Deleted
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Post by Deleted on Mar 4, 2014 21:15:39 GMT -5
I realize that only the CMX-6 is available at the moment, but what are the differences between it and the CMX-2 anyway? I thought that the CMX-6 was the same as the CMX-2 just with more outlets. In another forum it was stated that the CMX-2 is actually superior to the CMX-6 because of its superior filtering capability that includes correcting for DC offset not offered on the CMX-6. Hmmmm? After reading the product descriptions page on these I am not exactly sure what this differences between these two are, if any, concerning filtering?
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Post by cwmcobra on Mar 4, 2014 21:27:42 GMT -5
This was discussed in the past (1.5-2 years ago?). I can't find the thread, but the bottom line is that the CMX-2 is superior to the CMX-6 because only it has the "Precision DC offset eliminator". The recommended solution for those that need more than two outlets and want the superior performance is to buy both and plug the CMX-6 into one of the outlets on the CMX-2. That way you have 7 outlets with the superior filtering performance.
Perhaps others will provide a more detailed or technical answer. I bought both!
Cheers!
Chuck
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Post by novisnick on Mar 5, 2014 0:41:18 GMT -5
I just purchased the CMX-6 and would like to know if it is in fact inferior to the XMC-2.
Nick
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Post by repeetavx on Mar 5, 2014 0:57:17 GMT -5
The CMX-2 has a three leg RF filter and a DC offset correction circuit.
The CMX-6 has a three leg RF filter and nothing else. Well, four more outlets.
Both are designed to not limit current to any device that it will feed including BIG power amps.
These power filters are the only power conditioners that Emotiva recommends for any of their products.
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Post by novisnick on Mar 5, 2014 1:07:18 GMT -5
The CMX-2 has a three leg RF filter and a DC offset correction circuit. The CMX-6 has a three leg RF filter and nothing else. Well, four more outlets. Both are designed to not limit current to any device that it will feed including BIG power amps. These power filters are the only power conditioners that Emotiva recommends for any of their products. What does a DC offset do,,,or not do??? |
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Post by geebo on Mar 5, 2014 8:06:28 GMT -5
The CMX-2 has a three leg RF filter and a DC offset correction circuit. The CMX-6 has a three leg RF filter and nothing else. Well, four more outlets. Both are designed to not limit current to any device that it will feed including BIG power amps. These power filters are the only power conditioners that Emotiva recommends for any of their products. What does a DC offset do,,,or not do??? For one thing, it can cause transformers to buzz and run warmer than usual. |
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KeithL
Administrator 
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Post by KeithL on Mar 5, 2014 9:43:42 GMT -5
You are entirely correct. As for technical details..... The AC line should consist of an AC sine wave - which contains no DC component (DC doesn't pass through a transformer, like the one on your power pole). However, certain devices, when connected to the circuit, can impose an unbalanced load in such a way that they cause a DC offset to appear on the line. When this happens you end up with a small fraction of a volt of DC on the line along with the AC that belongs there. (Heavy duty light dimmers are a common cause.) Power transformers are designed to operate with a pure AC power source; if any DC is present, it will cause excess current to flow in the transformer, which will cause the transformer core to tend to saturate (how bad the problem is will depend on the transformer design and the amount of DC present). If this happens, the transformer will run hotter, its ability to deliver the AC current it is designed to deliver is reduced, and it may also mechanically hum more... all of which compromise its ability to do its job well. If there is DC offset present on your power lines, the CMX-2 will eliminate it. (To be perfectly clear, the CMX-2 will block any DC offset from reaching anything that is plugged into it.) Other than the DC offset eliminator, the filtering on the CMX-2 and the CMX-6 for other types of noise is the same. This was discussed in the past (1.5-2 years ago?). I can't find the thread, but the bottom line is that the CMX-2 is superior to the CMX-6 because only it has the "Precision DC offset eliminator". The recommended solution for those that need more than two outlets and want the superior performance is to buy both and plug the CMX-6 into one of the outlets on the CMX-2. That way you have 7 outlets with the superior filtering performance. Perhaps others will provide a more detailed or technical answer. I bought both! Cheers! Chuck |
