Input Signal Connections

[See Figure 2.]

NOTE: To prevent loud noises that neither you nor your speakers will appreciate, make sure the system is turned off when you make any signal connections.

Phono Input e and

Ground Connection w

Plug the cable from the turntable into the ap- propriate left and right phono inputs. If the turntable has a “ground” wire connect it to the screw terminal to the left of the Phono inputs. It will help prevent hum and noise.

Line Level Inputs r

The CD, Tuner, and Aux inputs of the RA-03 are “line level” inputs. These are for connect- ing components such as CD players, Hi Fi or NICAM Stereo video cassette recorders, tuners, Laser Disc players or the analog output from a CD ROM drive.

The Left and Right channels are labeled and should be connected to the corresponding channels of the source component. The Left connectors are white, the Right connectors are red. Use high quality RCA cables for connecting input source components to the RA-03. Ask your authorized Rotel dealer for advice about cables.

Recorder Connections t

[See Figure 2.]

The Tape inputs and outputs can be connected to any record/playback device that accepts standard line level analog input and output signals. Typically that will be a conventional tape recorder.

When connecting a recorder to the RA-03 remember that the outputs of the recorder must be connected to the tape inputs of the RA-03. Similarly the tape outputs of the RA-03 must be connected to the inputs of the recorder. As with other sources be sure to connect the Left and Right channels of each device to the proper channels on the associated components. Use high quality connecting cables to prevent loss of sound quality.

7

Preamp Outputs y

The RA-03 has a set of preamp outputs. The signal from the source selected with the Func- tion Selector is always available from these outputs. Typically these outputs are used to provide a signal to another integrated ampli- fier or power amplifier, which is used to drive remote speakers

NOTE: Changes to the settings of the Volume, Balance or Tone controls affect the signal from the Preamp Outputs.

Speaker Outputs u i Speaker Selector Switch 6

[See Figure 2.]

The RA-03 has two sets of speaker outputs, labeled “A” u and “B” i. The speaker outputs are controlled by the switch 6 on the front panel.

Speaker Selection

If only one set of speakers will be used at any given time, the speakers may have an imped- ance as low as 4 ohms. If there are times when both the A and B speakers will be used, all the speakers should have an impedance of 8 ohms or more. Speaker impedance ratings are less than precise. In practice, very few loudspeakers will present any problems for the RA-03. See your authorized Rotel dealer if you have any questions.

Speaker Wire Selection

Use insulated two-conductor stranded wire to connect the RA-03 to the speakers. The size and quality of the wire can have an audible effect on the performance of the system. Stan- dard 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 cables for your system.

English

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 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

Turn off all the components in the system before connecting the speakers. The RA-03 has color- coded binding post type speaker connectors on the back panel (except in European Community countries where their use is not permitted). These connectors accept bare wire, connector lugs, or dual banana type connectors.

Route the wire from the RA-03 to the speakers. Give yourself enough slack so you can move the components 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 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 the insulation from the end of each conductor. Be careful not to cut into the wire strands. Unscrew (turn counterclockwise) the binding post thumbscrews. Place the connec- tor lug or wire around the binding post shaft. Turn the 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.

NOTE: The Tape Outputs are not affected by the Volume, Balance or Tone controls. They receive a fixed level signal.

Page 6 Page 8
Page 7
Image 7
Rotel RA-03 owner manual Preamp Outputs y
Page 6 Page 8

RA-03 specifications

The Rotel RA-03 is a high-performance integrated amplifier designed for audiophiles who appreciate great sound quality without compromising on convenience and style. As part of Rotel's extensive range of audio equipment, the RA-03 embodies the brand's commitment to delivering exceptional performance and durability.

One of the main features of the RA-03 is its power supply, which provides stable and reliable performance. The amplifier is powered by a robust Toroidal transformer, ensuring efficient power distribution and minimizing electrical interference. This design allows the RA-03 to produce a powerful output of 30 watts per channel at 8 ohms, making it suitable for driving a variety of speakers, from compact bookshelf models to more demanding floor-standing options.

The RA-03 boasts a range of connectivity options, including five line-level inputs, a record output, and a dedicated phono input for vinyl enthusiasts. This versatility allows users to connect multiple sources, such as CD players, streaming devices, and turntables, without needing additional equipment. The phono stage uses high-quality components to ensure accurate and noise-free playback of vinyl records.

In addition to its connectivity, the RA-03 incorporates advanced circuit design and high-quality components, contributing to its dynamic and detailed sound signature. The Class AB amplifier design contributes to a smooth, natural timbre, allowing listeners to experience music as the artist intended. The unit also features a sophisticated tone control system, providing users with the option to adjust bass and treble according to their preference.

Another notable characteristic of the RA-03 is its sleek and minimalist aesthetic, characterized by a brushed aluminum front panel and a simple, intuitive layout. The tactile knobs and buttons enhance user experience, making it easy to navigate controls. The clear LED display provides essential information, ensuring that users can monitor their settings at a glance.

The Rotel RA-03 stands out as a well-built, reliable integrated amplifier that delivers impressive sound quality. With its versatile connections, advanced circuitry, and elegant design, it represents an excellent choice for music lovers looking to enhance their audio experience, whether they're enjoying classic vinyl records or modern digital formats. The RA-03 exemplifies Rotel's dedication to creating exceptional audio products that cater to diverse listening preferences.
Top Page Image Contents