Is my amp compatible with lower/higher impedances?

[asilentfire 10+ year member]

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I have the Planet Audio AC1800.5 5-Channel amp and a pair of Lanzar MX694 speakers. The speakers are 4 ohms at 170 watts RMS each, and the amp can put out 210 watts RMS per channel, but the amp is rated for 2 ohm loads, not 4 ohms like the speakers.

My question is, will the speakers work with my amp, and if so what kind of RMS should I expect out of these speakers?

If the speakers only use 85 RMS then there is still 85 RMS left, which would work good with a set of 75 RMS JBL P560C component speakers I have, but they are 2 ohms, so if I ran both speakers parallel I would have an impedance below 2 ohms, and I don't know if the amp could take it.. is there a way to raise impedance?

I don't know, I should have never have bought the 4-ohm speakers in the first place..

Please let me know if you have any ideas on how I can make this work! THANKS!

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[quackhead 10+ year member]

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I have the Planet Audio AC1800.5 5-Channel amp and a pair of Lanzar MX694 speakers. The speakers are 4 ohms at 170 watts RMS each, and the amp can put out 210 watts RMS per channel, but the amp is rated for 2 ohm loads, not 4 ohms like the speakers.

My question is, will the speakers work with my amp, and if so what kind of RMS should I expect out of these speakers?

If the speakers only use 85 RMS then there is still 85 RMS left, which would work good with a set of 75 RMS JBL P560C component speakers I have, but they are 2 ohms, so if I ran both speakers parallel I would have an impedance below 2 ohms, and I don't know if the amp could take it.. is there a way to raise impedance?

I don't know, I should have never have bought the 4-ohm speakers in the first place..

Please let me know if you have any ideas on how I can make this work! THANKS!

I swear I have read this over and over....well, let's see..You have a set of Comps and a pair of 6x9's...and a 5 ch amp.. Sub(s)?....are you putting the 6x9's in the front of your vehicle?

 

[quackhead 10+ year member]

....nevermind, I would suggest running the comps in the front, off of the front L/R channels...run the 6x9's to the rear L/R channels of your PA. I am assuming this was the design in mind?

 

[asilentfire 10+ year member]

yes, this is the design, but how will 4 ohms work with the amp?

 

[quackhead 10+ year member]

yes, this is the design, but how will 4 ohms work with the amp?

well the amp is rated to supply 170 watts at 4 ohms, or 210 watts at 2 ohms. This means each 2 ohm comp set (mid/tweet) will receive 210 watts per channel R/L, and each 6x9 will receive 170 watts per channel R/L. the amp is stable from 2 to 4 ohms.

 

[quackhead 10+ year member]

What sub do you have in mind?

 

[asilentfire 10+ year member]

Actually I have a Pioneer TS-W309D4 12", 400 RMS, I have everything I need except speaker wire.

The problem that I saw is that the comps are already in front at 75 RMS, while the back will be running at 170 RMS. I would like the front to be louder. I have a 1997 Mustang with 6x8" speaker openings, so the 6x9s would be easier to put in the back. I'm wondering if I should buy louder speakers for the front if I could still make use of the comps somehow in this system, but I don't think I can because they are already 2 ohms.

BTW, where did you find that my amp is rated at 170 RMS at 4 ohms?

 

[quackhead 10+ year member]

Actually I have a Pioneer TS-W309D4 12", 400 RMS, I have everything I need except speaker wire.
The problem that I saw is that the comps are already in front at 75 RMS, while the back will be running at 170 RMS. I would like the front to be louder. I have a 1997 Mustang with 6x8" speaker openings, so the 6x9s would be easier to put in the back. I'm wondering if I should buy louder speakers for the front if I could still make use of the comps somehow in this system, but I don't think I can because they are already 2 ohms.

BTW, where did you find that my amp is rated at 170 RMS at 4 ohms?

My bad...I think I was confused in your first post with the 6x9 rating of 170w..here is the reality, the amp is rated 210watts@ 2ohm, so that means it will send 210 watts to each of the front mid/tweet pair. The 6x9 is 4ohm, so the amp will put less to them than the front at 2ohm. #1, this could damage the front speakers by over powering them. You say the can handle 75 watts input power...the amp specs to deliver 210watts output power..BUT you have a budget amp, which normally will not put that much power out playing music...If they did 210w of Clean undistorted rms power x4, I think everyone here would own one for $150 bucks! So, you might be ok, just listen for distortion and adjust the gain where you can play them loud enough without distorting them.

 

[trumpet 5,000+ posts]

You can run 2 Ohm speakers on the front pair of channels and 4 Ohm speakers on the rear pair of channels without problems.What you might notice by using 2 Ohm 6.5s up front and 4 Ohm 6x9s in the back is a better balance to the sound. Typically larger speakers in the back will be louder than the front speakers if they're all amplified and they're all the same impedance. This is usually "fixed" with the fader on the head unit if it's bothersome.

Use 1 pair of 2 Ohm speakers and the impedance won't be less than 2 Ohms per channel. There's no need to wire anything in parallel.