RBH Sound MC-615-70 Bedienungsanleitung

COMMERCIAL SPEAKERS

O w n e r s M a n u a l

Introduction

Congratulations on your purchase of an RBH Commercial 70 Volt speaker! Your

speaker is the result of many years of research and development dedicated to

producing high quality products for home audio and audio/video systems.

This manual contains features, installation procedures and speciﬁcations for the

Commercial 70 Volt speaker. We recommend that you thoroughly read through

the material contained in this manual before connecting your speaker. This will

ensure that you have an understanding of how to install the speaker for optimum

performance.

Break-in Period

Allow 10-15 hours of listening time to adequately break-in the speaker. As the

speaker breaks-in, the driver suspension will loosen. The result of break-in will be

an increase in low frequency response, improved deﬁnition, and increased clarity

and detail.

Care and Cleaning

To maintain speaker appearance, we recommend wiping them down with a clean

damp soft cloth. To clean dust from the grille cloth, use a vacuum with a brush

attachment.

Commercial Speakers

MC-615-70 A-615-70

Features

The RBH Commercial speaker consist of two models, the MC-615-70 and the A-615-

70 Both models incorporate metal enclosures to reinforce bass frequencies allowing

a deeper and more controlled bass response. Both models also utilize an acoustic

suspension design and offer operation in either 8 Ohm or 70 volt modes.

A powerful magnet, extended voice coil and bumped back plate give the bass/

midrange drivers high excursion capability. This ensures accurate dynamic

reproduction. The MC-615-70 uses a proprietary aluminum woofer and tweeter. The

special aluminum cone material combines stiffness, low mass and self damping

properties in a manner that allows virtually uncolored presentation of program

material. Both tweeters feature Ferro Fluid™ liquid cooling to allow greater power

handling.

Steep acoustic slope crossovers are used to integrate drivers. The use of steep

crossover slopes allows high power handling, minimizes driver interaction anomalies,

and maximizes the clarity with which each driver is able to produce its respective

frequency band. Sophisticated computer modeling techniques are used extensively

in the RBH speaker design process.

A switch connected to the tweeter allows you to custom tailor the sound of your

speaker. This switch is located next to the woofer on the front bafﬂe of the speaker

and has three positions: +3dB, 0, and -3dB. The +3 position increases output of the

tweeter, the -3 position decreases the output of the tweeter relative to the woofer.

The 0 position is the factory setting and generally provides the most natural

response from the speaker.

The use of a 70 volt transformer allows many speakers to be used together by

running a connecting wire from one speaker to the next, without concern for the

impedance seen by the ampliﬁer. A 70 volt ampliﬁer must be used to accomplish

this. Please refer to the following pages for instruction and wiring diagrams to

properly install a 70 volt system.

The Removal Connector

This connector detaches from the main housing of the

speaker for ease in connecting the speaker wire. The

bare wire must be inserted and securely fastened by

tightening the screws. The connector has 4 terminals as

shown in the diagram below.

Positions 2 and 3 are inputs from either the ampliﬁer

or a previous speaker. They are the same inputs used

for 8 Ohm operation. Positions 1 and 4 are outputs to

succeeding speakers in 70 volt operation. We suggest carefully reading the Wiring

Diagrams section of this manual to determine the best wiring scheme for your

particular installation.

This removable connector will accept a maximum wire gauge of 14 AWG and a

minimum wire gauge of 18 AWG. Please refer to the NEC (National Electrical Code)

for further information regarding the permissible wire size.

Wiring Diagrams

Parallel Connection

Connect the speaker wire going to succeeding speakers to positions 2 and 3 as

shown in the diagram below. If needing to service system, this will allow the

removable connector to be removed from the speaker with all other speakers in the

line continuing to play and operate normally.

Loop Thru

Positions 1 and 4 are internally connected to positions 2 and 3 as shown in the

below diagram. This allows connections to succeeding speakers using positions 1

and 4. If the system needs, removing the removable connector from one speaker

will cause all succeeding speakers to stop playing.

Voltage Selector

As previously mentioned, the A-615-70 and MC-615-

70 can be used in a 70 volt system or as a standard

8 Ohm in-ceiling speaker The voltage selector knob

allows you to properly set the speaker to 8 Ohm

operation or to choose from 2, 4, 8, 16 and 32 Watt

taps in 70 volt operation.

In 70 volt operation, be sure to appropriately set

the selector according to the power output of

the ampliﬁer being used and the number of speakers being installed. In 8 Ohm

operation, be sure to set the selector to the 8 Ohm setting A picture of the voltage

selector (set to 8 Ohms) is shown above.

