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The evaluation of the measurements also made it clear which properties of loudspeaker cables are most important in practice.
Loudspeaker cables of normal length can demonstrably produce transmission losses through interaction with the loudspeaker impedance. The main causes of transmission losses are unfavorable cable construction, combined with unsteady speaker impedance.
The lower the impedance of the speaker, the greater the influence of the speaker cable. As the line length increases, so do the transmission losses.
From an electrical point of view, the two current-determining (serial) quantities resistance and inductance are clearly in the foreground in speaker cables. Sufficient cross-section with low inductance at the same time are the two main requirements for good speaker cables. In this way, the interactions with the speaker impedance and thus the transmission losses are lowest. The back EMF induced by loudspeakers can change the impulse response noticeably depending on the cable. Load-neutral cables also have a positive effect here.
Optimal contact between connectors or cable lugs is extremely important for speaker cables. Contact problems caused by poor quality or unsuitable connectors are fully included in the transmission losses. From a technical point of view, these “findings” are by no means revolutionary. However, we were surprised by the influence of the back EMF fed back by the loudspeaker. This effect actually provides material for in-depth research - also on the subject of amplifiers.
The evaluation of the measurements also made it clear which properties of loudspeaker cables are most important in practice.
Loudspeaker cables of normal length can demonstrably produce transmission losses through interaction with the loudspeaker impedance. The main causes of transmission losses are unfavorable cable construction, combined with unsteady speaker impedance.
The lower the impedance of the speaker, the greater the influence of the speaker cable. As the line length increases, so do the transmission losses.
From an electrical point of view, the two current-determining (serial) quantities resistance and inductance are clearly in the foreground in speaker cables. Sufficient cross-section with low inductance at the same time are the two main requirements for good speaker cables. In this way, the interactions with the speaker impedance and thus the transmission losses are lowest. The back EMF induced by loudspeakers can change the impulse response noticeably depending on the cable. Load-neutral cables also have a positive effect here.
Optimal contact between connectors or cable lugs is extremely important for speaker cables. Contact problems caused by poor quality or unsuitable connectors are fully included in the transmission losses. From a technical point of view, these “findings” are by no means revolutionary. However, we were surprised by the influence of the back EMF fed back by the loudspeaker. This effect actually provides material for in-depth research - also on the subject of amplifiers.