JBL S2600 Bedienungsanleitung

S2600/S3100 LOUDSPEAKER SYSTEMS

Specifications:

System: S2600 S3100

Maximum Recommended

Amplifier Power: 400 watts 400 watts

Nominal Impedance: 6 ohms 6 ohms

Crossover Frequency: 950Hz 750Hz

System Sensitivity: 92dB 94dB

(2.83V @ 1 m) (2.83V @ 1 m)

Low Frequency Transducer:

Model: ME120 HS ME150 HS

Nominal Diameter: 300mm (12in) 380mm (15in)

Voice Coil Diameter: 75mm (3in) 100mm (4in)

Sensitivity: 92dB 95dB

(2.83V @ 1 m) (2.83V @ 1 m)

High Frequency Driver/Horn:

Models: 2426H Driver and H2600 Horn

Voice Coil Diameter: 45mm (1.75in) Edgewound Aluminum Ribbon

Magnetic Assembly Weight: 4.5kg (10lb)

Flux Density: 1.8T (18,000 gauss)

Sensitivity (on driver axis): 108dB (1 watt @ 1m)

General:

Dimensions: 984mm H x 559mm W 1111mm H x 559mm W

x 406mm D x 406mm D

(38.75" x 22" x 16") (43.75" x 22" x 16")

Net Weight: 52.3kg 56.8kg

(115lb) (125lb)

Shipping Weight: 59kg 63.6kg

(130lb) (140lb)

JBL Consumer Products, Inc.

80 Crossways Park West

Woodbury, NY 11797

8500 Balboa Blvd.

Northridge, CA 91329

1-800-336-4JBL

A Harman International Company

Printed in USA on recycled paper 10/94

Part No. OMS2600/S3100

S2600, S3100

LOUDSPEAKER SYSTEMS

OWNER’S MANUAL

S 3 1 0 0

S 2 6 0 0

S 2 6 0 0 S 3 1 0 0

S2600/S3100 LOUDSPEAKER SYSTEMS

THE S2600 AND S3100

LOUDSPEAKER SYSTEMS:

Today’s requirements for audio-

phile listening in the home environ-

ment place a high premium on

stereophonic imaging, and the

S2600 and S3100 systems, like the

Project Everest DD55000 system

before them, provide accurate

stereo soundstage imaging over a

wide listening area. At the same

time, the systems, with their horn

loaded high frequency section, can

deliver high acoustic output with

very low distortion.

PLACEMENT AND ADJUSTMENT:

JBL believes that the most

accurate stereo soundstaging will

normally take place when the

included angle between loudspeak-

ers and the listener is in the range

from 40 to 60 degrees, as shown in

Figure 1. In most listening spaces,

this translates into a loudspeaker-

to-loudspeaker distance of 2 to 3

meters, with the listener located at

a similar distance from the line con-

necting the loudspeakers. This will

result in a nominal listening angle of

about 53 degrees. The listener may

then move closer or farther away to

adjust the angle to taste.

In the condition we have

described here, place the loud-

speakers so that their baffles are

parallel to the wall behind them.

The exact placement is not critical.

Corner placement works well, since

the controlled radiation from the

systems will cause minimal reflec-

tion from the adjacent wall.

If you choose to operate the

loudspeakers in a larger room with

greater spacing between them, it

may be necessary to angle them in

slightly (perhaps not more than 5 to

10 degrees) to achieve the desired

image stability over a wide listening

range.

Begin the setup procedure by

putting on a recording that has a

strong phantom center image.

(Most solo vocal recordings will sat-

isfy this requirement.) As you are

sitting in the middle, equidistant

from the loudspeakers, you should

hear a strong, unambiguous center

image. Take time here to adjust bal-

ance, if necessary. Then, as you

move slightly to one side, the

image should remain clearly cen-

tered.

Loudspeaker

40° - 60°

Figure 1. T e 40° to 60° listening angle.

Listening Area

As you move further to one

side, the image should remain cen-

tered, if you have used the recom-

mended 2 to 3 meter spacings dis-

cussed earlier. If you are using a

wider spacing, then the image may

tend to move toward the nearer

loudspeaker. If this takes place, it is

your cue to angle both loudspeak-

ers inward slightly, so that more

correction will take place. Be sure

to angle both loudspeakers the

same amount, so that side-to-side

symmetry is maintained. Details

here are shown in Figure 2.

ELECTRICAL CONNECTIONS:

The models S2600 and S3100

are can be operated by a normal

stereo amplifier, or they may be

operated in “bi-wire” configuration.

For standard operation, bus bars

connect the two sets of terminals

on the back of each enclosure so

that both high and low frequency

sections of the dividing network are

electrically in parallel.

In the bi-wiring configuration, a

separate amplifier section feeds

each of the high and low frequency

portions independently. In bi-wiring,

the full signal is applied to both

high and low frequency sections of

the dividing network; however, the

network will restrict the current flow

only to those signals intended for

the high or low frequency trans-

ducer. Bi-wiring has the advantages

of biamplification, but without the

need for an external electronic

dividing network. A schematic dia-

gram of the bi-wiring option is

shown in Figure 3.

