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ARCHITECTURAL SPECIFICATIONS:
The hansducer shall have a nominal diameter of 130 mm I5 in). overall depth not
greater than 45 mm ( 1% inl, and weigh at least I .2 kg (21/r Ibl. The frame shall be of cast
aluminum to resist deformation. The voice coil shall be approximately 22 mm (A In) in
&meter and shall be made of edgewound copper ribbon operating in a magnetic field
of not less than 1.35 T. The transducer shall be designed to allow mounting from either
the fmnt or the rear of the baffle board.
Performance speciffcations of a typical production unit shall be as follcws: Measured
sensitivity (SPL at
I m with a I W input. wept 500-2500 Hz) shall be at least 94 dB on
axls and 93 dB 45off axis. As an lndicatlon of electromechanical conversIon efficiency,
the BI factor shall be at least 6.6 Tm. The half-space reference efficiency shall be
I .2 %.
Usable frequency response shall extend from 300 Hz to I5 kHq. On-axis response,
measured at a distance of I .8 m (6 ft) or more under free Reid conditions, shall
approximate a straight line dsing with frequencyata rite of I .5 dB per octave. Response
shall not deviate more than 3 dB from this characteristic from 300 HZ to 8 kHz. Above 8
kHz. response shall gradually roll off, but at I2 kHz shall not be more than 3 dB down
from the 500-2500 Hz reference level. Nominal impedance shall be 8 fl. Rated power
capacity shall be at least 50 W normal speech or music program material.
, T.he bansducer shall be IBL Model 2 105H. Other loudspeakers will be consldered for
equi&ncy provided that submitted data from a recognized independent test
laboratory verify that the above performance specifications are met.
+ZU
+15
+10
z+S
ii0 5 -5
-10
-15
-20
100 1,ml 10,COl
Frequency response contour of Model 2105H. Measured
response of a typical production unit, including all peaks and
dips, does not deviate more than 3 dB from the above curve.
IBL contmually engages m research related to product improvement New materials.. production
methods. and design refmements are mtroduced Into exlstmg products without notlce as a routrne
expressm of that philosophy For this reason. any
current IBL product may differ I some respect
from its pubhshed descnptlon. but wll always equal or exceed the ongtnal design speclficatlons
unless othewse stated
SPECIFICATIONS:
,.a
Nominal Diameter I30 mm (12 in)
Rated Impedance. 8 ohms
Power Capacity
50 W continuous program
Sensitiwty2
94dBSPL.IW.lm
Frequency Range. 300 Hz - 15 kHz
Rprnmmended Enclosure
.- _ _. . . Volume: 1.5 L (0.05 fts)
Effective Piston Diameter: 89 mm (3.5 in)
Maximum Excursion: 6.4 mm (% in peak to peak)
Minimum Impedance: 7.2 ohms (2 10% @ 25C)
Voice Coil Diameter: 22 mm (7/s in)
Voice Co11 Matenal Edgewound copper ribbon
Voice 0x1 Windmg Depth. 3 3 mm (0 128 m)
Magnetic Gap Depth: 3.6 mm (0.13 in)
Magnetic Assembly Weight: 0.74 kg
(1% lb)
Flux Density I 35 T (13.500 gauss)
BI Factor: 4.6 N/A
Effective Moving Mass: 0.0035 kg
Positipe voltage on black terminal gives forward diaphragm motion
Thiele-Small Parameters
f,. 200 Hz
R,: 6.1 ohms
Qts 53
Cl,,. 30
O,,: .65
V,,: .85L (.035 ft) ij
Sn: .JO62 m2 (9.6 in21
X,, 15mm(06in)
Vy). 9 2 cm3 (6 ing)
Le: 0.25 mH
qo (Half space): 1.2%
P, (Max): 25 W continuous sine wave
Mounting InformatIon
Overall Diameter 130 mm (5% in)
Bolt Circle Diameter II9 mm (4%6 in)
Baffle Cutout Diameter
Front Mount 108 mm (4% in)
Rear Mount 102 mm (4 m)
Qpical Volume !&placed
hxr n+ver When Mounted
, -.... in Enclosure: 0.3 L (0.01 fts)
Depth: 45 mm
(1% in)
Net Weight: 1.2 kg (2% lb)
Shipping Weight:
1.4 kg (3 lb)
Contmuous program power 1s defmed as 3 dB greater than contmuous sme wave power
and IS a conservatwe exprewon of the transducers ablhty to handle typical speech and
mwc program material
ZMeasured wtth an Input swept from 500 Hz to 2500 Hz
WI : JBL Professional, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A. 15M SS2105H 9/85 63907 Printed in USA
