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Everything posted by ITR

  1. Yes, I will second that. A single channel of K20 should be plenty.
  2. Here you go. My 3 kW amplifier could not push it further than +/- 15 mm (~210 V peaks) so you don't actually see where the 70% limits are, but one can have a pretty good estimate.
  3. It also says 5 kW peak amp power. You can choose to believe them or me. I will post the impedance plot for you.
  4. And that was after the LSI test.
  5. Sorry, I am little late to the party. Could you please point me to the newer thread, I could not find it. I did not mean that high moving mass would always be an indicative of high inductance, I was just replying to his question. T/S parameters below. Electrical Parameters Re 4.65 Ohm electrical voice coil resistance at DC Le 3.143 mH frequency independent part of voice coil inductance L2 8.938 mH para-inductance of voice coil R2 16.81 Ohm electrical resistance due to eddy current losses Cmes 898.19 µF electrical capacitance representing moving mass Lces 21.56 mH electrical inductance representing driver compliance Res 51.10 Ohm resistance due to mechanical losses fs 36.2 Hz driver resonance frequency Mechanical Parameters (using laser) Mms 491.600 g mechanical mass of driver diaphragm assembly including air load and voice coil Mmd (Sd) 464.350 g mechanical mass of voice coil and diaphragm without air load Rms 10.711 kg/s mechanical resistance of total-driver losses Cms 0.039 mm/N mechanical compliance of driver suspension Kms 25.38 N/mm mechanical stiffness of driver suspension Bl 23.395 N/A force factor (Bl product) Lambda s 0.045 suspension creep factor Loss factors Qtp 0.911 total Q-factor considering all losses Qms 10.428 mechanical Q-factor of driver in free air considering Rms only Qes 0.949 electrical Q-factor of driver in free air considering Re only Qts 0.870 total Q-factor considering Re and Rms only Other Parameters Vas 38.8458 l equivalent air volume of suspension n0 0.186 % reference efficiency (2 pi-radiation using Re) Lm 84.90 dB characteristic sound pressure level (SPL at 1m for 1W @ Re) Lnom 86.00 dB nominal sensitivity (SPL at 1m for 1W @ Zn) Series resistor 0.00 Ohm resistance of series resistor Sd 834.69 cm² diaphragm area
  6. I hear you. What kind of tests/measurements you are after? It is not edgewound coil. It has round wire. 16" Very true. Actually you won't even need two. High moving mass, lots of inductance. SVS has their own proprietary basket (+cone and surround) which indeed is 16". Tymphany's own version is 15". I also had PB12-Ultra and PB12-Plus/2. Great subs. That is correct.
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