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<blockquote data-quote="Kippo" data-source="post: 1299560" data-attributes="member: 10096"><p>how many channels u have in ur amp? 2? 4?</p><p></p><p>just do rough estime i.e P = IV i.e P=power, I=current & V=voltage.</p><p></p><p>say its a 4-channel amp i.e 60w x 4 = 240W</p><p></p><p>so I = P/V = 240 / 12 = 20A.</p><p></p><p>so any 20amps fuse or higher will do. It is not meant to protect the amp but to prevent a short circuit from burning ur car eg. if the power cable suffer insulation damage and touch the car body which is -ve terminal.</p><p></p><p>you only use relay if you are going to use more than 2 amps. It is mainly due to current supply from the HU remote turn ON may not be sufficient to switch ON more than 2 amps.</p><p></p><p>since ur HU has a fuse already, no need to add another fuse. It will be overkill.</p><p></p><p></p><p>dont get too exited with fuses. and read more about it since i think u have a wrong understanding about its ACTUAL purpose.</p><p></p><p>cheers.</p></blockquote><p></p>
[QUOTE="Kippo, post: 1299560, member: 10096"] how many channels u have in ur amp? 2? 4? just do rough estime i.e P = IV i.e P=power, I=current & V=voltage. say its a 4-channel amp i.e 60w x 4 = 240W so I = P/V = 240 / 12 = 20A. so any 20amps fuse or higher will do. It is not meant to protect the amp but to prevent a short circuit from burning ur car eg. if the power cable suffer insulation damage and touch the car body which is -ve terminal. you only use relay if you are going to use more than 2 amps. It is mainly due to current supply from the HU remote turn ON may not be sufficient to switch ON more than 2 amps. since ur HU has a fuse already, no need to add another fuse. It will be overkill. dont get too exited with fuses. and read more about it since i think u have a wrong understanding about its ACTUAL purpose. cheers. [/QUOTE]
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