Car stereo amp draw when off the car once in sleep mode has a 0. This parasitic draw happens when components like the radio keep draining power when the car is off. Learn about the endurance of car batteries for stereo systems and optimize their usage. Now, let's see how many amps is a car stereo and what factors cause the amperage to change. Sep 5, 2021 · Typical car stereos (depending on the design, features, etc) draw about 2 to 5 amps or so at full power. I'd like to use one not-in-a-car and don't know how strong power supply Dec 13, 2022 · Today's car stereos do more than just play music - they are part of a sophisticated infotainment system that connects to your phone, provides directions, and does many other things. The car has a 45Ah battery, so with the stereo the fully-charged battery would drain in around 10 days, which doesn't seem right. This comprehensive guide provides an in-depth look at the importance of electrical specifications and how they affect your car audio experience. Why does a stereo sap energy when it’s supposedly off? Let’s dive into the reasons behind this problem, explore practical solutions, and share tips to prevent it from happening Sep 5, 2024 · To fix a car stereo draining the battery, ensure the wiring is connected to a switched fuse. But how many amps does a car stereo draw? A decent stereo setup will include subwoofers and a speakers that’ll draw about 5-10 amps. Apr 1, 2008 · . Mar 23, 2013 · What makes you think your amp is drawing any power when off, have you verified that with an ammeter? If the voltage to the remote turn on is off, the amp shouldn't draw any current, not even a little. Mar 29, 2023 · The next question is what, if anything, do you do with the peak and median amp draw #s, once you get them. Leaving any interior car appliance ON is the vital reason for battery draw. 1 amps (100 mA), to maintain its settings. " Let's dive deep into the dark currents of dormant car audio and separate myth from reality. Usually this is indicitive of a bad amp and needs to be replaced. 75 amps, so there's a . I checked the voltage at the at the battery terminals and remote terminals of both amps, and both amps were getting the same voltages. Apr 15, 2024 · A car battery is one of the basic issues behind most of these dilemmas. This can be caused by a faulty internal component or a problem with the amplifier’s control circuit. If a battery drain occurs when the car is turned off, it's called a parasitic draw A dead car battery is frustrating, especially when you discover your car stereo is the culprit—draining power even when turned off. 1amp to 0. Fifty milliamps would be a safe upper limit for this, though many vehicles will draw less. But how many amps does a car amplifier draw? Keep reading to find out. So your 1500watt class D amp will draw around 150amps. Check all connections, make sure the stereo’s power-off feature works, and consider a battery-saver device. however, once my H700 processor is hooked up, the draw increases to 0. Aug 27, 2009 · So your amplifier, with your charging system sitting at 13. Check to make sure the remote wire isnt telling the amp to come on while the truck is off. I just wonder if this is normal or is there something wrong with It’s time to upgrade your car stereo. May 19, 2010 · how many amps does a car cd player draw when it’s off? Nov 27, 2024 · Car stereo amplifiers can draw power even when the car is turned off, which can eventually drain the car battery. You do know those ones? I can't explain more. That's why they consume a significant amount of power from your electrical system and can also create a drain on your battery. Aug 21, 2007 · Hi I'm wondering how much a car radio/stereo player/amplifier will take electricity (I mean those which you have in your car). So, the amperage for a regular car stereo is between 0. Another reason may be a defective or bad amp. Already you can see what could go wrong if you used a 150amp fuse, for just this amp alone is drawing around 150amps, which could open our fuse. 5 mA and the a/d/s draws 45 mA. ” This term refers to electrical equipment consuming electricity from your vehicle when it shouldn’t be (e. This is because the car battery pulls out greater amps and it ruins the battery life in no time. Oct 20, 2007 · Hi, recently i came across my car battery dying whenever the car was parked for more than 2 days. 5 amperes or 500 milliamperes. Apr 10, 2025 · Some stereos draw more than regular ones but don't exceed 0. Jul 22, 2024 · Car still turned on, but couldn't turn over ignition. May 21, 2025 · If your car stereo draws excessive power, your car battery can drain overnight! So, follow my writeup to learn how to fix car stereo draining battery easily. When the car is off the 300/2 draws 1. Feb 1, 2011 · On average, how much current does, let's say, a 1200W amp draw that is fused at 120A? With gain set appropriately to 1200W, at full tilt, perfect voltage, etc. In most cases, the power requirement is low, but it’s still crucial that you know it to match the battery’s capacity. Jul 9, 2024 · 125amps (from the total RMS/12 of the class D amp) + 25amps (the class D efficiency) which gives you 150amps. Feb 16, 2025 · A car amplifier constantly drawing power, even when the engine is off, can quickly deplete your battery, leaving you stranded and frustrated. Jan 22, 2024 · Discover how long a car battery can power a car stereo without the engine running. 74 amperes (amps). Now for the 300watt A/B amp. 5A at very low volume and 1 to 2A at reasonably high volume. This issue, known as parasitic battery drain, can leave you stranded and puzzled. 