JBL 4410

User Manual: JBL 4410

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PROFESSIONAL SERIES
FEATURES:
Frequency Range f -6 dB): 35 Hz-27 kHz
Frequency Response
( f
2 dB): 45 Hz-20 kHz
Sensitivity: 91 dB SPL,
1
W (2.83 V),
I
m
Power Rating: 125 watts, pink noise
Transducer Complement:
250
mm
(10 in) LF, Aquaplas laminate cone
125 mm (5 in) midrange cone
25
mm
(
1 in) HF, pure titanium
dome
The 44 10 reflects the same design principles
which characterize all JBL monitors: smooth overall
response, controlled dispersion, and the ability to
produce high acoustical output with little stress.
Optimum enclosure porting and careful network
design ensure smooth response over a wide
bandwidth. Response to 27 kHz ensures that the
upper musical octave
(
10 kHz to 20 kHz) will be re-
produced with utmost accuracy.
JBL’s new 44 10 studio monitor consists of a three-
L way vertical array of transducers. The system is pro-
vided in mirror-imaged pairs in order to ensure
absolute accuracy of stereophonic imaging. The 44 10
is thus the logical choice for critical digital
applications where wide bandwidth, linear recording
response, and accurate imaging are essential.
HIGH FREQUENCY
DOME RADIATOR
Pure titanium was first used by JBL in the design of
diaphragms for high frequency compression drivers.
Recently, JBL has perfected a 25 mm titanium dome
radiator which is capable of 30 watts power handling
and can reproduce the frequency range from 3 kHz to
27 kHz. The unique “diamond surround” and ribbed
dome structure of the model 035Ti HF unit provide
control over secondary resonances, yielding abso-
lutely flat axial response to the normal upper limits
of today’s recording media. With a basic sensitivity of
92 dB, one watt at one meter, the 035Ti transducer
exhibits virtually no dynamic compression.
MIDRANGE DRIVER
The 100 mm (5 in) midrange driver used in the
4410 has a 25 mm
( I
in) diameter copper voice coil.
The cone is made of felted paper with a special
damping treatment applied to ensure smooth
response. The basic sensitivity of the midrange
transducer is 94 dB, one watt at one meter, and this
ensures that the device will exhibit negligible
dynamic compression, even at high drive levels.
LOW FREQUENCY DRIVER
The 250 mm
(
10 in) diameter LF driver has a felted
paper cone laminated with Aquaplas. This unique
combination of materials has been used by JBL for
many years as a means of achieving smooth
response in the upper range of low frequency
transducer operation. In the 44 10 system, the critical
crossover region around 800 Hz benefits from the
Aquaplas treatment, and the transition to the
midrange unit is made effortlessly.
Linearity of the LF driver is the result of careful
attention to mechanical suspensions as well as
Symmetrical Field Geometry (SFG). SFG reduces
harmonic distortion by producing identical magnetic
flux fields on each side of the magnetic gap. This en-
sures that the voice coil will intersect equal flux lines
for both positive and negative excursions of the
cone. A flux stabilizing ring placed around the pole
piece reduces the effects of magnetic flux field
modulation. Overall, SFG reduces distortion to
about one-tenth the value found in conventional
magnetic structures.
A cast aluminum frame ensures mechanical
integrity under the most demanding operating
conditions.
-+
DIVIDING NETWORK
The complex network design produces a seamless
system frequency response through the critical
crossover regions at 800 Hz and 4.5 kHz. The rolloff
slopes are precisely determined to result in smooth
axial and power response.
High quality polypropylene and polystyrene
capacitors are utilized as “bypass capacitors” in par-
allel with the larger network mylar capacitors. This
design procedure linearizes energy storage in the
larger capacitors, and the result is greater accuracy in
the reproduction of transient signals.
Front baffle controls allow precise adjustment of
mid and high frequency transducer levels, enabling
the system to be adjusted to taste, or to match a
given acoustical environment.
SPECIFICATIONS:
SYSTEM
Frequency Range
(
-6 dB) 35 Hz-27 kHz
Frequency Response
(2
2 dB) 45 Hz-20 kHz
Power Ratme’ 125 watts
Sensitivity: 91 dB SPL.
I watt
(2 83 V) at
I
meter
Nominal Impedance: 8 ohms
Crossover Frequency: 800 Hz, 4 5 kHz
LOW FREQUENCY TRANSDUCER:
Nominal Diameter: 250 mm (IO in)
Voice Coil. 50 mm (2 in) diameter copper
Magnetic Assembly Weight: 2.7 kg (6 lb]
Flux Density: 1.08 tesla (10,800 gauss)
Sensitivity? 90 dB SPL, 2.83 Vat I m (3 3 ft)
MID RANGE DRIVER:
Nominal Diameter: 125 mm (5 in)
Voice Coil: 25 mm (I in)
Magnetic Assembly Weight: 0 74 kg (1.63 lb)
Flux Density: 1.25 tesla (12,500 gauss)
Sensitivity: 94 dB SPL, 2.83 Vat I m (3.3 ft)
HIGH FREQUENCY DOME RADIATOR:
Nominal Diameter: 25 mm (I in)
Voice Coil: 25 mm (I in) diameter copper
Magnetic Assembly Weight: 0 91 kg (2 lb)
Flux Density I .5 tesla (I 5,000 gauss)
Sensitivity?: 92 dB SPL. (2.83 V) at I m (3.3 ft)
GENERAL:
Finish: oiled walnut
Grille donor. dark blue
Dlmenslons 597 mm x 362 mm x 286 mm deep
(23% m x 14% m x I I % m deep)
Weight I9 kg (43 Ibs)
Shlppmg Weight 23 kg (50 Ibs)
‘Ratmg based on test signal of flltered random ncxse conformmg to mternatlonal standard IEC 268.
5 (pink norse with I2 dB/octave rolloff below 40 Hz and above 5000 Hz wth a peak-to-average rat,0
of6 dB) two hours duration
*Averaged from 100 Hz to 500 Hz wthm
I
dB
‘Averaged above 3 kHz wthln I dB
Frequency Response,
1
W at lm; impedance Beamwidth ( -6 dB) vs. Frequency
Directivity (DI and Q) vs. Frequency Phase Response vs. Frequency, 200 Hz to 22 kHz; vertical
divisions at 45 degrees.
Horizontal Off-axis Response vs. Frequency
( -
3, - 6, - 9, and Vertical Off-axis Response vs. Frequency
( -
3, - 6, - 9, and
- I2 dB contours) - I2 dB contours)
Energy-Time Curve (time span, 0 to 18,304 microseconds;
vertical divisions 6 dB; loudspeaker placed one meter from
microphone) Note that the bulk of the loudspeaker’s energy
arrives at the microphone coherently.
Time-Energy-Frequency (TEF) Curves (250 Hz to 20 kHz) Front-
back span is from 8200 microseconds to 3053 microseconds;
vertical divisions 6 dB. Note the smooth decay of the system and
high frequency extension beyond 20 kHz.
Mid Frequency Control Range High Frequency Control Range
Distortion vs. Frequency, IO watts (distortion raised 20 dB) Power Compression, at 85,95, and 105 dB, one meter
IBL contmually engages m research related to product wnprovement New materlals productmn
methods and dwgn refmements are mtroduced mto exlstmg products wthout not~e as a routme
expression of that phkophy For this reason any current IBL product may dtffer I” some respect
from I& pubhshed descnptmn but wll always equal or exceed the original design speclflcatmns
unless othervase stated
WI
:
JBL
Professional, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A.
66988 SS4410 P820 25M 4186

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