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post #1 of 8 (permalink) Old 05-20-2015, 08:11 PM Thread Starter
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Ohm my god....

Sorry, I had to...


So my question is, can someone please clarify the difference in impedance? MoCo put two Ohm speakers in the 15 fltr. I switched them out to a pair of Polk Audio 6.5s that are 4 Ohm. Will this cause an issue down the road? IIRC, the lower the impedance, the easier the current travels to the voice coil / magnet. Using a higher impedance speaker will make the internal amp work harder. Is that correct?

I am also experiencing the sound wash out that everyone else seems to be having, where the volume fluctuates at speed. Are the 4 Ohms exacerbating this? Has anyone come up with a definitive solution to the issue yet?
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post #2 of 8 (permalink) Old 05-20-2015, 08:20 PM
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4 ohm speakers won't hurt a 2ohm system, you just won't get all the power output thats possible. However 2ohm speakers will overwork a 4ohm system, you should be ok. I don't know anything about your other issue.

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post #3 of 8 (permalink) Old 05-21-2015, 02:38 PM
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It is important to achieve the Ohm rating of the amp. You need to determine how to wire your speakers. You can either wire them in "Series", or "Parallel".

If you were to wire your 4 Ohm speakers in "Series", you will have an output of 8 Ohms. - NOT good for your amp, or your speakers.

If you wire your 4 Ohm speakers in "Parallel", you will have an output to match the amp of 2 Ohms.

Look up Ohm's Law, and wiring speakers on the internet. There is a ton of information on this subject. If the Ohms aren't matched you WILL blow your speakers. UNDER POWERED speakers WILL BLOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!

I hope this helps and good luck.

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post #4 of 8 (permalink) Old 05-21-2015, 03:22 PM Thread Starter
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So.....

If I remove my factory 2 ohm speakers and directly replace them with 4 ohm speakers, is it going to do damage? I understand series v. parallel, but am not sure if I am overtaxing my radio's amp...
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post #5 of 8 (permalink) Old 05-21-2015, 03:55 PM
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Quote:
Originally Posted by Drucifer View Post
So.....

If I remove my factory 2 ohm speakers and directly replace them with 4 ohm speakers, is it going to do damage? I understand series v. parallel, but am not sure if I am overtaxing my radio's amp...
Im not 100% sure with the new Harley Davidson Audio set up, but from my Musician days if we did not wire speakers for the correct Ohm's, we would do a lot of damage to the amplifier, and the speakers. I would possibly contact one of the engineers at Polk Audio, and get their opinion.

If it were me, I'd be doing more research on this than just posing this question on a forum. I mean, your bike ain't cheap, and it's electronics are pricey too.

Make damn sure you are comfortable with what you are doing, so you don't end up with a bigger mess on your hands. Hell, maybe even contact Harley Davidson. They might have the answer your looking for, but don't be disappointed if they try to sell you their "Boom" audio set up.

I don't think i'm of any more help to you.-Sorry, & Good Luck with your efforts.

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post #6 of 8 (permalink) Old 05-21-2015, 03:59 PM
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I'm sure someone will chime in with the exact answer soon. There are a lot of really good people on this forum. Be patient. I know it ain't easy.

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post #7 of 8 (permalink) Old 05-21-2015, 04:15 PM
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Quote:
Originally Posted by Drucifer View Post
So.....

If I remove my factory 2 ohm speakers and directly replace them with 4 ohm speakers, is it going to do damage? I understand series v. parallel, but am not sure if I am overtaxing my radio's amp...
No, it will not hurt your amp, you just won't get maximum efficiency and output. Your amp will be under working. No harm at all.

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post #8 of 8 (permalink) Old 05-21-2015, 06:35 PM
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The system will be not near as loud. That's all. You will have to turn the volume up a lot more to hear.
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