread recycling old woofers.
      properly zeroing my multimeter before doing resistance measurements on R_sense, R_ref and DC coil resistance, and measuring R_sense...
      • driver_4_finalcalibration.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      I bought a pack of lower value resistors with better power handling. I'm now using 27 ohm R_sense and 7 ohm R_ref. I soldered my wire...
      • warmup.jpg
      • impedance_all_four_drivers.jpg
      • double_added_mass.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      this is a single 256k sweep now. Before I was doing 4x512k.
      • impedance_clean.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      It turns out my microphone input gain setting was waayy to high :facepalm: Thanks for your critical questions I suppose :oops:
    • haavind
      haavind replied to the thread recycling old woofers.
      It seems like the blue part of the cable is an especially good 50hz antenna :confused: 20-30-40 dB more sensitive than different...
      • 20250206_001752~3.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      If I set it higher, REW complains about input clipping. If I overrule the input clipping, the result comes out wrong. Wrong values and...
    • haavind
      haavind replied to the thread recycling old woofers.
      Good luck decoding this mess :p
      • 20250206_001752~2.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      I've tested the drivers cold and on different days and different times of the day. It doesn't vary that much from the new breakin curve...
      • TS_smooth.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      I don't know. I was hoping someone wise here could enlighten me because this was the opposite of what I expected. A softer spring should...
      • 20250203_223706.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      pre-breakin (darker colors) vs post-breakin (brighter colors) impedance plot. The general trend is that the resonance peak shifted up...
      • pre_vs_post_breakin_impedance.jpg
      • post_breakin_TS_driver1.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      I see. What metric are you basing that on? Yeah you are right. I used the built in calculator in the TS module in REW and punched in...
    • haavind
      haavind replied to the thread recycling old woofers.
      I would never recycle my old wooffer Even if he barely woofs anymore My measurement rig is not superhigh fidelity. some 50hz mains...
      • 20250202_153757(1).jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      Finally got my wiring harness and buggy mic soundcard to work ;) Here's my impedance curves, yellow is free air, purple is 7g added...
      • TS_impedance.jpg
      • TS_calc.jpg
    • haavind
      haavind replied to the thread recycling old woofers.
      Not really sure how. Also, not really sure how I would interpret the result. TS is still a little bit mysterious to me. What would a...
    • haavind
      I have a handful (4) of old 8" woofer elements from my old Dali AXS8000 and I am looking for something to do with them. The model number...
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