GRILLES:

Grilles are a complement to the

details and industrial design of the

loudspeaker system. However,

many listeners prefer to operate

their loudspeakers with the grilles

removed, even though JBL has

used the most acoustically trans-

parent materials available. The

choice is strictly up to the listener.

THEORY OF OPERATION:

The uniform imaging properties

of the S2600 and S3100 systems

are based on the asymmetrical hori-

zontal coverage patterns that the

two loudspeakers produce. Above

1kHz, the high frequency horn’s

pattern ranges from wide, directly

in front of the system, to narrow, as

the listener moves off axis toward

the middle of the array and beyond.

Figure 2. For loudspeaker spacing in excess of

3 meters, set a in t e range of 5 to 10 degrees.

S2600/S3100 LOUDSPEAKER SYSTEMS

For a listener seated equidis-

tant between these, or any other

loudspeakers, stereo imaging will

be accurate. However, with conven-

tional loudspeakers, as the listener

moves off axis the stereo stage

becomes skewed toward the closer

loudspeaker. The reason for this is

that the sound from the nearer

loudspeaker is louder and arrives at

the listener’s ears slightly earlier.

Both of these cues favor localiza-

tion at the nearer loudspeaker, and

the soundstage is skewed accord-

ingly.

With the S2600 and S3100 sys-

tems, an off-axis listener will be

located along a zone of higher sen-

sitivity for the loudspeaker farthest

away from him. Therefore, the level

differences due to unequal path

lengths will be compensated.

Changing the toe-in angle of the

loudspeakers will enable the user to

fine tune the systems for nearly any

listening environment.

The imaging performance of

these systems is made possible

through the use of a new high fre-

quency horn that has skewed cov-

erage, rather than the normal sym-

metrical coverage characteristic of

most horns. Figure 4 shows the

polar diagrams of the left horn on

octave centers from 1kHz to 8kHz.

The response of the horn in the

right loudspeaker would be the mir-

ror image of the curves shown here.

HF In

LF In

a. Normal wiring

HF In

LF In

b. Bi-wiring

Figure 3. Principle of Bi-wiring.

0 dB

-5

-10

0 dB

-5

-10

0 dB

-5

-10

0 dB

-5

-10

1 kHz

2 kHz

4 kHz

8 kHz

Figure 4. Horizontal polar response for

t e left c annel loudspeaker.

10°

20°

30°

40°

50°

0°

10°

20°

30°

40°

50°

0°

10°

20°

30°

40°

50°

0°

10°

20°

30°

40°

50°

0°

TYPICAL SYSTEM

PERFORMANCE:

Figure 5 shows the on-axis sine

wave response of the S2600 sys-

tem taken in a 2πenvironment

(adjacent to one wall), with contri-

butions from low and high frequen-

cy elements indicated separately.

The dashed line represents the

effect of 4π(free space) loading.

The overall response does not vary

by more than ±2.5dB from 75Hz to

13kHz. The impedance of the sys-

tem is also shown in this graph.

20 100 1K

70dB

10Ω

31.6Ω

3.16Ω

80dB

90dB

100dB

10K 20k

l g frequency – Hz

GROUND PLANE

4π

2π

s und pressure level

IMPEDANCE (OHMS)

ANECHOIC

4π

20 100 1K

60dB

70dB

80dB

90dB

100dB

10K 20k

s und pressure level

2nd Harm nic (+20dB)

3rd Harm nic (+20dB)

Figure 5. S2600 Frequency Response & Impedence

Figure 6. S2600 2nd & 3rd Harmonic Distortion

Figure 6 shows second and

third harmonic distortion for the

S2600 system at a level of 96dB

SPL measured at a distance of

1 meter. The distortion curves have

been raised 20dB for ease in read-

ing. Under these measurement

considerations the low frequency

distortion remains well under 1%.

High frequency distortion is no

greater than 2% out to 8.5kHz.

S2600/S3100 LOUDSPEAKER SYSTEMS

PERFORMANCE WITH VIDEO:

Both the S2600 and S3100

systems can be used in typical

video installations. Due to the ori-

entation of the compression dri-

vers, with their magnets located at

the outside rear of each enclosure,

video systems may be placed any-

where between the stereo pair of

loudspeakers, with residual mag-

netic fields well within standards

for video applications.

ADDITIONAL TECHNICAL

INFORMATION:

In addition to their attribute of

superb imaging, the S2600 and

S3100 systems are designed and

built very much in the JBL tradition

of fine workmanship and the use of

the best materials. Both LF trans-

ducers are new designs that incor-

porate Aquaplas® damping materi-

al on both cones and surrounds for

smoothest response. Both trans-

ducers have cast aluminum frames

for extra strength, and magnetic

structures have been linearized

through a series of on-going JBL

improvements in this area.

The high frequency driver has a

titanium diaphragm for added resis-

tance to the effects of fatigue and

for extended high frequency

response.

The enclosure is made of

rugged 25mm (1in) particle board,

liberally braced for high damping.

WARRANTY AND SERVICE:

JBL continually strives to

improve its products. New materi-

als, production methods and

design refinements are introduced

into existing models without notice

as a routine expression of our

design philosophy. For this reason,

JBL S Series Loudspeakers may

differ in some respect from their

published specifications and

descriptions, but will always equal

or exceed the original specifica-

tions unless otherwise stated.

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