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The extra terminals might be there so you can bi-amp the speakers. (Drive the woofers and tweeters with separate amps). This also allows you to use only the woofers in the units as subs with different high frequency units; as in a home theatre system.
Easy. Your home theatre amp will have a sub or LFE output ( RCA plug ). You simply connect this output to the input ( usually the left side, or use a Y splitter and use left and right inputs, or the LFE input if your sub has it ). Then, you must turn the sub on in your recievers setup menu, and your sub should work.
Sounds like your system is going into a safe mode. This happens when you have a neg/pos reversed hooked up, or your wires are touching. This feature prevents you from blowing up your amp. Check your wires, and make sure the positive is hooked to positive etc. and make sure no bare wires are touching.
Does the Sub have a Low- Level input? This is a RCA type female connector, what you need to do is run a Male RCA cable from your home theatre where it says Sub-OUT and go into the Sub woofer Line in. Unless you only have speaker wire inputs on the back of the Sub then take the Left and Right front into the Sub speaker inputs and then out of the Sub speaker OUTS back to your speakers.
check the cable 1st. If this speaker is powered, you could have a bad shield, or the power is causing a ground loop.
If the speaker is coming from an amp using speaker wire ie: 2 lead + - check the connection and make sure no fraid strands are touching each other on the rear connection.
In addition check your TV, Ap, And speaker system (if sub is powered independently) are all on the same curcuit.
a certain cause for ground looping resulting in hum.
Yes, that type of connector is often used for a VGA signal for a computer monitor. But in this case it is an all-in-one connector Yamaha used in order to simplify the hookup of this home theatre system. Unfortunately, the subwoofer is only usable with the DVR-S300 receiver/DVD player.
This means that you have purchased a three piece home theatre system. Two tweeters and a sub-woofer. Assuming you are using a Stereo player (Tape/CD/DVC)you have to connect the Left Output of the Stereo placer to the Left Input at the back of the Sub-Woofer and the Right output to the Right input of the subwoofer by cables. Then take tweeters and connect them to Right speaker and Left speaker output at the back of the sub-woofer ( note if the speakers are marked L/R, then connect them to the subwoofer output accordingly. In case you are using a 5.1 player, then only connect the front right and front left to the Right and Left input at the back of the subwoofer. You are and you can now start playing your music or movies and and you will get theatre quality sound.