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<blockquote data-quote="SPL Blazer" data-source="post: 5718806" data-attributes="member: 587873"><p>I looked into those meters when I built my first real system in my Blazer, but the cost was way too much for what it does. They are cool, but seeing my voltage means more to me than how much amperage I&#039;m drawing. Amperage draw shouldn&#039;t be all that hard to figure out. Go total up your fuse ratings on such things as wipers, heater and A/C, radio, headlights etc. Then total the amp ratings for all the fuses on your amps and you can get a general idea of your current amperage draw. Of course you have to keep in mind that if your sub amp is a 1500 watt amp and has a 150 amp fuse that your only going to come close to that amperage draw when your voltage is at 14.4 volts and the system is being played at full tilt, which isn&#039;t a normal volume for most of us to be playing at while just driving around. Seeing your amperage draw is a bonus for competitors, but we just use a clamp meter for that. Most guys just want to know their voltage isn&#039;t dropping too low, not that you&#039;d be able to hear the difference between 14.4 volts and 13.9 volts at your amps.</p></blockquote><p></p>

[QUOTE="SPL Blazer, post: 5718806, member: 587873"] I looked into those meters when I built my first real system in my Blazer, but the cost was way too much for what it does. They are cool, but seeing my voltage means more to me than how much amperage I'm drawing. Amperage draw shouldn't be all that hard to figure out. Go total up your fuse ratings on such things as wipers, heater and A/C, radio, headlights etc. Then total the amp ratings for all the fuses on your amps and you can get a general idea of your current amperage draw. Of course you have to keep in mind that if your sub amp is a 1500 watt amp and has a 150 amp fuse that your only going to come close to that amperage draw when your voltage is at 14.4 volts and the system is being played at full tilt, which isn't a normal volume for most of us to be playing at while just driving around. Seeing your amperage draw is a bonus for competitors, but we just use a clamp meter for that. Most guys just want to know their voltage isn't dropping too low, not that you'd be able to hear the difference between 14.4 volts and 13.9 volts at your amps. [/QUOTE]

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