NM250P - Speaker Montarbo - Free user manual and instructions

USER MANUAL NM250P Montarbo

Abstract geometric diagram with three semicircles and a central circle, no text or symbols present

NM250P

P.A & Monitor

loudspeaker system

MANUALE ISTRUZIONI INSTRUCTION MANUAL BEDIENUNGSANLEITUNG MANUAL DE INSTRUCCIONES MANUEL D'INSTRUCTIONS

ITALIANO 3 - 6

ENGLISH 7 - 10

DEUTSCH 11 - 14

FRANÇAIS 15 - 18

ESPAÑOL 19 - 22

APPENDIX 23 - 30

(1 + ) signal (1 - ) gnd (2 + ) nc (2 - ) nc PARALLEL INPUTS 1 2

The exclamation point in an equilateral triangle, is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the product.

IMPORTANT! SAFETY INSTRUCTIONS

WARNING

In order to protect your own and others' safety and to avoid invalidating this product's warranty, please read this section carefully before operating this product.

- This product has been designed and manufactured to be operated as a speaker system in the typical applications of a sound reinforcement system or of a sound recording system. Operation for purposes other than these is not provided for by the manufacturer and is therefore to be undertaken at the end user's and/or installer's sole risk and responsibility.

TO AVOID THE RISK OF DAMAGE:

• Never expose this product to rain or moisture, never use it in proximity of water or in high humidity conditions. Never let any liquid, as well as any object, penetrate the product. Should this be the case, do not use the speaker system and refer to qualified servicing before operating it again.
• This product must be connected only to the output of a power amplifier or a powered mixer. Always use a good quality speaker cable (unscreened), and check it frequently for any damage to insulation and connectors.
• When setting up the speakers, make sure that the connecting cables do not create any obstruction or danger. As a general rule, never lay them down in any area that may be accessed by the audience or by unqualified personnel. If they are laid on the floor in an accessible area, secure them to the floor using adhesive tape ("gaffa" tape) or insert them in a suitable cable channel.

Make sure that in no case the speaker system can fall down because someone has pushed or stumbled over a speaker cable.

It is recommended to set up the speaker system using suitable accessories (wall mounting brackets, speaker stands, etc.) according to the manufacturer's installed hardware. If the speaker is simply placed on a support, make sure that no harm or damage to people or to goods may be caused by the speaker falling to ground.

When two loudspeakers are laid one upon the other, make sure that stability is guaranteed by matching the upper loudspeaker feet to the lower loudspeaker cavities.

If children and/or animals may have access to the installation site, a close supervision is required.

• Before moving the product after it has been installed, or while it is operating, make sure that the power amplifier is switched off.
• To disconnect this product from connecting cable never pull the cable directly: hold it by the plug instead.

CAUTION!

This product does not contain user serviceable parts.

To prevent damage never open it. For maintenance and repairs always refer to the official Montarbo Distributor in your State or to qualified personnel specifically authorised by the Distributor.

• This product can generate very high acoustic pressures which are dangerous for the hearing system. Always avoid operation at loud levels if anyone is excessively near (less than 1m distance) to the product.
• Never expose children to high sound sources.

ENGLISH

INDEX

Introduction 8

Description 8

Rear panel 9

Important !!! 10

Appendix 23 - 30

Technical Specifications 24
Response curve 25
Block diagram 25
Connections 26 - 27
Applications 28 - 29
▶ Spare parts 30

PACKAGE CONTENTS

NM250P passive system
Owner's manual
Warranty certificate

Introduction

NM250P has been designed to provide really remarkable sonic performance in the most diverse applications. Be it your personal monitor, a small PA for music reinforcement, a conference loudspeaker, to name just a few examples, NM250P is the jack-of-all-trades for musicians, rental companies and installation firms looking for a versatile and space-saving loudspeaker system.

- Design and construction meet a quality standard that is seldom available for products in this category, offering top-level reliability, flexibility and performance.

- Components are custom built to Montarbo specifications to ensure best quality and performance.

