Unique in both concept offers uncolored,

to that of many two-way free response

listening

in-line arrays, monitoring

level greater than 85 dB not only at 500 Hz

but at 50 or 5,000 Hz as well

superior

Model 2115H is unquestionably

the 2115H is ceiling

speaker

facilities, and music

substantially

uniform

only 42 L (1.5 ft3) internal volume, asingle

deliver exceptional

efficiency

more than eight octaves. Installed in an enclosure

offered for professional

ingly crafted to traditional

Unlike other 200 mm (8 in) loudspeakers,

the JBL 2115H maintains through

from distortion,

for top quality distributed-speaker

rooms.

a sound pressure

JBL Model 2115H performance

monitor systems. Because of its peak-

and freedom

recommended installations,

and execution,

natural, wide-range

care or attentionThe of

2115H can produce

impedance

the finest 200 mm loudapplications.

JBL standards

performance

It is painstak-

of precision

and will

year after year without special

2115J offers identical

is 16 0 rather than 8 n.

performance;

its

Model 2115H/J-200 Architectural

mm (8 in) Full Range Loudspeaker

Specifications

The loudspeaker

shall have a nominal

(8 in), overall depth not greaterthan

diameter

of 200 mm

100 mm (4 in), and weigh

at least 3.6 kg (8 Ib).The frame shall be of cast aluminum to resist deformation

and the magnetic

a ferrite magnet and a symmetrical the voice coil gap. An aluminum

magnetic

imately 50 mm (2 in) in diameter aluminum

shall utilize

field around

ring on the pole piece shall

act to reduce flux modulation.The edgewound

assembly

voice coil shall be approxand shall be made of

ribbon operating

in a magnetic

not less than 0.85 T (8,500 gauss). High frequencies be reproduced

by a damped

aluminum

field of shall

dome attached

directly to the voice coil former. Performance

specifications

of a typical production

unit shall

be as follows: Measured warbled

sensitivity 500-2500

(SPL at 9.1 m [30 ft] with one mW input, Hz) shall be no less than 42 nor greater

than 45 dB on axis, and down no more than 2 dB 45’ off axis. As an indication

of electromechanical

conversion

ciency, the BI factor shall be at least 6.8 pm. quency

response

Usable fre-

shall extend from 40 to at least 15,000

Hz. On-axis response,

measured

or more under free-field

at a distance

conditions,

1,500and

of 1.8 m (6 ft)

shall be within A3 dB

from 40 to 12,000 Hz, with the exception between

effi-

of the region

6,000 Hz. In this region, responseshall

ex-

hibit a gentle 4-5 dB rise to heighten the feeling of “presence:’ Above 6,000 Hz response

shall gradually

roll off, but at 15

kHz shall not be more than 6 dB down from the 500-2500 reference

level. Nominal

impedance

power capacity

shall be at least 50 watts normal

music program

material.

The loudspeaker speakers submitted

shall be JBL Model 2115H/J.

will be considered

for equivalency

data from a recognized

verify that the above performance

: Em

Professional

Hz

shall be 8 or 16 ohms and speech or

Other loud-

provided

independenttest specifications

that

laboratory are met.

Division

James B. Lansing Sound, Inc., 8500 Balboa Boulevard, Northridge, California 91329 U.S.A.