Connect speakers via cable

January 2023

If you are looking for good new speakers like our GRAND ORCHESTRAORCHESTRA (Gen.2) or ORCHESTRA SLIM for their hi-fi system must inevitably ask themselves the following questions: What is the best way to connect my speakers to my receiver? Which cable do I need to connect my speakers? How long and how thick should the speaker cable be? Because the question of cabling is not unimportant. In fact, it makes a lot of sense to budget for sensible cables before you buy. The cables don't necessarily have to be expensive, but good cables ensure audibly better sound for small and large systems.

In a HiFi system, the receiver controls each speaker with its own electrical signal. If this is done by cable, then two copper wires (strands) each transmit the signal. The stranded wires are not solid wires, but consist of many individual thin copper wires that are coated with plastic, usually silicone, except for the ends. The signal flows on the surface of the stranded wires.

What is the optimal length for speaker cables?

Basically, the shorter the cable path, i.e. the length of the cable, the better. Because every "meter" of cable inevitably leads to a loss of signal. But don't worry, you don't have to place your speakers directly next to the receiver because of this. With high-quality cables, nothing can be heard of the distance. In addition, the speakers must have a certain distance from each other to allow spatial listening. A common recommendation is to use speaker cables with a diameter of at least 2.5 mm² cross-section for cable lengths of five meters or more. By the way: The cables should be the same length, because different lengths produce different resistances.

Connect speaker cable correctly

At least as important as the wiring is the correct connection of the cables to the speakers. During installation, make sure that the cable is well screwed to the loudspeaker and amplifier. The cable will "settle" in the terminals over time. It will wear out somewhat. Therefore, it is best to retighten after one to two months.

In addition, the plus terminal (red) on the amplifier must also be connected to the plus terminal on the loudspeaker and minus (black) to minus. If plus and minus are reversed, the speakers will play in the opposite phase. The bass will become unclean as a result. To avoid this, we like to use the labeled cable side as plus as a little mnemonic, since usually only one side is labeled.

Last but not least, a little safety tip: Only remove or connect cables when the amplifier is switched off. Otherwise, there is a risk of a strong noise impulse that can damage the speakers.


The topic of cables is discussed with much passion in the HiFi world. If you pay attention to the above-mentioned aspects, then you can get a very good sound without much effort and expense. So you should not be deterred by this.

It's best to get advice from a HiFi expert in your area. They can address your individual situation and thus achieve the best possible result. In our dealer search, you can quickly and easily find a sonoro dealer near you.