Meyer Sound DS-2 Manuel utilisateur

Features

High power

Flat frequency response

Arrayable

Rugged

Long-term reliability

Applications

Main PA arrays

Concert reinforcement

Theater sound reinforcement

Live music clubs systems

DS-2

Mid-Bass

Loudspeaker

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

(510) 486-1166

FAX (510) 486-8356

The DS-2 is a high-power, arrayable

mid-bass unit designed to supplement

Meyer Sound MSL-3 and MSL-10A loud-

speaker systems in the 50-160 Hz range.

Optimized to perform in a wide range of

large-scale sound reinforcement applica-

tions, the DS-2 delivers high sound pres-

sure levels with extremely low distortion

and offers exceptionally controlled directiv-

ity.The system utilizes two proprietary 15-

inch cone drivers in a folded horn enclo-

sure braced with steel vertical reinforcing

rods. The horn features a hyperbolic flare

for maximum energy transfer with mini-

mum frequency response ripple. Its bal-

anced compression chamber presents a

symmetrical load to the drivers, providing

very high power handling. The rugged,

multiple-ply hardwood cabinet is fitted

with handles and, optionally, aircraft-style

rigging pan fittings.

The DS-2 requires a high-quality profes-

sional power amplifier capable of delivering

600 watts continuously into 4 ohms with a

signal voltage gain of 10 dB (minimum) to

32 dB (maximum), and can accommodate

up to 2500 watts burst power.

— 24

–

— 21

–

— 18

–

— 15

–

— 12

–

— 9

–

— 6

–

— 3

–

— 0

Inches

DS-2 Specifications

Acoustical – DS-2 /D-2 System

Frequency response

50-160 Hz ±3 dB

Maximum SPL

Continuous 136 dB

Peak 148 dB

Sensitivity

112 dB

Coverage (-6dB points)

Horizontal 120 degrees

Vertical 120 degrees

DS-2 Loudspeaker

Transducers (2) MS-15 15-inch cone driver

Impedance

Nominal 4 ohms

Minimum 3.5 ohms real part, 0 ohms imaginary part, at 80 Hz

Maximum Safe Amplifier Swing 140 Vpk

Enclosure Folded horn, multi-ply Finnish birch

Finish Black textured or charcoal-grey carpet (optional)

Physical Dimensions 21

⁄4" W x 56

⁄4" H x 30" D

Weight 250 lbs (113.6 kg)

Protective Grill Expanded metal screen frame, vinyl damped,

charcoal-grey foam covering

Connector Cannon EP-4 male, EP-5 male (Europe only)

Rigging Aircraft pan fittings

D-2 Control Electronic Unit

Input Type

Balanced ISO-Input,

™

10k ohms, 5k ohms per leg

Output Type Active push-pull, 300 ohms output impedance

Maximum Input Level

Balanced +21 dBu

Unbalanced +21 dBu

Maximum Output Level

Balanced +26 dBu

Unbalanced +20 dBu

Hum and Noise

<-90 dBV

Dynamic Range

120 dB

Sense Inputs 100k ohms true differential, opto-isolated

Crossover Frequency

Upper 160 Hz

Lower (Mode switch in “DS-2 & Sub” position) 65 Hz

Driver Protection Circuitry RMS limiter, true excursion limiter

Indicators

Sense/Amplifier Gain Detect Green/Red LED

RMS Limiter, Excursion Limiter Red LEDs

Power Supply Green LED

Controls

Front Panel Input attenuator, AC power switch

Preset Panel Mode switch, sub polarity switch, DS-2 power control

Rear Panel Ground lift switch, AC range switches

Connectors

Balanced Input/Output 3-pin XLR (A-3) female/male (front panel input optional)

Sense Inputs Banana jacks (4 dual)

Power 100-120/200-240V AC, 50/60 Hz (rear-panel switchable)

Physical Dimensions 19" W x 1

⁄4" H x 7

⁄4" D, standard rack mount

Weight 8 lbs. (3.6 kg)

Note 1:

Acoustical specifications are

for the minimum configuration

of two DS-2 cabinets, and are

measured on axis at 2 meters

from 1/R image (located at cabi-

net rear).

Note 2:

Half-space conditions, pink

noise input, in third-

octave bands.

Note 3:

Loudspeaker driven with “A”-

weighted noise (peak-to-RMS

ratio

≈

12 dB), with amplifier

rated at 600 W/channel at

4␣ohms. The DS-2 will accom-

modate amplifiers capable of

peak output levels up to

140␣Vpk.

Note 4:

Loudspeaker driven at 2 vrms

(1 watt @ 4 ohms).

Note 5:

ISO™ Input: Pins 1, 2 and 3

are transformer-isolated, and

shell is connected to chassis/

AC earth ground. Pin 3 positive

for positive pressure output.

