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Amplifier Ohms?

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Old May 2, 2004 | 12:30 PM
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Default Amplifier Ohms?

How do I connect my amp at 2ohms and is bridging an amp the same thing?
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Old May 2, 2004 | 01:21 PM
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Default Re: Amplifier Ohms? (ltnate)

Ohms is the function of the driver you connect to it. If you hook up a 4 ohm speaker, the amp will make its rated power @ 4ohms. If you hook up a 2 ohm, the amp will make its rated power @ 2ohms.

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Old May 2, 2004 | 01:27 PM
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Default Re: Amplifier Ohms? (Kale)

Thanks Kale. So how do I bridge a 4 channel amp to run 2 speakers. will that give me more power?
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Old May 2, 2004 | 01:29 PM
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Default Re: Amplifier Ohms? (Kale)

One more question for you Kale. When I fade my speakers either left or right, I hear way more bass then when it's centered. Does this mean something is not hooked up correct? Thanks for your help
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Old May 2, 2004 | 01:55 PM
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Default Re: Amplifier Ohms? (ltnate)

The bass problem is from one speaker being out of phase. Check both left and right for correct polarity. What impedance drivers are you going to hook to the amp?
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Old May 2, 2004 | 02:07 PM
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Default Re: Amplifier Ohms? (EatRice)

I don't remember but they are the CDT 641 3-ways. So do I just reverse the connection of one of the speaker terminals on the amp for the phase problem?
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Old May 2, 2004 | 02:10 PM
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Default Re: Amplifier Ohms? (ltnate)

I don't remember but they are the CDT 641 3-ways. So do I just reverse the connection of one of the speaker terminals on the amp for the phase problem?
Eatrice put the hammer on the nail. Yes, just reverse one of them.


Usually you can bridge a 4 channel into a 2 channel for more power.
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Old May 2, 2004 | 02:16 PM
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Default Re: Amplifier Ohms? (Kale)

You two are great! I always hope one or both of you are online. Don't know if you read my other post but my entire system was stolen while getting some body work done. So again, how do I just use 2 channels of a 4 channel amp to get more power? Thanks again! Ok I just reversed the connections and it didn't help. I guess maybe since they are 3 way components maybe I need to check the actual connections at the speaker and/or the crossover. Does that sound right?


[Modified by ltnate, 11:24 AM 5/2/2004]
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Old May 2, 2004 | 03:54 PM
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Default Re: Amplifier Ohms? (ltnate)

Since its bass, try reversing JUST the leads to the woofer itself.

What brand/model of amp? The manual should cover bridging.
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Old May 2, 2004 | 03:57 PM
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Default Re: Amplifier Ohms? (Kale)

I'm using a Kicker KX 650.4 and I don't see anything that spells out how to bridge. Thanks a lot Kale.
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Old May 2, 2004 | 04:58 PM
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Default Re: Amplifier Ohms? (ltnate)

do you have the manual?
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Old May 2, 2004 | 04:59 PM
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Default Re: Amplifier Ohms? (Kale)

Yep, is bridging the same as Mono. If so, shouldn't I hear a significant power gain because I don't


[Modified by ltnate, 2:34 PM 5/2/2004]
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Old May 2, 2004 | 05:54 PM
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Default Re: Amplifier Ohms? (ltnate)

Kale is right you want to check the woofer on your three way but I would check all the speakers since you will have access to them. What speakers are you trying to connect to the amp to get the power gain. Yes mono is the same a bridged.

What speakers are you using to bridge the amp?
What impedance are those speakers?
Do they have one or two voice coils?
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Old May 3, 2004 | 06:50 PM
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Default Re: Amplifier Ohms? (EatRice)

I personally wouldn't bridge a 4 channel amp to run a set of components. You will double the power at the cost of quadrupling the total %THD.
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Old May 3, 2004 | 11:18 PM
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Default Re: Amplifier Ohms? (leolufse)

Hey thank you both for all the help. After further examination it appears when they stole my system they pulled one of the RCA cables and broke it. I couldn't see it but once I changed cables the sound was great. So you wouldn't bridge? Ok, I'll change that. Again thanks for all the help.
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Old May 4, 2004 | 07:14 AM
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Default Re: Amplifier Ohms? (leolufse)

I personally wouldn't bridge a 4 channel amp to run a set of components. You will double the power at the cost of quadrupling the total %THD.
And this will be audible how? It's still gonna be under .25%...if you can hear that then you should be working in a lab.

I would bridge it...those speakers love power and headroom is always a good thing.
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Old May 4, 2004 | 10:13 AM
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Default Re: Amplifier Ohms? (TheWacoKid)

Its .5% according to Kickers website. You'll get audible clipping when setting the gains.

Headroom is a great thing... when its clean.

Glad to hear you got the problem fixed.




[Modified by leolufse, 10:13 AM 5/4/2004]
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Old May 4, 2004 | 04:35 PM
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Default Re: Amplifier Ohms? (leolufse)

You'll get audible clipping when setting the gains.
Since when does THD=clipping? It is just the total deviance from the original signal, not the same as clipping the top of the waveform off. .5% is well below the audible limit, especially considering how much distortion speakers themselves add, and the placement in the car. The extra power he would gain would very much offset the miniscule increase in distortion(well, it seems weighted that way to me anyway, if I can't hear it, it doesn't bother me).
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Old May 4, 2004 | 10:33 PM
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Default Re: Amplifier Ohms? (TheWacoKid)

I would want my THD to be below .1 at home, .5 should be okay in a car, and we can't hear above 5 in the sub freqs. All amps are well below this, even Jensen
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