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boputnam
04-30-2003, 07:33 AM
Any idea what application this was designed for? Visually identical to the LE8T, except the cone is very, VERY thin, no Aquaplas.

Specs?

Thanks.

4313B
04-30-2003, 09:57 AM
The LE8T-2 is the home version of the 2115A.

Fs = 55 Hz
Qms = 4
Vas = 36 liters
Cms = 761 Ám/N
Mms = 11 g
Rms = 0.95 mohms
Xmax = 5.588 mm
Xmech = 11.18 mm
P-Dia = 152.4 mm
Sd = 0.0183 sq.m
P-Vd = 102 cu.cm
Qes = 0.54
Re = 5.5 ohms
Le = 0.3 mH
Z = 8 ohms
BL = 6.2 Tm
Pe = 30 watts
Qts = 0.48
no = 1.07 %
1-W SPL = 92.4 dB
2.83-V SPL = 94.1 dB

(The LE8TX is a 16 ohm version.)

Mr. Widget
04-30-2003, 10:54 AM
I may be making this up, but I seem to remember that it was the variant used in the Aquarius 4.

4313B
04-30-2003, 11:30 AM
Yep, the S109 Aquarius IV, along with the LE20-1 and LX12-7

boputnam
04-30-2003, 07:19 PM
Giskard - those T-S parameters for the LE8T-2 produce a decidedly different response curve from the LE8T and the 2215A (using WinISD 0.44).

All told, it looks like the LE8T is the superior full-range transducer? It doesn't roll off until 40Hz, hitting -3dB at 35.6Hz. Thoughts?

Thanks again to both you and Mr Widget!

4313B
04-30-2003, 09:07 PM
Thoughts about what?

Mr. Widget
04-30-2003, 10:24 PM
When the library comes back on line, look up the Aquarius 4 and in the description of it's development they explain how and why the driver was modified.

Basically the LE8t-2 is pretty use specific.

jesseklapholz
12-04-2015, 12:35 PM
When the library comes back on line, look up the Aquarius 4 and in the description of it's development they explain how and why the driver was modified.

Basically the LE8t-2 is pretty use specific.

As I recall the LE8T had a copper shorting ring which additionally added mass (ergo lower efficiency) tot he cone to lower it low-frequency resonance.

jesse klapholz