MR 55 - Speaker RCF - Free user manual and instructions

Product type	Compact 2-way speaker
Brand	RCF
Model	MR 55 (MONITOR 55)
Dimensions (W x H x D)	172 x 270 x 187 mm
Net weight	3.9 kg
Power source	Passive, via external amplifier (impedance 4 Ω)
Power handling	175 W (IEC 268-1)
Nominal impedance	4 Ω
Frequency response	65 Hz - 23 kHz (±2 dB)
Crossover frequency	3000 Hz
Coverage angle	110° x 110°
Sensitivity (1W/1m)	87 dB SPL
Maximum SPL	109.5 dB at 1 m
Woofer	130 mm (5") woofer with carbon fiber cone
Tweeter	19 mm (0.75") dome tweeter with horn loading
Cabinet material	High-density plastic
Protective grille	Steel
Connectors	Gold-plated banana plugs
Wall mounting	Articulated joint bracket supplied, 4 M6 inserts
Available colors	Matte black (MR 55), White (MR 55W)
Applications	Indoor and outdoor, PA, background music
Maintenance and cleaning	Clean with a dry cloth, avoid water and humidity
Safety	Professional installation, do not repair yourself, comply with standards, hearing protection
Spare parts and repairability	Contact RCF after-sales service

Frequently Asked Questions - MR 55 RCF

How to connect the MR 55 speaker to an amplifier?

Use the gold-plated banana plugs or bipolar cables of adequate cross-section (max diameter 6 mm). Connect the red terminal (+) to the positive output of the amplifier and the black terminal (-) to the negative. Respect phase for good musical reproduction.

What is the impedance of the MR 55 speaker?

The nominal impedance is 4 Ω. Make sure your amplifier supports this impedance.

How to install the speaker on the wall?

Use the supplied articulated joint bracket. Attach it to the M6 threaded inserts located on the bottom, top, and rear sides. Ensure the supporting structure can bear at least 5 times the weight of the speaker.

What is the maximum power handling of the speaker?

The applicable power is 175 W (according to IEC 268-1). Do not exceed this value to avoid permanent damage.

Can I use the speaker outdoors?

Yes, the speaker is designed for indoor and outdoor use. However, avoid direct exposure to water and excessive humidity.

How to clean the MR 55 speaker?

Use a dry cloth to clean the surface. Never use water, solvents, or abrasive products that could damage the cabinet or grille.

What to do if the speaker is damaged?

If the speaker appears damaged, do not use it and contact your dealer or the nearest RCF after-sales service. Do not attempt to repair it yourself.

What is the frequency response of the speaker?

The frequency response is 65 Hz to 23 kHz (±2 dB) and extends from 55 Hz to 25 kHz at -10 dB.

Is the speaker delivered with a wall mount?

Yes, the articulated joint bracket for wall mounting is included in the packaging (black for MR 55, white for MR 55W).

What types of connectors are available on the speaker?

The speaker is equipped with gold-plated banana plugs that accept single or double banana plugs, or bipolar cables.

USER MANUAL MR 55 RCF

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Collegamenti

Diagram illustrating the working principle of a battery assembly, showing components before and after disassembly.

Messa in fase

87dB SPL in camera anecoica

Massimo SPL:

109.5 dB 1 m in camera anecoica

(175 W IEC Long-Term)

Impedenza:

4 ohm

Frequenza crossover:

3000 Hz

Tipo di filtro:

Dimensioni (L x H x P):

187 × 270 × 172 mm

(7.36" x 10.62" x 6.77")

Volume interno:

4.5 litri

Colore:

Nero opaco (MONITOR 55)

Bianco (MONITOR 55W)

Peso:

3,9 kg (8,6 lb)

Connettori:

Connettori dorati

Impiego:

Interno – Esterno

Before installing and using this product, please read this instruction manual carefully and keep it on hand for future reference. Follow all the instructions to the letter.

WARNING: This product has been designed for installation only by qualified personnel having the technical know-how and experience or specific instructions to ensure correct execution of all the operations involved and to prevent any risk to personal safety. There are numerous factors that must be taken into consideration when installing a professional sound system, including mechanical and electrical evaluations as well as studies related to coverage and acoustic performance. Therefore strongly recommend that you have this product installed only by professional installers or specialized firms.

1. Attention to the precautions – Always follow the precautions provided on this product and in the instruction manual.
2. Water and humidity – Do not use this product near water; for example, in the vicinity of a bath tub or sink, in a damp cellar, near a swimming pool, etc..
3. Foreign bodies and liquids – Be careful not to allow any foreign bodies or liquids to get into this product.
4. Technical service – The user should never attempt to make any repairs on this product unless otherwise indicated in the instruction manual. All repairs should be made by qualified service technicians.

5. Installation – Do not install this product in any way that is not provided for in the instruction manual.

6. Stacking multiple units – To prevent the danger of falling equipment, never stack multiple units of this product unless this possibility is expressly indicated in the instructions.

7. Respect the safety standards – The entire sound system must be created in compliance with the current standards and laws regarding electrical systems.
8. Specifications – When installing and using this product, keep in mind the technical specifications indicated in the dedicated section of this instruction manual.
9. Accessories – Install and use this product only with the accessories specified by the manufacturer or supplied with the product.

Hearing loss - Exposure to high sound levels can cause permanent hearing loss. The sound pressure level which leads to hearing loss varies considerably from one person to another, and depends on the duration of exposure. The U.S. Government's Occupational Safety and Health Administration (OSHA) has established the maximum sound pressure levels that can be with stood without causing damage, which are shown in the table below. According to the OSHA regulations, any exposure over the maximum limits indicated in the table can reduce the hearing capacity of a person. To prevent potentially dangerous exposure to high sound pressure levels, anyone subjected to such levels must use suitable protection. When an product capable of producing high sound levels is being used, it is therefore necessary to wear ear plugs or protective earphones when the limits shown in the table are exceeded.

