TVM ARN312-00/4

HiFi subwoofer

Manufacturer parameters
  • Diameter: 12" (30cm)
  • Power (W): 100/300
  • Impedance (Ohm): 4
  • Sensitivity (db/1W): 90
  • Qts: 0,29
  • Price: manufacturer does not exist anymore, I got it for 1990Skk (66)
  • Diaphragm: coated paper
  • Basket: diecast
  • Magnet: single
Measured parameters
  • Fs = 25.12 Hz
  • Re = 3.51 ohms[dc]
  • Le = 1693.35 uH
  • Qt = 0.28
  • Qes = 0.35
  • Qms = 1.44
  • Mms = 83.82 grams
  • Rms = 9.210271 kg/s
  • Cms = 0.000479 m/N
  • Vas = 142.32 liters
  • Sd= 459.96 cm^2
  • Bl = 11.549561 Tm
  • gamma = 137.8 N/A.kg
  • ETA = 0.62 %
  • Lp(2.83V/1m) = 93.63 dB (91dB/1W)
  • EBP=72 Hz (bassreflex/sealed)


Woofer popular in Czech and Slovak republic thanks to its reasonable price and parameters. Some say its bass are too muddy, but it was not true in my case. It has good sensitivity and low resonance frequency, suitable for bass-reflex and bandpass enclosures. It needs a quite a big enclosure, but can produce bass deep enough for any music or movie. There are a few things you'd not appreciate: there are NO vent holes, so the input power is just 100W RMS and the airflow through the gap produces audible noise. Cone is also not very rigid and last, but not least, parameters of these drivers varied so much, that every driver needs different enclosure.


Project 1
Project 2