Isophone PSL 203/35

General

   Manufacturer: Isophon
   Model: PSL 203/35
   Years of manufacture: until ca. 1979
   Made in: Berlin, Germany
   Color: 
   Weight:
   New price approx.: 40 DM

Technical data

   Type: (cone/ dome/...) cone
   diameter: 203 mm
   Power handling: 35W sinus
   frequency response: 35 - 6000 Hz
   sound pressure level: 88 dB/W/m

Thiele-Small parameters

   Impedance (Zmax): 4 Ohm
   Power (Pe):
   diaphragm area (Sd): 240 cm²
   resonant frequency (Fs): 35 Hz
   DC resistance (Re): 3.8 Ohm
   Voice coil inductance (Le):
   Mechanical Q-factor (Qms): 1.98
   Electrical Q-factor (Qes): 0.78
   Total Q factor (Qts): 0.56
   Equivalent volume (Vas): 68 l
   Diaphragm displacement volume (Vd):
   Drive factor (Bxl): 5.13
   total moving mass (Mmd):
   effective moving mass (Mms): 24.5 g
   mechanical losses (Rms):
   Diaphragm Stroke (Xmax/Xmech):
   Efficency Bandwith Product (EBP): 

Special features

 The systems were available in 4 Ohm and 8 Ohm (OEM versions with 6.5 Ohm are also known). 
 The older systems were equipped with AlNiCo magnets, the newer ones with round magnets.

Comments

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