Meyer Sound UM-1 Manuel utilisateur

UM-1C

UltraMonitor™

The UltraMonitor delivers the final

word on high-powered, critical monitoring.

Specifically designed for touring reinforce-

ment, the highly accurate, rugged UM-1C

biamplified system consists of a proprietary

12-inch low-frequency driver in a vented

enclosure, and a symmetrical pattern 45-

degree high-frequency horn with driver.

The UM-1C proprietary drivers provide

exceptional efficiency and power handling,

with ultra-low distortion for high clarity.

Very flat frequency response allows control

of feedback at high sound levels.

The sturdy, multi-ply hardwood enclo-

sure with textured finish withstands road

abuse. The unit comes with handles and,

optionally, aircraft-style rigging pan fittings.

The UltraMonitor requires a high-

quality professional stereo power amplifier

capable of delivering up to 250 watts per

channel continuously into 8 ohms, with a

signal voltage gain of 20dB (minimum)

to 30dB (maximum).

— 12

–

— 9

–

— 6

–

— 3

–

— 0

Inches

Features

High gain-before-feedback

Ultra-low distortion

Ultra-flat frequency response

Rugged and reliable

Applications

Stage Monitoring

Clubs and concerts

Low-throw coverage

Fill coverage

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

(510) 486-1166

FAX (510) 486-8356

Note 1:

Measured 1 meter on-axis,

half-space conditions,

pink noise input, in third-

octave bands.

Note 2:

Loudspeaker driven with

weighted noise.

Note 3:

“A”- weighted, unbalanced.

UM-1C Specifications

Acoustical – UM-1C/M-1A System

Frequency Response

70-18,000 Hz +4 dB

Maximum SPL

with amplifier rated at: 250 W/8 ohms/ch. 60 W/8 ohms/ch.

Continuous 125 dB 120 dB

Peak 135 dB 126 dB

HF Coverage, -6dB points 45 degrees symmetrical

UM-1C Loudspeaker

Transducers

Low Frequency MS-12 12-inch cone driver, 8 ohms

High Frequency MS-1401B 1.4-inch throat driver, 16 ohms

High-Frequency Horn 45 degree constant-directivity

HF Network Y-1PD

Function DC blocking and passive filters with alternate connection

terminal to adjust VHF response (16k peak or flat)

Enclosure 0.8 cu. ft. vented, multi-ply Finnish birch

Finish Black textured

Protective Grill Perforated steel screen, charcoal-grey foam covering

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

Rigging (optional) Aircraft pan fittings or

⁄8"-16 nut plates

Physical Dimensions 14" W x 14" H x 22

⁄2" D

Weight 67 lbs. (30.4 kg)

M-1A Control Electronics Unit

Input Type Balanced (active), 47K ohms

Output Type Active push-pull, will drive 600 ohms

Maximum Input/Output Level

Balanced +26 dBu

Unbalanced +20 dBu

Hum and Noise

<-90 dBV

Dynamic Range 120 dB

Sense Inputs 10k ohms true differential, opto-isolated

Electronic Crossover Frequency 1600 Hz

Low-Frequency Delay Type Active all-pass

Driver Protection Circuitry

Low Frequency RMS limiter

High Frequency RMS limiter

VHF Peak limiter

Indicators

Sense, Hi and Lo Green LEDs

Limit, Hi, Lo, and VHF Red LEDs

Safe Green LEDs

Power Supply, Positive and Negative Green LEDs

Controls

Front Panel Input level control, AC on/off switch

Preset Panel VHF control, Lo Cut switch, Safe switch, VHF switch

Connectors

Balanced Inputs/Outputs 3-pin XLR (A-3), RTS

⁄4" phone jacks

Subwoofer Circuit Input Unbalanced,

⁄4" phone jack

(inserts Lo Cut, disables Level control)

Sense Inputs Banana jacks

Power 120/240V AC, 50/60 Hz (internally switchable)

Physical Dimensions 19" W x 1

⁄4" H x 7

⁄4" D Standard rack mount

Weight 8 lbs. (3.6 kg)

The M-1A Control

Electronics Unit

The UM-1C UltraMonitor operates as a

system with the M-1A Control Electron-

ics Unit (one per channel). Optimized for

the UM-1C and UPA-1C loudspeakers

and pre-aligned at the factory, the M-1A

contains frequency response and phase

response alignment circuitry, and Meyer

Sound’s exclusive SpeakerSense

™

driver

protection circuitry, incorporating both

peak and RMS signal limiting.

