Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 15 (click to view)
Speaker placement
Ideal speaker placement varies depending on the size of your room and the wall coverings, etc. The typical example of speaker placement and recommendations are as follows :
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ENGLISH
Front left and right speakers and center speaker
Place the front speakers with their front surfaces as flush with TV or monitor screen as possible. Place the center speaker between the front left and right speakers and no further from the listening position than the front speakers. Place each speaker so that sound is aimed at the location of the listener�s ears when at the main listening position.
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Surround left and right speakers
Place the surround speakers approximately 1 meter (40 inches) above the ear level of a seated listener on the direct left and right of them or slightly behind.
Surround back speaker
Place the surround back speaker at the rear center facing the front at a slightly higher position (0 to 10 inches) than the surround speakers. We recommend installing the surround back speaker at a slightly downward facing angle. This effectively prevents the surround back channel signals from reflecting off the TV or screen at the front center, resulting in interference and making the sense of movement from the front to the back less sharp.
1. TV or screen 2. Front left speaker 3. Subwoofer 4. Center speaker 5. Front right speaker
8 6. Surround left speaker 7. Surround right speaker 8. Surround back speaker 9. Listening position
Subwoofer
The subwoofer reproduces powerful deep bass sounds. Place a powered subwoofer anywhere in the front as desired.
Surround speaker
Notes : When using a conventional TV , to avoid interference with the TV picture, use only magnetically shielded front left and right and center speakers. To obtain the best surround effects, the speakers except the subwoofer should be full range speakers.
Front speaker
