MC2 E45 amp ability to power 2 ohm circuit |
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Lillike_natnek
Registered User Joined: 29 October 2019 Location: Netherlands Status: Offline Points: 32 |
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Posted: 10 December 2020 at 10:08am |
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Hi all,
Yesterday I also made a post in the scoop forum for driver recommendations where we're deciding to go for 2x 8ohm or 2x 4ohm drivers for our hog scoops (so resistance of circuit becomes 2 or 4 ohm respectively). The amp that we will use is the MC2 E45, which according to the spec sheet should be able to power a 2ohm circuit with a max output power of 4200W. Now this seems more appealing than a 4ohm circuit which has a max power output of 2500W. Many times I read that 2 ohm is not good for the amp etc. but can anyone explain why this is? If the spec sheet says the amp supports 2 ohm circuits, then what would hold us back from utilising that? I've been reading up on it but I can't really find a definitive explanation. We've been discussing this topic with the people of our soundsystem but we don't really know what to do (we don't have a lot of experience). If anyone could shine a light on this that would be really helpful! Cheers
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Sinai Sound
Young Croc Joined: 09 November 2009 Location: Sheffield Status: Offline Points: 631 |
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2ohm playing aggressively loud 40hz?
or 2ohm playing 10khz at low volume ... Both are quite a different load on an amplifier, but both are "2ohm" (also before the nerds get at me, that's 2ohm nominal, very much aware it changes with frequency etc etc )
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Lillike_natnek
Registered User Joined: 29 October 2019 Location: Netherlands Status: Offline Points: 32 |
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Guess leaning more towards the former, as it should handle the power of two hog scoops at max volume (I'd say 35 - 80/100Hz)
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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Being on this forum for several years, I learned one thing.
There is definately a different understanding in sound when it comes to different music genres. Personally I would not bother about the last 2dB (its a very small difference). If you really want that extra, you would be better of with more cabs imho. What kind of music is it actually? And yes, the E45 could handle 2 Ohm loads (with the test conditions specified in the manual), however, I would not run it that way for different reasons like durability etc. Heavy 2 Ohm load will require more current which then results in more heat. PS: if you're after a transformer amp, I have a Infinite 7v2 for sale. Not a 8v2 but it can do for some occasions.
Edited by smitske96 - 10 December 2020 at 10:37am |
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cravings
Old Croc Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7441 |
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if your car is sold as being capable of 150mph, you probably shouldn't drive it at that speed all the time.. cos it'll start to wear out.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Driving the amp at 2 ohms will shorten it's life by years. And as hinted above, any gain you think you are getting is destroyed by power compression. Stick to 8 ohm drivers - and you could then, at some point, add another cab per side without over-stressing the amp - which is far better. |
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Earplugs Are For Wimps!
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Sinai Sound
Young Croc Joined: 09 November 2009 Location: Sheffield Status: Offline Points: 631 |
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Powersoft K10 / K20 will do this. Ran it like this in anger many many times until upgrading to X8.
Void Inf8 v2 will do it on a decent supply (seen peaks of 40a on the front doing what you're asking, "2ohm" load per side), but also probably pop fuses internally, again seen it happen. |
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Sinai Sound
Young Croc Joined: 09 November 2009 Location: Sheffield Status: Offline Points: 631 |
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This was a 4 x 8ohm drivers per side (so 2ohm nominal), running the frequency you want to play, at loud volumes |
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Lillike_natnek
Registered User Joined: 29 October 2019 Location: Netherlands Status: Offline Points: 32 |
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Mixed genres basically, mostly dub/dnb/techno I'd say. Could you explain what a transformer could mean for us in this scenario?
That makes sense
Yeah that sounds like a solid plan for the future. But then for future expansion we could also have gone for 2x 4Ohm drivers per channel instead of 2x 8 ohm drivers. But reading all the other comments I guess we should waive that idea. It just sounded attractive as the output power is higher but I'm starting to understand that this is just bad for the amp.
I'm afraid that's a bit out of our budget haha. I guess moral of the story is that we should not go for a 2ohm nominal circuit. Did your void amps survive that current? Edited by Lillike_natnek - 10 December 2020 at 11:06am |
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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Do you already have the hog and the other cabs? If no, I would advise you to look at the latest paraflex options. More and more designs are getting tested, and look really promising. Btw they also have various kick designs if needed.
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Lillike_natnek
Registered User Joined: 29 October 2019 Location: Netherlands Status: Offline Points: 32 |
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Yes we've got all cabs already. Only need to put drivers in our hogs, the rest is all done. Never heard/read about paraflex cabinets yet, got some links to read up about?
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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There is a whole dedicated forum on fb (if you have fb).
I can send you the link if you want.
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