A single-channel device operating

at line level, the M-1A is the final com-

ponent in the signal chain before the

amplifier.

SpeakerSense driver protection

circuitry protects the UM-1C loudspeaker

components from damage due to over-

heating under high power conditions.

This unique circuit continuously moni-

tors the power applied to the UM-1C

drivers, and individually limits the high-

frequency and low-frequency outputs

when the safe operating limits of the

drivers are exceeded. Until the onset of

overload, the SpeakerSense circuitry

has no effect on the signal.

Also provided is a switch-selectable

Safeguard function, which widens the

safety margin of the system and is in-

tended to be used when extended periods

of overload are anticipated. The Safe-

guard switch and other setup controls

are located behind a cover plate on the

M-1A front panel, providing a means of

securing the system installer’s presets.

To enhance the effectiveness of the

UltraMonitor in stage monitoring applica-

tions, the M-1A incorporates sliding filters

which band-limit the system response

under full-power conditions. This has the

effect of discriminating for vocal informa-

tion in the signal to increase clarity, and

is particularly useful when onstage levels

are high and leakage becomes a problem.

For this reason, it is recommended that

subwoofers be used with the system if it

must pass the full audio frequency range at

all times (as, for example, in keyboard

or drum monitors). The preferred choice

of subwoofer for the UltraMonitor is the

Meyer Sound USW-1.

UltraSeries™ M-1A Power

Sense Limit

Safe

Adj

Lo Cut

Cal

VHF

Var

Safe

∞

10 843

Attn dB

+ -

VHF

Meyer Sound Laboratories has

devoted itself to designing,

manufacturing and refining

components that deliver superb

sonic reproduction. Every part of

every component is designed and

built to exacting specifications and

undergoes rigorous, comprehensive

testing in the laboratories.

Research remains an integral,

driving force behind all production.

Meyer strives for sound quality that

is predictable and neutral over an

extended lifetime and across an

extended range.

Sound

engineering

for the art

and science

of sound.

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

(

510

) 486-1166

FAX (

510

) 486-8356

The compact speaker system shall be

of the two-way type, with a 12" low-

frequency loudspeaker front-mounted in

a ducted bass-reflex hardwood plywood

enclosure, a compression driver

mounted on a high-frequency horn

which has a 1.4" throat, and a separate

Control Electronics Unit.

The Control Electronics Unit shall

contain a power supply capable of

operat-ing from a 120/240V AC, 50/60

Hz line, electronic crossover circuitry,

electronic delay for the phase alignment

of the low-frequency speaker, low- and

high-frequency protection filters which

automatically activate under high power

conditions, RMS limiters which protect

the speakers from overheating, equaliza-

tion circuitry, active balanced input, and

indicator LEDs for power and limiters.

Total harmonic distortion shall be less

than .1%. “A”- weighted noise level shall

be at least 110dB below maximum rated

output of +26 dBu.

The speaker system, its companion

Control Electronics Unit, and a power

amplifier rated at 250 watts/channel into

8 ohms shall meet the following perform-

ance criteria: frequency response, 70 Hz to

18 kHz plus or minus 4 dB measured with

1/3 octave pink noise at 1 meter on axis;

output of 125 dB SPL one meter on axis

with peaks of 135dB SPL when driven with

“A”-weighted noise. Total mid-band har-

monic distortion shall be less than 1% at

110 dB SPL and 3% at 120 dB SPL one

meter on axis. High frequency distribution

pattern, 45 degrees symmetrical.

Speaker enclosure dimensions are

14" W x 14" H x 22

⁄

" D, weight 67 lbs

(30.4 kg).

Control Electronics Unit dimensions are

19" W x 1

⁄

" H 7

⁄

" D, weight 8 lbs (3.6 kg).

The speaker system shall be the Meyer

Sound UM-1C.

The Control Electronics Unit shall be

the Meyer Sound M-1A.

Architectural and

Engineering Specifications UM-1C/M-1A

Physical Dimensions

7.5"

14.0"

7.5"

13.0"

15.0"

11.0"

14.44"

4.13"

22.38"

6.0"

2.2"

2.13"

Connector

(Recessed)

2.63"

18.5"

7.0"

3.18"

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