- Injection moulded polypropylene cabinet with steel protection grid and two threaded inserts (M8). Recessed carrying handle, stand adaptor with safety lock, mating feet and cavities for safe cabinet stacking and low turbulence tuning ports are all built into the shell of the cabinet. The multiple-angled cabinet's section allows for both vertical and horizontal installation, for both P.A. and stage monitor applications.

Description

L A E B D L C G TOP VIEW NM 250 P Montarbo 200W 5Ω 3/2/W 4/8/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32/33/34/35/36/37/38/39/40/41/42/43/44/45/46/47/48/49/50/51/52/53/54/55/56/57/58/59/60/61/62/63/64/65/66/67/68/69/70/71/72/73/74/75/76/77/78/79/80/81/82/83/84/85/86/87/88/89/90/91/92/93/94/95/96/97/98/99/100 F I H BOTTOM VIEW

A 1" compression driver loaded by a 90° x 60° horn.

B 8" high efficiency woofer.

C Injection moulded polypropylene cabinet.

D Perforated steel grid.

E Tuning ports.

F Transport handle.

G Connection panel.

H Speaker stand adaptor with safety lock.

Internal threaded inserts (M8) for brackets.

L Mating feet and cavities for cabinet stacking.

Construction and components conform to the highest professional standards for maximum reliability.

Rear panel

The system is fitted with both Jack and Speakon® connectors to achieve maximum flexibility.

1 Input jack sockets: they are best suited as for mobile (touring) applications or when it is expected to frequently disconnect the system. The two sockets are parallel connected. Use one of them (at your choice) for connection to the power amplifier or the powered mixer output. Use the other one, if needed, for parallel connection of another speaker system.
2 Speakon ^ connector: this is the better choice for critical installations, because the locking connector avoids accidental disconnection.

Never connect two power amplifiers to the same speaker: doing this may result in serious damage to the amplifier.

(1 + ) signal (1 - ) gnd (2 + ) nc (2 - ) nc PARALLEL INPUTS 1 2

Unscreened Jack connector

1 GND = Ground 2 + = Hot 1 GND 2 + 2 + 1 GND

Wiring of the connection cable to the Speakon® connector:

1 - Strip the cable for 20 mm of length and strip each wire for 8 mm of length. We suggest to use a cable with 1,5 ÷ 2mm^2 section wires (the insert terminals are however suitable for a cable with wires up to a section of 4mm^2/12AWG ).
2 - Insert the cable into the bushing and into the chuck (white chuck for a cable diameter of 5 ÷ 11mm ; black chuck for a cable diameter of 9.50 ÷ 15mm ). Fit a ferrule at the end of each wire and connect wires on the insert.
3 - The wire ends can be clamped in the terminals using a PZ1 screwdriver or soldered. Always pay attention to the symbols shown on the connector body ! : connect the positive wire to the terminal labelled 1+, the negative wire to the terminal labelled 1-. Terminals 2+ and 2- are not used.
4 - After connecting the wires to the insert, lead it through the body and screw down the body with the bushing.

Mating connector is a Neutrik Speakon® model NL4-FC. If not available, model NL2-FC may be used: this version has contacts 1+ and 1-only.

Important !

Product care and maintenance:

• Do not expose the enclosure to heat sources (lamps, lights, high power light sources, radiators or other products that produce heat).
• Never expose the enclosure to direct sunlight, excessive vibrations or mechanical shocks.
• Avoid operating and storing the enclosure in damp or dusty places: this may lead to malfunctions and premature degrading of specifications.
• Care should be taken so that objects do not fall and liquid are not spilled into the enclosure. In public event don't let people, musicians, technicians or anyone put glasses, cups, ashtrays or cigarettes on the enclosure.
• Use a soft brush or a jet of air to clean the enclosure. Do not use alcohol, solvents or detergents.
  • Always leave the protective grille mounted on the enclosure.
• Take care of your connecting cables. Make sure that they are not damaged, knotted or twisted.
• Do not force connectors and controls.
• Before performing any connection, make certain that the power amplifier or the powered mixer are switched off.

