Tweakers' Asylum

Posted by mark m (A) on June 21, 2003 at 13:26:03

I have just purchased these drivers & want to try a project. any advice to box size & a network.

thank you very much

7 inch mid bass driver

Usher Audio Model: 8945A/W
(Dr. Joseph D'Appolito states that the Usher
8945A/W sound is identical to Scanspeak 18W/8545.)

Technical Parameters for 8945A/W
Impedance:8 Ohms
Fs: 35Hz
Power RMS: 80W
Sensitivity: 87dB
Xmax: +6mm
Vas: 34.3 Liters
Qts: 0.32
Qms: 2.05
Qes: 0.38

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tweeter
Scan speak D2905/9500-06

Characteristic sensitivity (2.83V / 1m) :
90 dB Recommended frequency range :
2 - 30 kHz Free air resonance frequency,
fs : 550 Hz DC resistance,
Re : 4.7 ohm Voice coil inductance,
Le : 0.08 mH Effective piston area,
Sd : 8.5 cm² Moving mass incl. air,
md : 0.45 g Force factor,
BL : 3.5 Tm Excursion,
lin./max. : ±0.4 / ±1.5 mm Voice coil
diameter : 28 mm Rated power handling :
150 W (12 dB/oct. cross-over at 2.5 kHz)
Net weight : 0.7 kg