Is there any solution if I want to run 2 cables? For example if placement of speakers is too far apart where it is not practical to run the cable to one side then to the other on same "chain"?
@Suhaila Saba - YES! A 100V line can cause shock if someone is in contact with live terminals and/or wires when the system is operating. 100/70/25V systems are classified as Low Voltage and do not pose the same shock hazards as the electrical system in your house or business (a good comparison is the 48V ring signal that was used on telephone hard lines). However, they do still pose a risk of electrical shock if handled improperly and they can cause electrical shorts and even fires if not wired and installed correctly. All safety and wiring guidelines must be followed when installing. That being said, the risk is much lower and if you follow common sense guidelines you likely will never experience any of those issues. If you would like a more in-depth look at low-voltage systems and how the standards where settled on, check out this great article from Rane Commercial: www.ranecommercial.com/legacy/pdf/ranenotes/Constant_Voltage_Audio_Distribution_Systems.pdf
That is the real difference between the 70 and 100 v systems. The Electrical code defines 100 v rms as hazardous and therefore a conduit installation is required, but the 70 volt system is 70 v rms with only occasional 100 v peaks and therefore conduit is not required. If you touch the 70 volt system wires when it is running a strong signal you will definitely feel it!
You will only use two wires. Select the color that matches the wattage you want and the black (common) wires. Example: Orange and Black will give you 6W, Brown and Black will give you 3W, etc... For wattage ratings, see specification sheet - jblpro.com/en-US/product_documents/jbl_8124_8128_v1-pdf-78311bd0-7da8-4b36-bd44-fd2935cf3889
You mention that having speaker wires with twisted pairs are important in 70v applications, but never explain why that is. Can we have an explanation please?
@Mitsubishi Starion Good question! Twisted cable lowers the induced magnetic field around the cables and lowers the voltage induced in those same cables. In short, it reduces 'crosstalk' interference between the individual (and un-shielded) cables in multi-conductor cables, be that a dual conductor speaker cable or mulit-conductor CAT cable or some other variant.
Great informative video!!
One question though, why is twisted pair wire needed on the speaker feed lines?
@AbunzasDotCom This was our very first attempt at making video content and we used Apple's iMovie at the time.
Is there any solution if I want to run 2 cables? For example if placement of speakers is too far apart where it is not practical to run the cable to one side then to the other on same "chain"?
Question:
Wouldn't the 100 v line cause electric shock if someone touches the wires at the connecting points ?
@Suhaila Saba - YES! A 100V line can cause shock if someone is in contact with live terminals and/or wires when the system is operating. 100/70/25V systems are classified as Low Voltage and do not pose the same shock hazards as the electrical system in your house or business (a good comparison is the 48V ring signal that was used on telephone hard lines). However, they do still pose a risk of electrical shock if handled improperly and they can cause electrical shorts and even fires if not wired and installed correctly. All safety and wiring guidelines must be followed when installing. That being said, the risk is much lower and if you follow common sense guidelines you likely will never experience any of those issues.
If you would like a more in-depth look at low-voltage systems and how the standards where settled on, check out this great article from Rane Commercial: www.ranecommercial.com/legacy/pdf/ranenotes/Constant_Voltage_Audio_Distribution_Systems.pdf
@@ProAudioSuperstore Thank you for your great explanation.
That is the real difference between the 70 and 100 v systems. The Electrical code defines 100 v rms as hazardous and therefore a conduit installation is required, but the 70 volt system is 70 v rms with only occasional 100 v peaks and therefore conduit is not required. If you touch the 70 volt system wires when it is running a strong signal you will definitely feel it!
@@jimlearned588
Thank you for your answer.
Como conecto bocina jbl 8128. Tiene 5 cables y no se cuales tomar para conectarla a mi amplificador. Mil gracias.
You will only use two wires. Select the color that matches the wattage you want and the black (common) wires.
Example: Orange and Black will give you 6W, Brown and Black will give you 3W, etc...
For wattage ratings, see specification sheet - jblpro.com/en-US/product_documents/jbl_8124_8128_v1-pdf-78311bd0-7da8-4b36-bd44-fd2935cf3889
Ceiling speaker how to convert LED TV Directly Connected with usb and audio Jack
You mention that having speaker wires with twisted pairs are important in 70v applications, but never explain why that is. Can we have an explanation please?
@Mitsubishi Starion
Good question! Twisted cable lowers the induced magnetic field around the cables and lowers the voltage induced in those same cables. In short, it reduces 'crosstalk' interference between the individual (and un-shielded) cables in multi-conductor cables, be that a dual conductor speaker cable or mulit-conductor CAT cable or some other variant.
Lowell 810 speaker wiring
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