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Speaker cable length6/2/2023 ![]() ![]() For example, a ceiling speaker specs might say “Sensitivity: 90dB (1w/1m)”ĭistance from speaker to target audience: This is also optional and is used for calculating the SPL loss in the air from the speaker to the target audience. It is normally found in the specifications of the speakers. Speaker sensitivity: this is optional, but is used to calculate the SPL level at the target audience. Tap settings on speakers: Most speakers for distributed speaker systems have some way of selecting different taps, or power, for the speaker. Total number of speakers connected in the cable run. USA doesn’t use metric, so select “Feet & AWG” – the cable lengths will be in feet, and an extra box appears to enable you to select the cable thickness in AWG. Most countries use metric, meaning the cable lengths are measured in metres, and the cable size is in mm². ![]() All you have to do is fill in the white cells in the calculator.įirst up, select the units of measure: either “Metres & mm²” or “Feet & AWG”. It even calculates the resultant SPL in dB at the target audience. By inputting the cable size and length, and the number and details of the speakers, it will calculate the loss in SPL(dB), Voltage, and Watts. This calculator will help you determine the cable losses in distributed speaker systems (also known as 100-volt or 70-volt speaker systems).
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