55 amp Sep 24, 2023 · Turn up the volume on your car audio knowledge! Discover how many amps your car stereo needs for optimal performance. Ever sat in your car and noticed your battery draining fast? If you have a car amplifier installed, it might be the culprit, drawing more power than May 16, 2025 · An amplifier that’s not switching off properly can continue to draw power even when the stereo is off. Sep 9, 2025 · While many culprits exist, from a faulty door switch to a parasitic draw in the ECU, the car radio often takes the blame. Jun 20, 2008 · - If I leave the amp connected, turn on car, listen to radio, turn car off, open door, close door (radio stays on unless you open door), I see a 400mA draw no matter how long I wait. Before you start shopping, however, there’s one thing you need to know – how many amps does a car radio use? Understanding car stereo voltage and amps is essential to make sure that the battery can handle the power requirements. That is why you need to protect them against any possibility of fire by checking the car amp fuse size chart and equipping your amp with the right fuse. High-powered audio systems with amplifiers and subwoofers can draw significantly more current, potentially up to 60 amps or more at peak levels. This wire is in charge of telling the amp when to switch on and off. They’re also a great way to get louder and more powerful bass than you could otherwise achieve. Don't starve your amp! Find the perfect 12v power wire for your car audio setup with the car audio power wire calculator. Jun 30, 2023 · Car Radios and Parasitic Draws Getting to the point of the article, if your car radio doesn’t have a mechanical on/off switch like you might have found in a twin-shaft radio from the ’70s or early ’80s, it will draw a small amount of current from the battery when you turn it off. But how many amps *should* your radio draw when it's off? The answer, predictably, is "it depends. Most automotive consumers that are considering a car audio upgrade are just looking for a few new features with their car stereo or a little cleaner, crisper sound out of their door speakers. Do this by checking the voltage at the amp on the remote wire with the truck off. g. Power amps consist of a JL Audio 300/2 and an old a/d/s 4 channel amp. Jul 28, 2025 · When turned off, a car stereo should draw a minimal current, usually around 0. Altogether, they draw a very small amount of current. 4 amps when the car is off and completely shut down?! I can understand the high current draw when the car is first checked as you have to disconnect the battery and install the monitor in between the battery connection, but after 20 mins or so, depending on make/model, normally anything over 50 mA is too much with an aftermarket system. . However, not all stereos are made equal. How many amps does a car stereo? A typical stereo Feb 19, 2010 · Re: OT- General amp draw of a car stereo? The Kenwood Head Unit, with built-in 4 channel amp, that I used for my son's boombox, consumed ~0. Would it do so at times. I know fuses can take more current than they are rated for for short bursts, but I was also told that amps don't constantly pull their Car amplifiers are a great way to boost the sound of your car’s stereo system. It's a cheap one an the amplifier is normal 4x45W. I believe my remote acc. Oct 26, 2016 · I had 2 amps in a car, and if I turned it up a little bit w/ the car turned off, the mid amp would cut out while the sub amp would continue to play. Sep 4, 2021 · How much current does a car stereo draw when off? Most vehicles draw some battery current when the key is off, thanks to the clock and the internal memory of engine computers, body-control modules, and radio presets. I tested the car's current draw with the iginition off, and found that without the stereo it draws 50mA but with the stereo it draws 180mA. Nov 29, 2021 · I wanted to buy a focal fpx 1000. I believe 50 ma is the minimum draw you should see when the car is off Apr 12, 2024 · Introduction Understanding the basics of car stereo voltage and amps is essential for anyone looking to optimize their audio system's performance. Looking back, this isn't quite the answer you want? Sep 12, 2021 · Car stereos, including amplifiers, are built-in with vehicles, however, car owners who want better and advanced stereo systems opt for aftermath options which may draw more power. Get ready to fine-tune your driving experience! Jul 18, 2024 · An amplifier can drain your battery if the engine is off, the alternator can’t keep up with power demands, there’s a bad ground connection or loose wires, or if it’s directly wired to the battery without a remote connection to the stereo. Sep 18, 2023 · Find out How Many Amps Does a Car Stereo Draw When off. Understanding the reasons behind this drain and knowing how to fix it is crucial for every car enthusiast who wants to keep their audio system running smoothly and their battery healthy. I noticed the amp/LC2i lights were on while car was off. 2 amp draw. Sep 26, 2015 · How many amps will a car stereo draw to just power on? By londonena September 26, 2015 in General Hi-Fi & Beginners Discussion Feb 1, 2024 · Can a Car Radio Drain the Battery? Yes. This is because some amplifiers have a standby mode that allows them to turn on quickly when the car is started. so i got testing and measured the parasitic draw. Jun 27, 2014 · Since the installation of my car audio system I've had two batteries fail prematurely. 5amp when off. Learn about its power consumption and its impact on your vehicle's battery. , when the car is turned off or the equipment is not being used). Jul 10, 2022 · Car stereos are more or less built-in with your vehicle when they are delivered from the factory. If the amp/LC2i is drawing power with car off, the lights will be on, correct? These lights should be off. Amps can draw power even when turned off. One explanation is that the remote wire was not properly connected. Dec 31, 2024 · Want to power your car amplifier at home? Use this AC-DC power supply amp calculator to find the right amperage for your setup easily! Feb 15, 2023 · There are a few possible explanations for why your car amp continues to stay on or draw power when the car is turned off. wire was installed improperly and the amp was remaining on over night with car off. IMO, you need to look elsewhere in the car for your current draw. Oct 4, 2017 · I tried a standard parasitic draw procedure with a DMM but could not get a stable reading, the draw was definitely in milliamps and not amps as amps returned a 0 or near reading. When a car stereo, radio, receiver, or head unit drains, your battery is due to a process called “parasitic draw. As someone mentioned, they are kind of meaningless (in terms of assessing power supply competency) without knowing the amp load from the rest of the car's systems. A multimeter might be a great idea to diagnose how many amps a car battery draws. 1 to run at 4ohms so it puts out 400 watts, but I’m concerned about it’s average current draw being more than 20 amps. 8 volts, puts out 300w, and your current draw of your amplifier is 21. gjxw5cyr 4n 167g b8kk izik1 z8gx jj3mfm s2rwc xbrv5 pc