Duration per day (hours)	Sound level (dBA)	Typical example
8	90	Duet in a small club
6	92
4	95	Underground train
3	97
2	100	Classical music played at high volume
1.5	102
1	105
0.5	110
0.25 or less	115	Particularly "hard" music at a rock concert

Consult the specifications provided in the instruction manual to know the maximum sound pressure (SPL) the speaker is capable of producing.

Unpacking the speaker

Remove the speaker carefully from its packaging to avoid damaging it. Should the speaker appear to be damaged, put it back in the original packaging and take it immediately to your dealer or to the nearest RCF S.p.A.

Description

The MONITOR 55 (Black) and MONITOR 55W (White) are a compact two-way speaker system designed for constant-impedance system. The 5" (130 mm) carbon fiber woofer, in combination with a 0.75" (19 mm) soft dome tweeter mounted on a 110° x 110° constant directivity horn, provide natural, smooth sound reproduction, ideal for use in business music systems and indoor/outdoor background music applications.

The passive crossover is designed to reduce heat dissipation and optimise the power response of the loudspeaker. The connections are made using gold plated banana terminals or bipolar cables having a suitable cross-section.

The enclosure is constructed of high-density plastic, with M6 threaded inserts for use with the optional mounting hardware, and includes a protective perforated steel grille.

Installation

The special hexagonal shape of the cabinet makes it possible to position the speaker in various way, as shown in the figure. The RCF plate on the front protective grille can be rotated to adapt it to the position of the speaker.

The speaker bodyhasfour M6 threaded inserts, one each on the top and bottom and two on the back, used for attaching accessories for installing the speaker in different ways.

The MONITOR 55 and MONITOR 55W speakers are supplied with a black (white) ball joint support for wall mounting.

M6 M6 M6 M6

WARNING - Consult a professional rigger or structural engineer prior to suspending loudspeakers from a structure not intended for that use. Always know the working load limit of the structure supporting the loudspeaker array. Always make sure that the rigging hardware minimum rating is at least five times the actual load.

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Connections

The gold-plated banana jacks are designed to accept single or double banana plugs and two-pole cables. They provide a method of quickly connecting and disconnecting speaker cables to and from the speaker. Double banana plugs have a tab on own side to indicate the ground (GND) side of the connector.

The side connects to the negative (-) terminal. If you use bipolar cables, we recommend choosing cables that have a suitable cross-section (maximum diameter 6mm), as poor quality cables or those of unsuitable size may cause power loss and sound degradation.

Diagram illustrating the assembly of a battery component with labeled parts and directional arrows indicating assembly steps.

Phasing

For the best musical reproduction, it is essential that the speakers be connected in phase.

For this purpose, the terminals of the MONITOR are marked with red (+) or black (-) rings.

Make sure that you connect the terminal with red ring to the corresponding speaker terminal on the amplifier (+, POS), and follow the same procedure for the terminal with black ring.

In general, remember that the speaker positioned to the right of the ideal listening point must be connected to the RIGHT channel of the amplifier and the speaker on the left to the LEFT channel.

MONITOR 55 / 55W OUTPUTS L R MONITOR 55 / 55W

Specifications

Enclosure:

2 - way reflex system

Long-Term power handling*:

175 W (IEC268-1)

Frequency response:

Sensitivity (1W / 1m):

87dB SPL in anechoic chamber

Max SPL:

109.5 dB 1 m in anechoic chamber.

(175 W IEC Long-Term)

Impedance:

4 ohm

Crossover frequency:

3000 Hz

Crossover:

12/18 dB/oct low impedance

compensated crossover.

Components:

Low frequency : 5" (130 mm)

carbon fiber woofer.

High frequency : 0,75" (19 mm)

driver loaded by

110^ × 110^ constant directivity horn.

Tuning frequency:

65 Hz

Coverage angle:

110^ × 110^ (horn directivity)

Protection:

Dynamic on tweeter

Enclosure material:

High density plastic

Dimensions (L x H x P):

7.36" x 10.62" x 6.77"

(187 x 270 x 172 mm)

Internal volume:

4.5 l

Colour:

Matt black (MONITOR 55)

White (MONITOR 55W)

Weight:

3,9 kg (8,6 lb)

Connectors:

Gold-plated terminals

Application:

Indoor – Outdoor

* Long term maximum input power is determined by submitting the speakers to a power test lasting 1 hour, in which a special signal (IEC268-1) is applied 20 times for 1 minute each, with an interval of 2 minutes between one application and the next. The special signal is generated by filtering pink noise with a weighting device that makes a cut with 12 dB/octave slope below 55 Hz and above 5 kHz, and maintains the 6 dB peak/average ratio. The maximum power the speaker is able to withstand without any permanent damage is taken as the value of long-term maximum input power.

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Connexions

Diagram illustrating the process of battery charging and discharging, showing components before and after discharging.

Mise en phase

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Anschlüsse

Diagram illustrating the installation and disassembly of a battery, showing components before and after assembly.

109.5dB SPL in schalltoter Kammer

(175 W IEC Long-Term)

Impedanz:

4 ohm

Crossover-Frequenz:

3000 Hz

Vergoldete Anschlüsse

Anwendungsgebiet:

Innen / außen

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Conexiones

Diagram illustrating the process of battery charging and discharging, showing components before and after discharging.

Puesta en fase

(175 W IEC Long Term)

Impedancia:

4 ohm