Connection to the input sockets.

• Use only loudspeaker cables (unscreened) having suitable cross section (at least 2 × 1 ~mm^2 ) and quality. Do not twist or sharply bend the cables and do not allow for knots to be formed, because they may result in insulation damage.
• When using cables with jack plugs, make sure of using a sturdy type, suitable for speaker use.

Do not use low quality connectors: they may easily lead to short circuits or intermittent contacts.

Parallel connection of two or more systems.

• Connect the second system to the first one using the second (free) socket. Both sockets may be used for input or output. Obviously, it is always possible, if needed, to connect the power amplifier to the first speaker system using the jack sockets, and the first speaker system to the second one using the Speakon® socket or vice-versa.
• PAY SPECIAL ATTENTION TO THE PARALLEL IMPEDANCE: if two systems are parallel connected, the resulting load impedance for the amplifier will be 4 Ohms, a value that is within the allowed range for all power amplifiers and powered mixers manufactured by Montarbo and by other manufacturers. For 3 parallel connected systems, the resulting total impedance decreases to 2,7 Ohms, and for 4 system to 2 Ohms. Some power amplifiers and powered mixers cannot operate reliably with these low values of load impedance. Always check the technical specifications of your amplifier or powered mixer for the value of the minimum load impedance.

(1 + ) signal (1 - ) gnd (2 + ) nc (2 - ) nc PARALLEL INPUTS 1 2

(1 + ) signal (1 - ) gnd (2 + ) nc (2 - ) nc PARALLEL INPUTS 1 2

⚠️ Branchement aux PRISES D'ENTRÉE:

(1 + ) signal (1 - ) gnd (2 + ) nc (2 - ) nc PARALLEL INPUTS 1 2

Conector Jack non protegido

1 GND = Ground 2 + = Hot 1 GND 2 + 2 + 1 GND

Technical Specifications 24

Dati tecnici, Technische Daten, Spécifications techniques, Datos técnicos.

Response curve 25

Curva di risposta, Frequenzkurve, Courbe de réponse, Curva de respuesta.

Block diagram 25

Schema a blocchi, Blockdiagramm, Schéma, Esquema de bloques.

Connections 26 - 27

Collegamenti, Anschlußbeispiele, Exemples de branchement, Ejemplos de connexion.

Applications 28 - 29

Nominal diameter Nominal impedance Power capacity Net weight

- high frequencies Throat diameter:

Nominal impedance: Voice coil diameter: Net weight:

- Impedance

• Frequency response

• Passive crossover

- Sensitivity (1W / 1m)

• Max SPL

Connections

Construction

Dimensions (w x h x d):

Weight:

2-way bass reflex

custom designed

8" high efficiency woofer

8 ^* 8 Ohms 200W 2 Kg

1" compression driver loaded by a 90° x 60° horn

8 Ohms 25mm 800 gr

8 ohm

58Hz ÷ 20kHz

- bass: 58 Hz ÷ 2800 Hz

- mid/high: 2800 Hz ÷ 20kHz

2800 Hz; 12dB/oct

98 dB

121 dB

Dual 1/4" jack + 1 Neutrik® Speakon®

Injection moulded polypropylene.

Steel protection grille. Stand adaptor.

25 x 42,5 x 23 cm

7 Kg

Response curve

Digital Real-time Analyzer MONTARBO
Block diagram

graph TD
    A["SPEAK-ON"] -->|1-2+| B["Channel 1+"]
    A -->|1-2-| C["Channel 2+"]
    A -->|1+2-| D["Channel 1+"]
    B --> E["X-OVER NETWORK"]
    C --> E
    D --> E
    E --> F["TWEETER 1""]
    E --> G["WOOFER 8""]

