8 ohms or 2 ohms????????

[ferret7cs 10+ year member]

I just bought the 12" Alpine Type-R and i got the 4ohm + 4ohm one... which makes it go to either 8 ohms or 2 ohms on the wiring... I cant return the sub and get the 2ohm + 2ohm sub... so im just wondering which one would be better to wire it with...

I got a 600W Max Kenwood amp and im gunna bridge it to give 300W X 1 to this sub.. the sub wants 100-300 W RMS ... so again my question is... 2 ohms or 8 ohms?

Thanks

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[ss3079 5,000+ posts]

That Kenwood probably does that 300w x 1 @ 2 ohm...so I would say wireyour Type R to 2 ohms.

- Steve

 

[jbl_marshall21 10+ year member]

most amps r 4 ohm stable when u bridge them. so go with the 2ohm+2ohm to get a 4 ohm load for the amp. ur amp will last longer then and u'll be getting 300 watts to the sub

 

[ss3079 5,000+ posts]

Originally posted by Jmac Unfortunately, you REALLY shouldn't wire Kenwoods down to 2 ohms ...

 

I tried that once on my Kenwood KAC-929 and it kept going into protection like every 10-15 minutes ...

Who knows...maybe on his amp it wont shut down.

- Steve

 

[ss3079 5,000+ posts]

Originally posted by Jmac Maybe //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif If he puts a couple fans on it //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Or just lucks out //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif//content.invisioncic.com/y282845/emoticons/satan.gif.9c6a335ed7aeeed3ee273e573f1fcaac.gif

- Steve

 

[ftgu 10+ year member]

True....If the power wire is big enough & the alt. can supply the current, it probably should be ok.

 

[ss3079 5,000+ posts]

Originally posted by Jmac ??? What does that have to do with the amplifier not being two ohm mono stable ?

Maybe he was talking about it over heating and shutting down??

- Steve

 

[ftgu 10+ year member]

If the amplifier can not get the current that it needs( due to a small power wire, or alternator) 2 things can happen, the amp will go into protect or fuses will snap.

 

[2theMaxx21 10+ year member]

When running an amp with a low ohm load, try to keep your "gain" as low as possible, and your input signal voltage as high as possible. This will keep your amp a little bit cooler, and more efficient.

Most amps only go into "protection mode" when they either:

1. get too hot

2. the signal is clipping

3. not getting enough voltage

4. pulling too much current (not enough resistance from the subs' motor, low ohms)

When you have low voltage, the amp has to pull more current to put out the same wattage, so keep your voltage nice and high (but not higher than 14.4). When you pull more current than the power wire can handle, you will blow a fuse, or melt your power wires if you don't have it fused properly.

Most amps will automatically shut off when the voltage gets down around 10 volts. This protects the amps from trying to pull large amounts of current to compensate for the low voltage.