The pictures below depict the proper way to insert and tighten down the wire in

the strain relief ﬁtting.

Strain Relief

Safety Compliance

Installation

IMPORTANT: This product must be installed in accordance with your local area’s

building codes and regulations. This may require use of an additional support bracket,

depending on the installation In this case, use the MBR-70 described below.

SEISMIC TAB:

For proper installation, the seismic tab MUST be secured to a secondary support in

the event of failure of the primary support structure.

MBR-70 (sold separately)

The MBR-70 consists of a round bracket and two rails

designed to be used with suspension ceilings. The rails

will ﬁt either a 24-inch or 600 millimeter tile. They

are designed to rest on top of the tile without the “V”

end of the rail grabbing the grid struts In the event

that the tile falls, the “V” end of the rail will grab the

strut holding the speaker in place. The MBR-70 is not

required for installation when the speaker is being installed in drywall or other

rigid material. When installing in these surfaces, use attached swivel mounts and

hole locating template included in the box with each speaker.

For suspension ceiling installation instructions, refer to the installation manual

included with the MBR-70.

MRB-70 Bracket

UL LOGO: Complies with the requirements of UL-2043 ﬁre tests for heat and visible

smoke and visible smoke release for discrete products and the accessories installed

in air handling spaces, NFPA-70 National Electric Code 2002, Article 300-22 (C), and

NFPA-90A installation of air conditioning and ventilation systems, Section 2-3.10.1

(a), Exception 3 Listed UL1480 Speakers for professional/commercial use.

CE LOGO: These products are in compliance with the EMC Directive 89/336/EEC and

Article 10 (1) of the directive. In compliance with Technical Regulations EN55013-1

and EN50082-1.

8 Ohm Operation A615-70 MC615-70

Frequency Response: 55Hz - 20kHz 50Hz - 20kHz

Sensitivity: 90dB 1 watt/1 meter 88dB 1 watt/1 meter

Recommended

Ampliﬁer Power:

20-80 Watts 20-120 Watts

Maximum Power

Handling:

50 Watts 50 Watts

Woofer: (1) 6½” Polypropylene (1) 6½” Aluminum Cone

Tweeter: (1) 1” Silk Dome (1) 1” Aluminum Dome

Crossover Frequency: 3000 Hz 3000 Hz

Filter Slope: 12 dB/octave 12 dB/octave

Impedance: 8 Ohms 8 Ohms

Finished Dimensions: 10¼” Diameter

9½” Depth

10¼” Diameter

9½” Depth

Cutout Dimensions: 8¾” Diameter 8¾” Diameter

Weight: 8 lbs. 8 lbs.

70 Volt Operation A615-70 MC615-70

70 Volt Taps: 2, 4, 8, 16, 32 Watts 2, 4, 8, 16, 32 Watts

Specications

Troubleshooting

Situation: Probable Cause: Solution:

No sound from speakers Speaker wire not

connected

Speaker selector on

ampliﬁer is not on

Make sure wire is

connected at both the

speaker and the ampliﬁer

observing proper polarity

Activate proper selector

on ampliﬁer

No sound from speaker Balance control on

receiver or pre-amp is

not centered

Speaker wire not securely

connected

Place balance control in

the center

Check all connections at

ampliﬁer and speakers

Very little bass and/or

imaging

Speakers are wired out

of phase

Check entire system

for proper polarity and

make adjustments as

necessary

Warranty

Your RBH Sound Commercial speaker is covered by a limited warranty against

defects in materials and workmanship for a period of 25 years from the original

date of purchase. This warranty is provided by the authorized RBH Sound dealer

where the speaker was purchased. Warranty repair will be performed only when

your purchase receipt is presented as proof of ownership and date of purchase.

Defective parts will be repaired or replaced without charge by your dealer’s store or

the location designated by your dealer authorized to service RBH Sound products.

Charges for unauthorized service and transportation cost are not reimbursable

under this warranty. This warranty becomes void if the product has been damaged

by alteration, misuse or neglect. The warrantor assumes no liability for property

damage or any other incidental or consequential damage whatsoever which may

result from the failure of this product. Any and all warranties of merchantability

and ﬁtness implied by law are limited to the duration of this express warranty.

Some states do not allow limitations on how long an implied warranty lasts, so the

above limitations may not apply to you. Some states do not allow the exclusion

or limitation of incidental or consequential damages, so the above limitation or

exclusion may not apply to you.

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