Manual Rotel RB-1552 (page 8 of 48) (English, German, Dutch, French, Italian, Spanish)

489970

Zoom out

Zoom in

1/48

RB-1552 / RB-1582 Stereo Power Ampliﬁer

12V Trigger Input and Output

The jack labeled IN is for connecting the 3.5mm Plug/Cable carrying

a +12 volt trigger signal to turn the ampliﬁer on and off. To use this

feature the toggle switch must be set to the ON position. This input

accepts any control signal (AC or DC) ranging from 3 volts to 30 volts.

The jack labeled OUT is for connecting another 3.5mm plug/cable

to provide a 12V trigger signal to other components. The 12V output

signal is available whenever a +12 volt trigger signal is applied to the

IN connector.

Protection Circuitry

The RB-1552 and RB-1582 feature thermal and over-current protection

circuits that protect against potential damage in the event of extreme

or faulty operating conditions. Unlike many designs, these protection

circuits are independent of the audio signal and have no impact

on sonic performance. Instead, the protection circuits monitors the

temperature of the output devices and the current they are handling

and shuts down the ampliﬁer if operating conditions exceed safe

limits.

Most likely, you will never see this protection circuitry in action.

However, should a faulty condition arise, the ampliﬁer will stop

playing and the LED indicator on the front panel will light up.

If this happens, turn the ampliﬁer off, let it cool down for several

minutes, and attempt to identify and correct the problem that caused

the protection circuitry to engage. When you turn the ampliﬁer back

on, the protection circuit will automatically reset and the indicator LED

should go out.

In most cases, the protection circuitry activates because of a fault

condition such as shorted speaker wires, or inadequate ventilation

leading to an overheating condition. In very rare cases, highly reactive

or extremely low impedance speaker loads could cause the protection

circuit to engage.

If the protection circuitry triggers repeatedly and you are unable to

isolate and correct the faulty condition, contact your authorized Rotel

dealer for assistance in troubleshooting.

Input Signal Connections

The RB-1552 and RB-1582 have conventional RCA type input

connectors, the type found on nearly all audio equipment.

Note:

To prevent loud potentially damaging noises, make sure the

amplifier is turned off when you make any changes to the input

signal configuration.

Select high quality audio interconnect cables. Connect each of the

outputs from the preampliﬁer or signal processor to the corresponding

input of the ampliﬁer.

Speaker Connection

Speaker Selection

We recommend using loudspeakers with a nominal impedance

of 4 ohms or higher with the RB-1552 and RB-1582. 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

impedance of 8 ohms or higher. Speaker impedance ratings are

less than precise. In practice, very few loudspeakers will present any

problems for the RB-1552 or RB-1582. See your authorized Rotel

dealer if you have any questions.

Speaker Wire Selection

Use insulated two-conductor stranded wire to connect the ampliﬁer 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 diminished bass response,

particularly over longer distances. In general, heavier wire will

improve 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 different color conductors (copper

and silver). There may be polarity indications printed on the insulation.

Identify the positive and negative conductors and be consistent with

every speaker and ampliﬁer connection.

Speaker Connection

The RB-1552 and RB-1582 have four pairs of color coded binding

posts, two for each channel. These connectors 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 ampliﬁer 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 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. Place the connector lug or wire

around the binding post shaft. Turn the binding post 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.

Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

Forumrules

To achieve meaningful questions, we apply the following rules:

First, read the manual;
Check if your question has been asked previously;
Try to ask your question as clearly as possible;
Did you already try to solve the problem? Please mention this;
Is your problem solved by a visitor then let him/her know in this forum;
To give a response to a question or answer, do not use this form but click on the button 'reply to this question';
Your question will be posted here and emailed to our subscribers. Therefore, avoid filling in personal details.

new questions and answers
new manuals

You will receive an email to register for one or both of the options.

Get your user manual by e-mail

Enter your email address to receive the manual of Rotel RB-1552 in the language / languages: English, German, Dutch, French, Italian, Spanish as an attachment in your email.

The manual is 2,46 mb in size.

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.

Info

Rotel RB-1552 Manual

Product: