1 ohm woofer config with a 4 ohm amp

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quengap

Member - Posts: 4

Joined: February 14, 2007

Location: United States

Posted: February 14, 2007 at 9:20 AM / IP Logged

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

wotugot4me

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Joined: March 09, 2005

Location: United Kingdom

Posted: February 14, 2007 at 9:30 AM / IP Logged

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.

quengap

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Joined: February 14, 2007

Location: United States

Posted: February 14, 2007 at 10:56 AM / IP Logged

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

aznboi3644

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This member consistently provides reliable information

Joined: May 01, 2006

Location: United States

Posted: February 14, 2007 at 11:13 AM / IP Logged

Well...running that amp at 1 ohm can either...keep shutting down because of low impedance or eventually fry it

jmelton86

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Location: South Carolina, United States

Posted: February 23, 2007 at 3:38 AM / IP Logged

Since it's Mono, and namebrand, shouldn't the amp be able to go down to 2Ohms if not 1?

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quengap

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Location: United States

Posted: February 23, 2007 at 3:48 AM / IP Logged

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

jmelton86

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Posted: February 23, 2007 at 4:31 AM / IP Logged

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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quengap

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Joined: February 14, 2007

Location: United States

Posted: February 23, 2007 at 5:06 AM / IP Logged

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.

CW3 Patrick M. Quenga

251A/US Army Computer Engineer

Darmstadt, Germany

KarTuneMan

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Posted: February 23, 2007 at 8:12 AM / IP Logged

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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1 ohm woofer config with a 4 ohm amp

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