The advantages of banana plugs
Banana plugs prevent unsafe connections, frayed cable ends, and the compromised sound these can cause. Teufel’s banana plugs enable a secure connection between loudspeakers and amplifiers or A/V receivers. Robust screw terminals can accommodate any cable with a diameter up to 4 mm². Flexible spring contacts and 24 karat gold plating guarantee a plug connection with very low levels of resistance and perfect sound.
The loudspeakers, amplifiers or A/V receivers you intend to connect need to be equipped with corresponding banana sockets.
Connect more loudspeakers
Each banana plug is equipped with an additional socket on the back so that multiple loudspeakers can be connected to a single amplifier output. It’s a good idea to first read the operational manual for your amplifier to ensure that it’s adapted for this use.
The banana plugs are delivered as sets of two in separate packaging. The listed price is for a pair. The jacks are marked either red or black.
- Banana Plug - C8502P (pair)
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2. Now twist the bare cable so that you can easily guide it through the opening at the bottom end of the banana plug. The exposed wires should now protrude about 2 mm from the bottom part of the banana plug. If the cable is too thick (for example, if you use a cable with a 4 mm² cross-section), you will have to "thin it out" by clipping a few individual copper wires.
3. Bend the protruding copper wires down to all sides so that they have direct contact to the bottom end of the banana plug. If the copper wires are too long and project beyond the thread, then clip them accordingly.
4. Finally, you can now screw the top part of the banana plug back together with the bottom part and thus have a convenient connection possibility for your speaker cable.
For the cable however, the length of the cable is more interesting than the applied frequency. The longer the cable, the greater the resistance of the cable. For 2.5 mm² you have a resistance below 0.4 ohm up to a length of 15 metres. The resistance will become greater as of this length.
As soon as you choose a larger cable cross-section (e.g. 4 mm²) as of this length, you will keep the resistance below 0.4 ohm.
This yields the following equation:
Resistance of cable = 2 x the specific resistance (approx. 0.02 ohm mm^2 m^-1) x the cable length in m / the cable cross-section in mm^2
As the individual strands in our cable are not insulated amongst each other, the full cross-section of the cable is available between the ends.
A "bottleneck effect" only occurs at the ends of the cable.
The transition between the cable and any connector (push terminal, soldered connection or pole clamp) is always accompanied by a greater resistance: the transfer resistance.
Compared with the resistance of the entire cable, this transfer resistance, if conducted well, can be disregarded.
We will consider a cable length of 15 m.
According to the above given equation, the following values are yielded for the cable resistance.
4 mm^2 – speaker cable with tapered cable ends (2 cm)
2.5 mm^2 – speaker cable without tapered cable ends
This yields considerably less resistance if the cable strands are tapered for connection rather than if generally using a thinner cable.
If you would like to calculate your cable resistance yourself, then please use the following equation:
0.02 x 2 x cable length / cable cross-section