1 ohm woofer config with a 4 ohm amp
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=90460
Printed Date: May 09, 2024 at 1:40 AM
Topic: 1 ohm woofer config with a 4 ohm amp
Posted By: quengap
Subject: 1 ohm woofer config with a 4 ohm amp
Date Posted: February 14, 2007 at 9:20 AM
My question is simple, but I'm not sure of the answer. Configuration: 1 Alpine 4ohm mono amp/2 Kicker 12" 4 ohm woofers, wired in series/parrallel to 1ohm. What would be the short term effects and long term effects of amp and speakers (2) if the top configuration was left in place? Would the amp eventually blow? Would the speakers eventually blow? Thanks in advance... ------------- CW3 Patrick M. Quenga
251A/US Army Computer Engineer
Darmstadt, Germany
Replies:
Posted By: wotugot4me
Date Posted: February 14, 2007 at 9:30 AM
Do you know what the model of the amp is, unless im reading it wrong, is it 2 subs, with dual voice coils, 4 ohms per coil? is so the series/parallel would give you 4 ohms Assuming you are running a 1 ohm load on a amp that is only designed for a 4 ohm load id imagine that the amp would go into protection mode. If not then yes it would probably soon fry them amp. The speakers should be ok unless they are receiving a clipped signal or being extremely over powered, id imagine the amp would go first though.
Posted By: quengap
Date Posted: February 14, 2007 at 10:56 AM
Thanks for the quick response. The amp is an Alpine MRP-M650, mono, 4 ohm amp. The speakers are DVC 4ohm speakers, each. I have them running in parallel/parallel, which this website is telling me that is a configuration for 1ohm (I love this website, so informative). I'm sorry earlier, I had it wrong, thought it was series/parallel which is what I should be at. So they are in parallel/parallel 4ohm DVC speakers, which is 1ohm. I need to go change my config NOW! to series/paralle. Thanks wotugot4me! ------------- CW3 Patrick M. Quenga
251A/US Army Computer Engineer
Darmstadt, Germany
Posted By: aznboi3644
Date Posted: February 14, 2007 at 11:13 AM
Well...running that amp at 1 ohm can either...keep shutting down because of low impedance or eventually fry it
Posted By: jmelton86
Date Posted: February 23, 2007 at 3:38 AM
Since it's Mono, and namebrand, shouldn't the amp be able to go down to 2Ohms if not 1? ------------- 2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: quengap
Date Posted: February 23, 2007 at 3:48 AM
Yes, the Alpine will operate at 2ohm, but not at 1ohm. I read the instruction manual that Alpine had online, and it stated the amp will operate at 4ohm and 2ohm, in which the 2ohm operating mode puts out more power (of course), but runs hotter. So I just wired my speakers to a 4ohm configuration and left them at 4ohm, being that the amp had a 4 ohm and 2 ohm setting. I would rather be safe than spending more money later for a new amp (if it did run hot and eventually crap out). ------------- CW3 Patrick M. Quenga
251A/US Army Computer Engineer
Darmstadt, Germany
Posted By: jmelton86
Date Posted: February 23, 2007 at 4:31 AM
Trust me. Its an Alpine. It can easily go down to 2Ohms. Maybe a little hotter, bu that's of no concern -as long as the amp is right-side-up as to allow proper cooling. I would wire the subs parallel only using one voice coil each. This would draw a 2Ohm load. The Kickers should handle the power no prob. I've got 2 KickerComp(not VR) 10's getting about 250wrms each. More than 'recommended', but much clearer- perfectly fine as long as the amp is not clipping, or distorting.
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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001
Posted By: quengap
Date Posted: February 23, 2007 at 5:06 AM
OK thanks! I'll check into the wiring and see how it sounds. I know when I had it wired at 1ohm they did sound way louder. I'll have to play around some more, but thanks for the advice! I'll start messing around with it this weekend.
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CW3 Patrick M. Quenga
251A/US Army Computer Engineer
Darmstadt, Germany
Posted By: KarTuneMan
Date Posted: February 23, 2007 at 8:12 AM
RMS Power (at 14.4V THD+N, 20Hz-20kHz)
Per channel into 4 ohms: 400W x 1 (0.08% THD)
Per channel into 2 ohms: 600W x 1 Heres the specs from the Alpine web site. 1ohm= fried eggs. -------------
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