User manual PIONEER SP-C21

[. . . ] Be careful to ensure proper polarity of connection. We recommend a minimum of 18 gauge for runs up to 25 feet, and thicker for longer runs. Strip off ½" of insulation from the ends of the cable, twist the bare strands and insert into the binding posts. [. . . ] This will ensure that any bass signals encoded in the center channel are redirected to the front speakers or sub-woofer where they will be optimally reproduced. If you have a choice, set the crossover frequency to 100Hz. It is recommended to use a sound level meter to setup the center channel level from the receiver. Adjust the receiver center volume until the center channel sound level is equal to that from the front left and right loudspeakers. In the absence of a meter, initially set the level of each channel to be identical. All models in the range have sufficiently close sensitivities such that this is a good starting point. Now play a wide selection of movies and listen carefully to the clarity of dialog, particularly in the presence of other effects such as explosions. Adjust the level until the dialog is clearly but naturally presented. For best results the loudspeakers should be positioned at or above ear level. Do not install this speaker system near a stove or other heating appliance, or put it in a place exposed to the sun. Such locations may cause the cabinet to change color and the speaker system to break down. Remember that the SP-FS51-LR, SP-BS21-LR, and SP-C21 are quite heavy, so it is dangerous to install them in high places such as on walls or pillars or in other unstable locations unless suitably secured in place. Pioneer will not be responsible for any accidents or damage that may result from improper installation. However, if the speaker system is installed too close to the screen of a television set, color distortion may occur. If this happens, turn off the power switch of the television set, and turn it on after 15 to 30 minutes. If the problem persists, place the speaker system away from the television set. [. . . ] Guard against this by setting your equipment at a safe level BEFORE your hearing adapts. eSTABLISH A SAFE LEVEL: · Set your volume control at a low setting. Slowly increase the sound until you can hear it comfortably and clearly, without distortion. [. . . ]