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JBL Le8T AND NFX (Read 3694 times)
tubetrapper
Ex Member



JBL Le8T AND NFX
11/07/06 at 20:01:05
 
Hello,
do you know JBL LE8T and NFX design are compatible?
Here some specifications:

Nominal Diameter:200 mm (8 in)
Rated Impedance:8 ohms
Sensitivity: 89 dB SPL 1 W. 1 m
Frequency Range: 35 Hz 15 kHz
Recommended Enclosure Volume:20-115 L (3/4 4 ft3)
Effective Piston Diameter:152 mm (6 in)
Maximum Excursion Before Damage:13 mm (1/2in peak to peak)
Minimum Impedance:6.2 ohms ( ± 10% @ 25șC)
Voice Coil Diameter:50 mm (2 in)
Voice Coil Winding Depth:3.7 mm (0.145 in)
Magnetic Gap Depth:11.9 mm (0.470 in)
Magnetic Assembly Weight:2.8 kg (6 lb.)
Flux Density:0.85 T (8,500 gauss)
Bl Factor: 6.2 N/A
Effective Moving Mass:0.016 kg

fs:45 Hz
Re: 5.5 ohms
Qts:0.49
Qms: 4.0
Qes:0.65
Vas:35 L (1.2ft3)
Sd:0.018 m2 (28 in2)
Xmax:4,6 mm (0.18 in)
Vd:99 cm3 (6 in3)
Le:0.3mH
no (Half space):0.5%
Pe (Max):25 W continuous sine wave

Thanks
Guglielmo
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Brian
Ex Member



Re: JBL Le8T AND NFX
Reply #1 - 01/29/07 at 20:56:23
 
Hi Tubetrapper,
The wide range of options for enclosure volume, the very long Maximum Excursion Before Damage, and the reasonably large Qts value all make this look like an excellent speaker for an open baffle mounting such as the NFX.  
Also, a 2 inch voice coil is an unusually large diameter for an 8 inch speaker.  This ought to give the motor extra control, which ought to be another recomendation for open baffle use, since there is no cabinet to provide damping of unwanted speaker cone movement.  
I would expect good results.  

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