In my previous post, I explained how to position your speakers for surround sound. Next I would like to show you how to wire them up. This is something you do even before you plug your AV Receiver in.
It is really simple to do if you get the basic principles below.
Red and Black – Positive and Negative
All speakers will have two terminals: one for the positive and one for the negative side of the signal. They are usually coloured red for positive and black for negative.
- You will need to connect the red or positive terminal posts on your speakers to the red / positive terminal post on the AV receiver using your speaker cables.
- You will need to do the same with the black speaker terminals.
To aid in the above, most speaker cables will have one side of the wire labelled with a + sign, while the other one with a – sign. Sometimes, only one or the other is labelled but in all instances it should make it easy to connect them up to the correct post.
Choosing the right speaker terminals
Your AV Receiver will have the red and black speaker terminal pairs labelled with the speaker positions: Front Left, Front Right, Centre, Surround Left, Surround Right, Surround Back Left and Surround Back Right. To understand what these positions mean, refer to my previous post.
You will simply need to connect the red and black terminals up to the matching speaker. What you absolutely need to ensure is that the wires don’t touch – at either your speakers or at the AV Receiver. Touching wires will cause a short circuit and could damage your AV Receiver and your speakers.
To attach the cables, unscrew the jumpers and insert the peeled wires from the side of the jumpers ensuring none of the unpeeled wire is hanging out on either side. Screw the jumper back on while holding the speaker cable in place. Ensure it is screwed back on tight so the cable cannot become loose.
Connecting your subwoofer
A subwoofer 99% of the time will have its own amplification, therefore it is not connected using a speaker cable and speaker terminals. It is connected to a pre-amplified signal output by your AV Receiver called a pre-out jack. You will find the subwoofer pre-out jack on the back of your amplifier under the area called Pre-Out.
The cable you will need to connect your subwoofer with is called a single mono RCA to RCA cable or subwoofer cable. If your subwoofer has an LFE input, connect it to that input. If your subwoofer only has a line level input, connect it to that. These will usually be labelled accordingly on the back of your subwoofer. If there is only one RCA input, don’t try to figure out what it is, simply connect the cable.
To ensure the subwoofer is functioning correctly, set the crossover / high-pass filter to its maximum setting. This is usually a knob labelled ‘crossover frequency’ on the back of your subwoofer. This is needed because for home cinema, you need to let your AV Receiver handle bass management for this speaker. Lastly, don’t forget to plug the subwoofer in and power it on.
On higher-end AV Receivers, you may notice that all other speakers will have a corresponding pre-out jack. In an advanced post, I will show you how to use these for adding another amplifier as either an upgrade or for bi-wiring.
Some speakers have two sets of terminals connected by something called the jumper.
The double terminals can be used to bi-wire the speaker. Bi-wiring means connecting the same amplified signal to both the midrange and high-frequency drivers (or sets of drivers) to achieve double the power and get a cleaner sound.
Be-wiring requires an AV Receiver that has this feature or an additional external amplifier. Additionally, it requires advanced set-up of said equipment. I will show you in an advanced post how to do this. For now, just leave the jumpers on the speaker terminals and connect the speaker cable to the lower set of red and black terminals.