Electro-Dan SS20202014 Surround Sound Amplifier User Manual
Introduction The Electro-Dan SS20202014 (SS Triple-20, 14) is a complete Surround Sound Preamplifier, decoder and Power Amplifier all in one box. A stereo input, mains input and a further 4 or 5 speakers is all that is needed to complete a home cinema system. Features: • • • • • • • • • • • 20W per channel RMS* power to front left and right channels. 20W RMS* power to rear channel. 14W RMS* power to centre channel. Pre-amp with loudness filter and tone controls.
Operating the system The SS20202014 has mains input and output sockets. These are in the form of European style 3-pin connectors.
Safety Precautions The SS20202014 is like many other electrical units and safety must be assessed for safe and reliable use.
• DO NOT POKE THE UNIT WITH SHARP OR THIN OBJECTS! Hooking Up the SS20202014 The unit is designed to decode a stereo signal, usually from a TV, VCR or similar appliance. It will also accept signals from Hi-fi equipment (i.e. CD players) or even personal stereos. A Mono input can only be used once it is split into two channels by a splitter. Note that rear surround sound does not work with mono inputs.
to improve the decoding of the surround sound. On some DVD players there are line outputs for surround sound (usually Dolby® Digital 5.1 Surround Sound). Using the correct lead, these outputs can be plugged into the preinputs of the SS20202014. For the rear channel, a lead with two phono sockets to a 3.5mm stereo jack socket is required, shown left: For the centre channel, a similar lead is required but it only has to be mono and therefore may have one phono socket and a mono 3.5mm Jack Plug.
are placed behind the listening position. The diagram below shows the layout. To ensure the long term reliability of your surround amplifier, certain criteria needs to be looked at for loudspeaker selection. The table below looks at the impedance of the loudspeakers on each channel.
which should be 20W minimum. The centre speaker should be rated at 15W minimum. For best results, use speakers that are matched for best sensitivity. Cable used should be capable of passing the required power. Thicker, higher quality cable will give better results. Warning: The centre speaker and the front speakers must be magnetically shielded if they are placed near a Television. If this is not observed, the cathode ray tube inside the TV will suffer.
When listening, the centre speaker should be adjusted to the point where you can ‘just’ hear it. This is the optimum setting for many movies and music. Too loud and you will not get the stereo front image and also overload the centre amplifier or speaker much easier when the volume is turned up. Turning off the rear and centre amplifiers When listening to music (for instance), you may not want the rear or centre channels (or both).
Troubleshooting • The unit has no sound and the LED indicator is not lit. Did you press the power switch? Check the power, is it connected? If so, check the fuses in the mains plug and the unit and replace any that have blown. • The unit has no sound, but the LED indicator is clearly lit. Check the volume, is the main volume sufficient? Check the individual channel levels, are they sufficiently turned up? Is the headphone switch pressed in and the rear and centre power switches switched up.
