M100 into 2 ohm mono?

scottn29 · Post by **scottn29** » Wed May 27, 2009 8:14 am

Cant his amp handle that, I see on amp guts it says it can but doesnt give a spec for it. What kind of power should it do at 2 ohm mono if it can handle it?

Post by **kg1961** » Wed May 27, 2009 8:16 am

I don't know the power but she will get hot hot hot!!!
my guess would be 600-700watts but it might be regulated?

scottn29 · Post by **scottn29** » Wed May 27, 2009 8:18 am

Heat isnt gonna be a problem, I will be putting plenty of fans on them, I was just looking at some of these, I am trying to get some MS for the install

Post by **fuzzysnuggleduck** » Wed May 27, 2009 8:27 am

This is 100% anecdotal but my M100 failed not long after I started running her at 2 ohms mono. It was running really hot.

My opinion? Meager difference in power output isn't worth the risk.

scottn29 · Post by **scottn29** » Wed May 27, 2009 8:32 am

fuzzysnuggleduck wrote:This is 100% anecdotal but my M100 failed not long after I started running her at 2 ohms mono. It was running really hot.

My opinion? Meager difference in power output isn't worth the risk.

I am looking for something for my sub which is a dual 4 so its got to be 2 or 8 ohm mono

Post by **fuzzysnuggleduck** » Wed May 27, 2009 8:54 am

scottn29 wrote:
fuzzysnuggleduck wrote:This is 100% anecdotal but my M100 failed not long after I started running her at 2 ohms mono. It was running really hot.

My opinion? Meager difference in power output isn't worth the risk.
I am looking for something for my sub which is a dual 4 so its got to be 2 or 8 ohm mono

You can run it at 4 ohms stereo if you have the knowledge to gain match your channels but if you're just looking at which amp to buy there is likely a better match for your sub in another amp.

Post by **Bfowler** » Wed May 27, 2009 8:55 am

you can pull off the m100 at 2ohms...but...

you will NEED a cooling rack with push/pull fans. a 1 farad capacitor, and at least a dedicated 4awg for it.

scottn29 · Post by **scottn29** » Wed May 27, 2009 9:02 am

fuzzysnuggleduck wrote:
scottn29 wrote:
fuzzysnuggleduck wrote:This is 100% anecdotal but my M100 failed not long after I started running her at 2 ohms mono. It was running really hot.

My opinion? Meager difference in power output isn't worth the risk.
I am looking for something for my sub which is a dual 4 so its got to be 2 or 8 ohm mono
You can run it at 4 ohms stereo if you have the knowledge to gain match your channels but if you're just looking at which amp to buy there is likely a better match for your sub in another amp.

Does the M100 have independant gains for the left and right channel?

Post by **fuzzysnuggleduck** » Wed May 27, 2009 9:48 am

scottn29 wrote:Does the M100 have independant gains for the left and right channel?

Haha! Caught me! I didn't check but now that you mention it, it does in fact have a single master gain control on the outside. Which only makes sense. That's twice in two days that I blurted shit out without thinking!

Still, I would check to make sure the amp is actually gain matched internally before hooking up a DVC to it in 4 ohms stereo.

Post by **Bfowler** » Wed May 27, 2009 9:55 am

8ohm mono would accomplish the same thing?

vin78 · Post by **vin78** » Wed May 27, 2009 9:56 am

Im not sure on the 2 ohm mono, but its pretty stout at 4 ohm mono. Zed tested my M100 against my MS2125 and both made 600wrms @ 4 ohm mono

scottn29 · Post by **scottn29** » Wed May 27, 2009 10:28 am

Bfowler wrote:8ohm mono would accomplish the same thing?

I dont think I would be happy with it at 8 ohm mono if its putting out half of its power at 4ohm. i am one of those that like headroom in his amps. I just picked up a MS2250 to use, that will work better

Post by **Bfowler** » Wed May 27, 2009 10:37 am

scottn29 wrote:
Bfowler wrote:8ohm mono would accomplish the same thing?
I dont think I would be happy with it at 8 ohm mono if its putting out half of its power at 4ohm. i am one of those that like headroom in his amps. I just picked up a MS2250 to use, that will work better

i just meant compared to 4ohm stereo. i think 8ohms would be a bit of a waste also

Post by **stipud** » Wed May 27, 2009 10:38 am

scottn29 wrote:
Bfowler wrote:8ohm mono would accomplish the same thing?
I dont think I would be happy with it at 8 ohm mono if its putting out half of its power at 4ohm. i am one of those that like headroom in his amps. I just picked up a MS2250 to use, that will work better

You do realize that half power is only a 3dB difference, right?

scottn29 · Post by **scottn29** » Wed May 27, 2009 10:43 am

stipud wrote:
scottn29 wrote:
Bfowler wrote:8ohm mono would accomplish the same thing?
I dont think I would be happy with it at 8 ohm mono if its putting out half of its power at 4ohm. i am one of those that like headroom in his amps. I just picked up a MS2250 to use, that will work better
You do realize that half power is only a 3dB difference, right?

Yes I do realize that, but you also have a higher chance of clipping when you push it hard with less power, thats why I always like headroom, cleaner signal is always a good thing

Post by **stipud** » Wed May 27, 2009 10:54 am

scottn29 wrote:Yes I do realize that, but you also have a higher chance of clipping when you push it hard with less power, thats why I always like headroom, cleaner signal is always a good thing

Technically you have more "headroom" at 8 ohms than you do at 4. The amp is capable of putting out more power, but because of the load/gains/etc, it isn't. You are running the parts below their maximum levels, so when the occasional dynamic musical spike comes along, the amp is able to take it in stride.

Not that more power is a bad thing either, in fact, it is much more noticeable than headroom.