Connection examples

Example 1: powered mixer (or power amp.) → two NM250P

NM 2.80 PARALLEL INPUTS L R POWERED OUTPUTS YD75

Example 2: powered mixer (or power amp) → four NM250P

graph TD
    subgraph_L["POWERED OUTPUTS"]
        A1["Device 1"] -->|Input 1| B1["Parallel Inputs"]
        A2["Device 2"] -->|Input 2| B2["Parallel Inputs"]
        A3["Device 3"] -->|Input 3| B3["Parallel Inputs"]
    end
    subgraph_R["POWERED OUTPUTS"]
        C1["Device 4"] -->|Input 4| D1["Parallel Inputs"]
        C2["Device 5"] -->|Input 5| D2["Parallel Inputs"]
        C3["Device 6"] -->|Input 6| D3["Parallel Inputs"]
    end
    A1 --> B1
    A2 --> B2
    A3 --> B3
    C1 --> D1
    C2 --> D2
    C3 --> D3
    style L fill:#f9f,stroke:#333
    style R fill:#ccf,stroke:#333

Connection examples

Example 2b: powered mixer (or power amp.) → 2 NM250P + 2 NM250P connected in parallel

graph TD
    A["Device 1"] -->|parallel connections| B["Device 2"]
    B -->|parallel inputs| C["Device 3"]
    C -->|parallel inputs| D["Device 4"]
    D -->|parallel inputs| E["Device 5"]
    E -->|parallel inputs| F["Device 6"]
    F -->|parallel inputs| G["Device 7"]
    G -->|parallel inputs| H["Device 8"]
    H -->|parallel inputs| I["Device 9"]
    I -->|parallel inputs| J["Device 10"]
    J -->|parallel inputs| K["Device 11"]
    K -->|parallel inputs| L["Device 12"]
    L -->|parallel inputs| M["Device 13"]
    M -->|parallel inputs| N["Device 14"]
    N -->|parallel inputs| O["Device 15"]
    O -->|parallel inputs| P["Device 16"]
    P -->|parallel inputs| Q["Device 17"]
    Q -->|parallel inputs| R["Device 18"]
    R -->|parallel inputs| S["Device 19"]
    S -->|parallel inputs| T["Device 20"]
    T -->|parallel inputs| U["Device 21"]
    U -->|parallel inputs| V["Device 22"]
    V -->|parallel inputs| W["Device 23"]
    W -->|parallel inputs| X["Device 24"]
    X -->|parallel inputs| Y["Device 25"]

Example 3: mixer AUX output → power amp. input • power amp. output → 1 NM250P

graph TD
    A["Audio Device"] -->|input| B["POWER AMPLIFIER"]
    B --> C["AUX OUTPUT"]
    C --> D["MIXER"]

Applications

- live music...

Illustration of a person playing a radio on a stand with two speakers in the background (no text or symbols)

Line drawing of a music class with musicians playing on stage and singing into a microphone (no text or symbols)

- karaoke...

• sound reinforcement for churces,

Line drawing of a funeral scene with a central incense burner, flanked by two rows of people, and an altar above (no text or symbols)

6

• theatres, auditoriums ....

Line drawing of a lecture or presentation with a presenter at a podium and audience members seated, no visible text or symbols.

Applications

- piano-bar, restaurants, clubs....

- conference...

- gymnasium...

Spare parts

D512501 Connection panel D00360K PC360K Inputs D10250P Filter A300219 1" compression driver D20SAT2 Perforated steel grid A300168 8" woofer

Parti di Ricambio, Ersatzteile, Piezas de Repuesto, Pièces de rechange:

A300219:

Driver a compressione da 1" / 1" Kompressionsdriver Driver de compresión de 1" / Driver de compression de 1"

A300168:

Abstract geometric diagram with three semicircles and a central circle, no text or symbols present

The information contained in this manual has been carefully drawn up and checked. However no responsibility will be assumed for any inexactitude.

This manual can not cover all the possible contingencies which may arise during installation and use of the product. Should further information be desired, please contact us or our local distributor.

Elettronica Montarbo srl can not be considered responsible for damages which may be caused to people and things when using this product.