Manual Rotel RB06 (page 7 of 44) (English, German, Dutch, French, Italian, Spanish)

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English

Speaker Connection

Speaker Selection

We recommend using loudspeakers with a

nominal impedance of 4 ohms or higher with

the RB-06. You should exercise some caution

in driving multiple pairs of speakers in parallel

conﬁguration, because the effective impedance

the ampliﬁer sees is cut in half. For example,

when driving two pair of 8 ohm speakers, the

ampliﬁer sees a 4 ohm load. When driving

multiple speakers in parallel, it is recommended

that you select speakers with a nominal imped

ance of 8 ohms or higher. Speaker impedance

ratings are less than precise. In practice, very

few loudspeakers will present any problems for

the RB-06. See your authorized Rotel dealer if

you have any questions.

Speaker Wire Selection

Use insulated two-conductor stranded wire

to connect the RB-06 to the speakers. The

size and quality of the wire can have an

audible effect on the performance of the

system. Standard speaker wire will work,

but can result in lower output or dimin

ished bass response, particularly over longer

distances. In general, heavier wire will im

prove the sound. For best performance, you

may want to consider special high-quality

speaker cables. Your authorized Rotel dealer

can help in the selection of appropriate cables

for your system.

Polarity and Phasing

The polarity — the positive/negative orientation

of the connections — for every speaker and

ampliﬁer connection must be consistent so all

the speakers will be in phase. If the polarity

of one connection is mistakenly reversed, bass

output will be very weak and stereo imaging

degraded. All wire is marked so you can

identify the two conductors. There may be ribs

or a stripe on the insulation of one conductor.

The wire may have clear insulation with dif

ferent color conductors (copper and silver).

There may be polarity indications printed on

the insulation. Identify the positive and nega

tive conductors and be consistent with every

speaker and ampliﬁer connection.

Stereo Speaker Connection

The RB-06 has two pairs of color coded

binding posts on the back panel. These con

nectors accept bare wire, connector lugs, or

dual banana type connectors (except in the

European Community countries where their

use is not permitted).

Route the wire from the RB-06 to the speakers.

Give yourself enough slack so you can move

the components enough to allow access to the

speaker connectors.

If you are using dual banana plugs, connect

them to the wires and then plug into the backs of

the binding posts. The hexagonal thumbscrews

of the binding posts should be screwed in all

the way (clockwise).

If you are using terminal lugs, connect them

to the wires. If you are attaching bare wires

directly to the binding posts, separate the

wire conductors and strip back the insulation

from the end of each conductor. Be careful

not to cut into the wire strands. Unscrew (turn

counterclockwise) the binding post hexagonal

thumbscrews. Place the connector lug or wire

around the binding post shaft. Turn the hex

agonal thumbscrews clockwise to clamp the

connector lug or wire ﬁrmly in place.

Note: Be sure there are no loose wire

strands that could touch adjacent wires or

connectors.

Bridged Mono Operation

[See Figure 3 for bridged operation jumper

setting and connection illustration.]

The two channels of the RB-06 can be “bridged”.

In this conﬁguration the single channel produces

a massive 180 watts! This feature allows you to

increase the overall power output of your system

by bridging the RB-06 and adding a second

bridged RB-06. Or the RB-06 is bridged to

drive a monophonic subwoofer. Note however

that when the RB-06 is bridged the speaker

connected to it must have an impedance of 8

ohms or more.

In order to use the RB-06 in bridged mode, three

“jumper” connectors inside the ampliﬁer must be

moved from one set of pins to another. This task

should be done by a qualiﬁed technician. See

your authorized Rotel dealer. In addition the

RB-06 is connected to the other components in

a different way. When the RB-06 is setup for

bridged operation the Bridged Mono indicator

light

on the front panel will light.

Resetting Jumpers

Before opening the RB-06 cabinet to reset

the jumpers, the power cord must be un-

plugged from the wall. DO NOT OPEN THE

CABINET OF THE RB-06 BEFORE THE

POWER CORD HAS BEEN UNPLUGGED

FROM THE WALL. FAILURE TO DO SO WILL

EXPOSE YOU TO HAZARDOUS VOLTAG

ES.

After the power cord has been unplugged,

remove the screws that hold the cabinet cover

in place and slide the cover off the ampliﬁer.

Locate the three jumper pin blocks labeled

S 601, S 602 and S 603. The factory standard

(stereo) position of the jumpers is on pins 1

and 2 of each block. There is a * mark on the

circuit board next to this position. To convert the

RB-06 to bridged mono move all three jumpers

so they are on pins 2 and 3 of each jumper

pin block. Replace the cover of the cabinet. Do

not plug the RB-06 power cord back

into the wall outlet until the cabinet

cover has been replaced.

Input Connection

When using the RB-06 in bridged mono mode,

connect the cable from the preampliﬁer output

to the left input. No connection is made to the

right input.

Bridged Speaker Connection

When using the RB-06 in bridged mono mode,

the wire to the speakers is connected to the

positive terminals of the left and right chan

nels. Connect the wire that goes to the positive

terminal of the speaker to the positive terminal

of the left channel of the RB-06. Connect the

wire that goes to the negative terminal of the

speaker to the positive terminal of the right

channel of the RB-06. No connections are made

to the negative terminals of the RB-06.

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Rotel RB06 Manual

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