SnowDrifter Posted October 15, 2011 Report Posted October 15, 2011 I have a DVC power acoustik mofo. Since it's a power acoustik... I don't really trust their specs. How can I measure the resistance of a coil? And a side question: what is typical box rise? Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
Azagtoth502 Posted October 15, 2011 Report Posted October 15, 2011 Measure resistance with a multimeter set to "ohms" Box rise depends on many things. Quote pa-pa-platypus sorry not everybody has a companies nuts so far down their throat they catch every drop ball sweat when it falls
fritosaregood Posted October 15, 2011 Report Posted October 15, 2011 get a 9 volt battery, 2 long pieces of wire, a clamp meter, and a volt meter. connect one wire to the neg of the coil and the neg of the battery, connect the positive to the pos of the coil and pos of the battery, set the clamp meter to dc current, and the volt meter to dc volts. get the current off the clamp meter, we'll call it "I" and the volts from the volt meter, we'll call it "V". now divide V by I and youll get R or your resistance of the coils or a quicker way would be get a dmm and set it to measure ohm and itll pop right up on the screen, and there is no "typical" box rise Quote seller feedback: http://www.stevemeadedesigns.com/board/ind...showtopic=61719 http://www.stevemeadedesigns.com/board/ind...showtopic=68281 build log: http://www.stevemeadedesigns.com/board/index.php?showtopic=44800 Gf's build: http://www.stevemeadedesigns.com/board/topic/54346-kickergirls-camaro-new-box-pg-5/#entry753970
SnowDrifter Posted October 15, 2011 Author Report Posted October 15, 2011 I should add that I don't have a clamp. If I hook up my DMM right to one of the coils, it measures zero and changes if I tap the sub. And let me clarify my box rise question: I want to wire the sub to 2 ohms, but my amp is rated for 4 ohms and I was wondering if I could safely have it wired. If I had a clamp, then it wouldn't have a problem - but I don't. Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
corey0928 Posted October 15, 2011 Report Posted October 15, 2011 if the coil is reading 0 then it most likely isn't good. or you have it set wrong some how. And if your amp is only 4 ohm stable then no I would not run it at 2 ohms. But if it can run at 2 then go for it. Quote
STEvil Posted October 15, 2011 Report Posted October 15, 2011 If its rated at 2 ohms per coil (dual voice coil means there's two of them) then your possible wiring options are 1 ohm, and 4 ohms. Its generally not a good idea to wire below the lowest rated stable ohm load of your amplifier. If your ohm load is 0 but changes when you tap the sub you've either hooked up the DMM incorrectly, have a dead coil, or have a poor connection from the DMM to the sub terminals. Quote MickyMcD - "Capable of making some serious trouser flapping volumes at where's-my-testicles frequencies, the Servo-Drives used to be fairly jaw dropping..." Any time you have have a power wire next to your frame put some rubber hosing (or cut up an innertube) around it. The wire is bound to wiggle (due to driving or flex) and the casing will eventually wear through. Hammerdown... 1% no links to outside websites, business related FB/YT pages allowed.
TeamHT Posted October 15, 2011 Report Posted October 15, 2011 Not to mention, not every coil is going to read exactly 2ohms for a D2, 1 ohm for a D1, S1, etc. Power Acoustik does exaggerate certain points, but coil resistance isn't something I would be too worried about, lol. Quote Tell me...does this smell like chloroform to you?
SnowDrifter Posted October 16, 2011 Author Report Posted October 16, 2011 I feel like I had a brain fart. I kept on wondering what I was doing wrong / checking the sub, etc... It turns out that my ancient voltmeter has a loose connection on the ohms terminal. I used my friends multimeter to debug and it reads the resistance just fine. Its exactly 4.0 ohms Quote ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
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