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Montarbo W20A User Manual

Montarbo W20A
16 pages
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W20
A
bi-amped
speaker system
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Montarbo W20A Specifications

General IconGeneral
BrandMontarbo
ModelW20A
CategorySpeaker System
LanguageEnglish

Summary

Safety Instructions and Warnings

General Safety Warnings

Read safety instructions carefully before operating to protect yourself and avoid warranty invalidation.

User Serviceability and Maintenance Caution

Product has no user-serviceable parts; refer servicing to qualified personnel.

Introduction to the W20 A Speaker System

Product Description and Components

Details the physical construction, components, and design features of the W20A.

Construction Material and Finish

High-grade birch plywood construction with phenolic glue and polyurethane paint.

High Frequency Horn and Driver

Constant directivity horn with 60°x40° dispersion and 2" dynamic driver.

Low Frequency Woofers

Features two 10-inch high efficiency woofers for bass frequencies.

Protective Steel Grid

Powder-coated, perforated steel grid for driver protection.

Bass Reflex Ports

Bass reflex enclosure with tuning ports for enhanced low-frequency response.

Ergonomic Handles

Side recessed handles for easy portability and handling.

Control and Connection Panel Location

Identifies the location of the rear control and connection panel.

Speaker Stand Mounting

Integrated adapter for mounting the speaker on a standard stand.

Control and Connection Panel Overview

Input and Output Connectors

Details XLR/Jack parallel input/output sockets for flexible connectivity and daisy-chaining.

Main Volume Control

Adjusts the input levels of the two built-in power amplifiers for mixer output matching.

High Frequency Level Adjustment

Control for adjusting the high frequencies level, with recommended setting for OdB mixers.

Power Switch

The main power switch for turning the unit on and off.

Ground Lift Switch

Lifts signal ground from chassis to reduce hum caused by ground loops.

Power Input and Fuse Holder

IEC power socket for mains connection, includes a built-in fuse.

Important Operational and Care Instructions

Product Care and Maintenance Guidelines

Avoid heat, direct sunlight, moisture, dust, and electromagnetic interference for longevity.

Power Supply Connection Requirements

Ensure system is off, voltage matches, and use a grounded three-wire cord.

Mixer Connection Procedures

Use shielded cables, switch off before connecting, and follow specific instructions for balanced/unbalanced outputs.

Parallel Connection Guidelines

Use heavy gauge, shielded cables for parallel connections, either XLR or Jack.

Appendix and Reference Information

Technical Specifications

Detailed specifications for the W20 A speaker system.

System Block Diagram

Visual representation of the internal signal flow and components.

Connector Types and Pinouts

Explains the various connector types used on the system.

Connection Examples

Illustrates typical connection scenarios for the W20 A.

Spare Parts List

Lists available spare parts for the W20 A speaker system.

Detailed Technical Specifications

Speaker System Components

Lists the components of the 2-way bass reflex speaker system.

Bass Frequency Components

Details the specifications of the 10-inch woofers used in the system.

Mid/High Frequency Components

Details the specifications of the 2-inch driver and horn.

Impedance Specifications

Lists the impedance for bass and mid/high frequency sections.

Frequency Response

Provides the frequency response range for the system.

Sensitivity Rating

Specifies the sensitivity of the speaker system.

Maximum SPL

Indicates the maximum Sound Pressure Level achievable.

Electronic Crossover Specifications

Details the crossover frequency and slope of the internal crossover.

Power Amplifier Specifications

Lists the maximum output power for bass and mid/high amplifiers.

Full Frequency Response

Overall frequency response of the combined bass and mid-high sections.

Input Impedance

Specifies the input impedance of the speaker system.

Input Sensitivity

Indicates the required input signal level for nominal output.

Noise Specification

Specifies the noise level referred to the input.

Power Supply Requirements (EU/Asia)

Specifies voltage and frequency for Europe and Asia.

Power Supply Requirements (USA/Canada)

Specifies voltage and frequency for USA and Canada.

Fuse Rating (EU/Asia)

Specifies the fuse rating for Europe and Asia.

Fuse Rating (USA/Canada)

Specifies the fuse rating for USA and Canada.

Available Connections

Lists the types of balanced inputs available.

Construction and Finish Details

Describes the materials and finish used for the enclosure.

Physical Dimensions

Provides the width, height, and depth of the speaker system.

Product Weight

Specifies the total weight of the speaker system.

System Block Diagram Analysis

Woofer Connection in Block Diagram

Shows the connection of the 10" 8-ohm woofer.

Second Woofer Connection

Illustrates the connection of the second 10" 8-ohm woofer.

Driver and Horn Connection

Depicts the connection of the DE750 driver and ME60 horn.

Crossover Network Function

Shows the 24dB crossover network and its role in signal division.

Power Supply Block

Identifies the power supply unit within the system diagram.

Power Switch in Diagram

Shows the location of the power switch in the block diagram.

Fuse Representation

Indicates the fuse within the block diagram.

Power Amplifier Blocks

Illustrates the two MOSFET power amplifier stages.

Passive Crossover Stages

Shows the passive crossover stages after the amplifiers.

A.S.P. Functionality

Represents the Acoustic System Processor (A.S.P.) stages.

Limiter Stages

Indicates the limiter circuits within the amplifier paths.

Input Volume Control

Shows the input volume control in the signal path.

Balanced Input Stage

Represents the balanced input stage of the system.

Link Connections

Shows the link output/input connections for daisy-chaining.

Connector Types and Wiring Details

Balanced XLR Male Connector

Details the pinout for the balanced XLR male connector.

Balanced Connector Pinouts

Explains the standard pinout for balanced connectors (GND, Hot, Cold).

Balanced Jack Connector

Details the pinout for the balanced jack connector.

Balanced XLR Female Socket

Shows the pinout for the balanced XLR female socket.

Balanced XLR Male Socket

Shows the pinout for the balanced XLR male socket.

Balanced Jack Sockets

Illustrates the balanced jack sockets on the panel.

Unbalanced Connector Pinouts

Explains the pinout for unbalanced connectors (GND, Hot, Ground).

Connection Examples and Scenarios

Daisy-Chaining W20A Systems

Illustrates how to connect multiple W20A units in a chain (OUT to IN).

Connecting to Mixing Console

Shows how to connect the W20A input to a mixer's output.

Spare Parts Identification and Ordering

Spare Woofer Part Number

Lists the part number for the 10" high efficiency woofer.

Spare Driver Part Number

Lists the part number for the DE750 driver.

Spare Horn Part Number

Lists the part number for the ME60 high frequency horn.

Spare Coil Part Number

Lists the part number for the 0.7 mH coil.

Spare 2-Way Filter Part Number

Lists the part number for the 2-way filter.

Amplifier Chassis Parts

Lists components related to the amplifier chassis, like transformer and heat sink.

Spare Control Panel Part Number

Lists the part number for the control and connection panel.

Spare Steel Grid Part Number

Lists the part number for the powder coated steel grid.

Spare Stand Holder Part Number

Lists the part number for the stand holder.

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