exon manual.qxd 01/04/03 12:32 Page 1 Contents Important..................................................................................1 Introduction..............................................................................2 Design Innovation....................................................................3 General Description.................................................................4 Installation................................................................................
exon manual.qxd 01/04/03 12:32 Page 2 Important The Exon 3 is a unique amplifier where ingenious design has allowed an unusually high output from an exceptionally small size. Listen to its superlative sound quality and you will understand why we say “unique”. The Exon 3 can comfortably produce power levels in excess of 200 watts and therefore good ventilation MUST be provided around the case top and bottom. We advise the following. 1. Do not stack the amplifiers on top of each other. 2.
exon manual.qxd 01/04/03 12:32 Page 3 Introduction Your Rega Mono-block has been designed to reproduce music effectively and easily. The Exon 3 has been built to Rega's discriminating standards of reliability and quality to ensure many years of musical enjoyment. A Monoblock's function is to drive loudspeakers in partnership with a pre-amplifier unit. It is vital that the amplifier achieves this without changing the signal, which would distort the music.
exon manual.qxd 01/04/03 12:32 Page 4 Design Innovation In common with all Rega products, the Exon 3 mono-block has been designed without compromise. Our time and money has been spent on developing the unique circuit design and using unusually high quality components. However, we have included useful features to further enhance your listening pleasure.
exon manual.qxd 01/04/03 12:32 Page 5 General Description The Rega Exon 3 Power Amplifier is a 120 Watt 8Ω/200 Watt 4Ω high performance, symmetrical circuit, Mono Block power amplifier, which is housed in the Rega custom built extruded aluminium case and high thermal efficiency heat sink. The Exon 3 amplifier has a fully protected output stage, with DC and electronic thermal protection & supply monitor for both transformers. High quality Evox polypropylene capacitors have been used in the signal path.
exon manual.qxd 01/04/03 12:32 Page 6 Installation The amplifier will work well on most surfaces, such as a shelf or a table, provided there is sufficient air around it to prevent overheating. To avoid magnetic interference, site the amplifier as far away from the pre-amp as the lead will allow. If possible, place it to the left of the preamp. Keep other equipment, such as tuners, cassette decks or CD players away from the amplifier. Never stack other hi-fi components on top of the amplifier.
exon manual.qxd 01/04/03 12:32 Page 7 Amplifier and Speaker Protection The power LED will flash if the following has occurred. 1) Thermal cutout has been activated. If the amplifier reaches a temperature liable to cause internal electronic damage a thermal protection sensor will activate, and protect the speaker, and alert the user of the fault condition. The unit should be turned off for at least 30 minutes to allow for complete cooling.
exon manual.qxd 01/04/03 12:32 Page 8 Short Circuit Protection If in the event that the speaker leads are shorted, the short circuit protection will protect the output stage from excessive currents. This innovative Rega protection circuit is not placed in the audio signal path and therefore does not affect sound quality.
exon manual.qxd 01/04/03 12:32 Page 9 Power Amplifier Inputs The Exon 3 can be used in conjunction with any pre-amplifier with a standard line output level (approximately 1V). The red (Input) socket on the back of the amplifier is for input from the pre-amplifier. The white (Link) socket on the back of the amplifier is used to connect other power amplifiers in parallel, provided your pre-amplifier can drive more than one.
exon manual.qxd 01/04/03 12:32 Page 10 Input Connections All connections are made using RCA (phono) type connectors. The sockets on all Rega amplifiers are clearly marked red and white. Input: the lower row marked in RED. Link: the upper row marked in WHITE. Important: Always turn off the amplifier when changing leads, especially speaker cables.
exon manual.qxd 01/04/03 12:32 Page 11 Loudspeakers The Rega amplifiers are capable of driving all normal hi-fi loudspeakers. (Most loudspeakers have nominal impedance of 8Ω). If driving loudspeakers of unusually low impedance (4Ω or less) ensure that you check with your dealer for compatibility. Loudspeaker Cable We recommend using good quality cable such as our own, or similar types made by other quality hi-fi companies.
exon manual.qxd 01/04/03 12:32 Page 12 In Use Switching On Depressing the power switch to the left of the control panel turns on the amplifier. The LED in the power button will flash. After several seconds you will hear a gentle click and the power button will stop flashing. This indicates the switch-on relay has been released and the amplifier is ready for use. We recommend you switch your source components (Phono, CD, Tuner, Tape etc.
exon manual.qxd 01/04/03 12:32 Page 13 Specifications Power output @ 230V or 115V supply voltage. 125 Watts into 8Ω.. 225 Watts into 4Ω.. Input sensitivity for 125W and 225W into 8Ω and 4Ω. Power amplifier input sensitivity = 1.1V @ 24KΩ. Power amplifier gain = 28.8dB. Features. Speaker & DC protection. Fuse monitor. Short circuit protection. Reactive load protection. Dual transformer power supply Frequency response. 11Hz to 50kHz (1dB Points). Power consumption.
exon manual.
exon manual.
exon manual.qxd 01/04/03 12:32 Page 16 Troubleshooting (Power on, sound from one speaker only) Are the connections between the speaker and the amplifier secure and functioning correctly? Check that the wires are securely connected and correctly soldered. If not, contact your Rega dealer NO YES Are both channels of the selected source connected and working properly? NO Check the source components for faults. Swap the output leads. Does the fault swap over? YES Swap the interconnect leads.
exon manual.
exon manual.qxd 01/04/03 12:32 Page 18 Owners Log (1) Owner....................................................................................... Date.......................................................................................... Where Purchased..................................................................... .................................................................................................. (2) Owner........................................................................
