Reply to thread

Message

<blockquote data-quote="americannight" data-source="post: 8066275" data-attributes="member: 624648">Hey guys, I thought I&#039;d post this here under electrical help.&nbsp; For background on my build you can check out my build log here:<a href="http:////forums/car-audio-build-logs-cars-trucks-suvs/559208-volvo-s60-build-resurrected-old-school-8.html" target="_blank">http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/559208-volvo-s60-build-resurrected-old-school-8.html</a>You&#039;ll see that I&#039;m running one of the Zed Audio THE DEUCE amps to the IDQv12 speakers bridged mono into the 4 ohm load.Originally I had a 60 amp fuse on that amp.&nbsp; Every few days I&#039;d pop a fuse.&nbsp; The amp is rated at 800 watts mono into 4 ohms.&nbsp; It&#039;s a class A/B amp so I&#039;m guessing it&#039;s roughly 60% efficient.&nbsp; It&#039;s also under-rated.&nbsp; It will do the 800 watts and then some (Zed tells me it has benched at 1000 watts mono take that for what it&#039;s worth).Fuses don&#039;t blow right away, they typically will do short bursts above their rated value for a while and then they will pop.&nbsp; So I&#039;m not surprised this was happening.&nbsp; 60A is pretty light for a class A/B amp of this size and design.So yesterday I replaced the 60A fuse with an 80A Stinger breaker.&nbsp; Now it pops more frequently than the fuse did.&nbsp; I was a bit surprised to see this but then again not really given that a breaker will pop quicker than a fuse.&nbsp; Also whereas fuses will do more than their rated current for short bursts, many breakers will actually pop a tick BELOW their rated current.If I look at what&#039;s going on here using Ohms Law, it seems pretty clear that if this amp really does do the 1000 watts peak, then an 80A breaker will not be enough.Watts = Amps x VoltsSo Amps = Watts/VoltsFactoring in 60% efficiency, I get Amps = Watts/Volts (.60)Assuming 14.4V I get Amps = 1000/14.4(.6) = 115.74 AmpsBased on this, my thought is to go to a 100 Amp stinger breaker and also back off the gain just a tad.Curious if you guys have any recommendations or suggestions here.</blockquote>

[QUOTE="americannight, post: 8066275, member: 624648"] Hey guys, I thought I'd post this here under electrical help. For background on my build you can check out my build log here: [URL="http:////forums/car-audio-build-logs-cars-trucks-suvs/559208-volvo-s60-build-resurrected-old-school-8.html"]http://www.caraudio.com/forums/car-audio-build-logs-cars-trucks-suvs/559208-volvo-s60-build-resurrected-old-school-8.html[/URL] You'll see that I'm running one of the Zed Audio THE DEUCE amps to the IDQv12 speakers bridged mono into the 4 ohm load. Originally I had a 60 amp fuse on that amp. Every few days I'd pop a fuse. The amp is rated at 800 watts mono into 4 ohms. It's a class A/B amp so I'm guessing it's roughly 60% efficient. It's also under-rated. It will do the 800 watts and then some (Zed tells me it has benched at 1000 watts mono take that for what it's worth). Fuses don't blow right away, they typically will do short bursts above their rated value for a while and then they will pop. So I'm not surprised this was happening. 60A is pretty light for a class A/B amp of this size and design. So yesterday I replaced the 60A fuse with an 80A Stinger breaker. Now it pops more frequently than the fuse did. I was a bit surprised to see this but then again not really given that a breaker will pop quicker than a fuse. Also whereas fuses will do more than their rated current for short bursts, many breakers will actually pop a tick BELOW their rated current. If I look at what's going on here using Ohms Law, it seems pretty clear that if this amp really does do the 1000 watts peak, then an 80A breaker will not be enough. Watts = Amps x Volts So Amps = Watts/Volts Factoring in 60% efficiency, I get Amps = Watts/Volts (.60) Assuming 14.4V I get Amps = 1000/14.4(.6) = 115.74 Amps Based on this, my thought is to go to a 100 Amp stinger breaker and also back off the gain just a tad. Curious if you guys have any recommendations or suggestions here. [/QUOTE]

Verification