+- Foros de Supervaca.com (http://foro.supervaca.com)
+-- Foro: Discusión General de Home Theater (http://foro.supervaca.com/forumdisplay.php?fid=4)
+--- Foro: Equipo de Home Theater (http://foro.supervaca.com/forumdisplay.php?fid=10)
+--- Tema: Perdida de potencia en cable/distancia y mas datos técnicos: (/showthread.php?tid=1406)
Perdida de potencia en cable/distancia y mas datos técnicos: - Eduardo-AAVM - 11-07-2003
<html>
<body bgcolor="white">
<table border="0" cellspacing="1" width="100%" align="center" valign="top"><tr><td valign="top" colspan="10" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>Guía de selección de cable</b></font></td></tr><tr>
<td rowspan="2" width="14%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>Potencia(%)</b></font></p>
<p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>Pérdida (dB)</b></font></td>
<td colspan="3" width="25%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>4 Ohm</b></font></td>
<td valign="top" colspan="3" width="27%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>8 Ohm</b></font></td><td colspan="3" width="33%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>Línea 70V</b></font></td></tr><tr><td valign="top" width="8%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>11%</b></font></p>
<p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>.05</b></font></td><td valign="top" width="8%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>21%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>1.0</b></font></td><td valign="top" width="9%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>50%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>3.0</b></font></td><td valign="top" width="8%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>11%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>0.5</b></font></td><td valign="top" width="9%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>21%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>1.0</b></font></td><td valign="top" width="10%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>50%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>3.0</b></font></td><td valign="top" width="10%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>11%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>.05</b></font></td><td valign="top" width="11%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>21%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>1.0</b></font></td><td valign="top" width="12%" bgcolor="#00099"><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>50%</b></font></p><p align="center"><font color="#FFFFFF" face="Arial,Helvetica"><b>3.0</b></font></td></tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">12 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">140 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">305 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">1150 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">285 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">610 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">2285 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">6920 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">14890 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">56000 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">14 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">90 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">195 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">740 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">185 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">395 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">1480 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">4490 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">9650 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">36300 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">16 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">60 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">125 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">470 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">115 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">250 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">935 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">2840 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">6100 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">22950 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">18 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">40 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">90 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">340 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">85 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">190 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">685 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">2070 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">4450 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">16720 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">20 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">25 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">50 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">195 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">50 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">105 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">390 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">1170 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">2520 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">9500 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">22 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">15 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">35 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">135 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">35 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">70 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">275 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">820 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">1770 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">6650 </font></td>
</tr>
<tr>
<td valign="top" width="14%"><p align="center"><font face="Arial,Helvetica">24 AWG</font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">10 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">25 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">85 </font></td>
<td valign="top" width="8%"><p align="right"><font face="Arial,Helvetica">20 </font></td>
<td valign="top" width="9%"><p align="right"><font face="Arial,Helvetica">45 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">170 </font></td>
<td valign="top" width="10%"><p align="right"><font face="Arial,Helvetica">520 </font></td>
<td valign="top" width="11%"><p align="right"><font face="Arial,Helvetica">1120 </font></td>
<td valign="top" width="12%"><p align="right"><font face="Arial,Helvetica">4210 </font></td>
</tr>
</table>
<p><font face="Arial,Helvetica" size="3">las distancias se indican en pies. 1 m = 3.2809 pies. 1 pie = 0.3048 m</font></p>
</body>
</html>
O sea por ejemplo un cable calibre 14 con un sistema de 8 Ohms (bocina y ampli) perderá:
en 185 pies / 56m: 0.5db (11% de potencia)
en 395 pies / 120m: 1dB (21% de potencia)
en 1480 pies / 450m: 3dB (50% de potencia)
Recuerden que elevar tres decibles una señal requiere incrementos del doble en watts y esto es una variación apenas perceptible. Para oir el doble d evolumen se requiere 10 veces la potencia.
Saludos ojalá les sea util
- Edmundo - 11-07-2003
Eduardo:
No se si sea mi PC, pero solo veo una imagen hasta el final.
- Eduardo-AAVM - 11-08-2003
No es tu imaginación hasta le fondo del mensaje aparece en si la tabla de valores, no sé por que hace eso... Chequé el HTML pero en este y otro foro pasa lo mismo, no asi en el editor HTML.
Saludos.