Note 6:

“A”-weighted, unbalanced.

Note 7:

“A”-weighted noise floor to

maximum output.

D-2 Control Electronics Unit

analog OR condition, automatically tracks

the power amplifier with the greatest out-

put voltage swing to control the system

protection limiters.

Also provided is a switch-defeatable

crossover (Mode switch) and line-level out-

put to drive subwoofer systems, with a sub

polarity switch to facilitate aligning the

subwoofers with the main system. The sub

switches and other setup controls are lo-

cated behind a cover plate on the D-2 front

panel, providing a means for securing the

system installer’s presets.

The DS-2 loudspeaker operates as a

system with the D-2 Control Electronics

Unit (one per channel). Optimized for the

DS-2 and pre-aligned at the factory, the D-2

contains active crossover networks, fre-

quency response and phase response align-

ment circuitry, and Meyer Sound’s exclu-

sive SpeakerSense™ driver protection

circuitry, incorporating peak and RMS

signal limiting as well as excursion protec-

tion. A single-channel device operating at

line level, the D-2 is intended to be the

final component in the signal chain before

the power amplifier.

The D-2 SpeakerSense circuitry protects

the DS-2 loudspeaker components from

damage due to overheating or excessive

excursion under high power conditions.

This unique circuit continuously monitors

the power applied to the DS-2 drivers, and

limits the signal output when the safe oper-

ating areas of the drivers are exceeded.

Until the onset of overload, the Speaker-

Sense circuitry has no effect on the signal.

The D-2 SpeakerSense circuit incorpo-

rates Meyer Sound’s new MultiSense™

function, which allows the use of multiple

power amplifiers having different channel

gains and/or power ratings. The D-2 accom-

modates up to four amplifiers, and provides

separate Sense inputs for each. Its

MultiSense circuit, which implements an

Input Loop

∞

10 86543

Attn dB

UltraSeries™ D-2

RMS

Sense Limit

Power

DS-2 Only

Safe

Min Max

DS-2 Power

DS-2 & Sub 180 Polarity of

Sub Output

(to B-2A)

Mode

PUSH

Architectural and

Engineering Specifications DS-2/D-2

The mid-bass loudspeaker system shall

be of the folded-horn type with two 15"

cone loudspeakers in symmetrical compres-

sion chambers. The drivers shall be se-

curely mounted in the trapezoidal hard-

wood-plywood enclosure, and the loud-

speaker shall operate with a companion

Control Electronics Unit.

The Control Electronics Unit shall con-

tain a power supply capable of operating

from a 100-120/200-240V AC, 50/60 Hz

line, electronic crossover circuitry, RMS

limiters which protect the speakers from

overheating, true excursion limiters to pro-

tect the speakers from excessive excursion,

equalization circuitry, active balanced in-

put, indicator LED’s for power on and lim-

iters. A separate, switch-defeatable sub-

woofer output having switchable polarity

shall be provided. Total harmonic distor-

tion shall be less than 0.1%. The protection

limiters shall be controlled by sensing con-

nections to the power amplifier output, and

the Control Electronics Unit shall accom-

modate four separate amplifiers having dif-

fering gains and/or power ratings, with ana-

log OR circuitry to track the amplifier with

greatest output swing. “A” weighted noise

level shall be at least 90 dB below maxi-

mum rated output of +26 dBu.

Two speaker systems, when combined

with the Control Electronics Unit and a

power amplifier rated at 600 watts into

4␣ohms, shall meet the following criteria:

Frequency response, 50 to 160 Hz plus or

minus 3 dB measured with

⁄

octave noise,

136 dB SPL of continuous pink noise out-

put at 1 meter and peaks of 148 dB SPL.

Speaker enclosure dimensions shall be

⁄

W x 56

⁄

" H x 30" D, weight 250 lbs

(113.6 kg).

Control Electronics Unit dimensions

shall be 19" W x 1

⁄

" H x 7

⁄

" D, weight 8

lbs (3.6 kg).

The horn loudspeaker system shall

be the Meyer Sound DS-2. The Control

Electronics Unit shall be the Meyer

Sound D-2.

Meyer Sound Laboratories has

devoted itself to designing,

manufacturing, and refining com-

ponents that deliver superb sonic

reproduction. Every part of every

component designed and built to

exacting specifications and

undergoes rigorous, comprehen-

sive testing in the laboratories.

Research remains an integral,

driving force behind all pro-

duction. Meyer strives for sound

quality that is predictable and

neutral over an extended lifetime

and across an extended range.

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

(510) 486-1166

FAX (510) 486-8356

Arraying Examples

Arrayed with MSL-10A

Minimum Configuration

Block of Four Units Arrayed with MSL-3

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