We are extremely busy a the moment - please bear with us whilst we work through the orders. Thankyou, Will & Caroline.
The Fountek FM135D-II is a 5¼" / 135mm midrange driver featuring an aluminium cone, a rigid diecast basket and a high temperature copper clad aluminium voice coil wound on a 35mm kapton former.
Operates as a pure piston between 120 - 400Hz then the response gently tapers upwards to 5Khz, our recommended upper limit for this unit. As to be expected with a small metal coned drive unit, the FM135D-II has an excellent transient response. The first major cone breakup occurs at around 7Khz, this is easily avoided or notched in the crossover.
|Resonant frequency (fs)||73 Hz||Nominal impedance (Zn)||8 Ω|
|Mechanical Q factor (Qms)||1.84||DC resistance (Re)||6.3 Ω|
|Electrical Q factor (Qes)||0.69||RMS power handling||30 W|
|Total Q factor (Qts)||0.28||Sensitivity (2.83V/1m)||89dB|
|Equivalent volume (Vas)||6.47L||Chassis diameter (cropped)||150 mm|