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Post by novisnick on Mar 5, 2014 9:54:27 GMT -5
You are entirely correct. As for technical details..... The AC line should consist of an AC sine wave - which contains no DC component (DC doesn't pass through a transformer, like the one on your power pole). However, certain devices, when connected to the circuit, can impose an unbalanced load in such a way that they cause a DC offset to appear on the line. When this happens you end up with a small fraction of a volt of DC on the line along with the AC that belongs there. (Heavy duty light dimmers are a common cause.) Power transformers are designed to operate with a pure AC power source; if any DC is present, it will cause excess current to flow in the transformer, which will cause the transformer core to tend to saturate (how bad the problem is will depend on the transformer design and the amount of DC present). If this happens, the transformer will run hotter, its ability to deliver the AC current it is designed to deliver is reduced, and it may also mechanically hum more... all of which compromise its ability to do its job well. If there is DC offset present on your power lines, the CMX-2 will eliminate it. (To be perfectly clear, the CMX-2 will block any DC offset from reaching anything that is plugged into it.) Other than the DC offset eliminator, the filtering on the CMX-2 and the CMX-6 for other types of noise is the same. This was discussed in the past (1.5-2 years ago?). I can't find the thread, but the bottom line is that the CMX-2 is superior to the CMX-6 because only it has the "Precision DC offset eliminator". The recommended solution for those that need more than two outlets and want the superior performance is to buy both and plug the CMX-6 into one of the outlets on the CMX-2. That way you have 7 outlets with the superior filtering performance. Perhaps others will provide a more detailed or technical answer. I bought both! Cheers! Chuck So KeithL, should I return my CMX-6? How can I test to see if I actually need the CMX-2 instead of the CMX-6? Thanks so much. Nick |
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Post by monkumonku on Mar 5, 2014 11:29:21 GMT -5
CMX-2 or CMX-6, it is important to have some sort of protection for your components so that their circuit boards don't wind up looking like this:  |
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Post by creimes on Mar 5, 2014 12:13:50 GMT -5
So my question is why not make the CMX-2 and CMX-6 the exact same, is it a space limitation thing..?, would the CMX-6 with 4 more outlets need to be that much bigger due to the extra parts needed. I do own both and use the CMX-2 for my XPA-5 and CMX-6 for my other devices.
Chad
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Post by novisnick on Mar 5, 2014 12:31:52 GMT -5
So my question is why not make the CMX-2 and CMX-6 the exact same, is it a space limitation thing..?, would the CMX-6 with 4 more outlets need to be that much bigger due to the extra parts needed. I do own both and use the CMX-2 for my XPA-5 and CMX-6 for my other devices. Chad What Chad said! I now own both but have not had time to install the CMX-6 just yet. Received on Monday. Nick |
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Post by repeetavx on Mar 5, 2014 12:51:57 GMT -5
For a long time I ran my CMX-2 like this. One of the outputs went to my XPA-2. The other outlet went to my "other" line filter that fed everything else. My CMX-2 came with a standard looking 16 guage power cord. I have since switched that out to a much larger power cord. My suggestion is that you get at least the X Series IEC Shielded Power (12 guage) power cord since that one cord is powering everything else in your system. And if it's one thing Emotiva is adamant about, it's that you shouldn't "choke" their power amps. |
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Post by jedinite24 on Mar 5, 2014 14:11:21 GMT -5
For a long time I ran my CMX-2 like this. One of the outputs went to my XPA-2. The other outlet went to my "other" line filter that fed everything else. My CMX-2 came with a standard looking 16 guage power cord. I have since switched that out to a much larger power cord. My suggestion is that you get at least the X Series IEC Shielded Power (12 guage) power cord since that one cord is powering everything else in your system. And if it's one thing Emotiva is adamant about, it's that you shouldn't "choke" their power amps. Oh man. I'm sad to hear that. I bought the Emotiva CMX-2 and CMX-6 when they first came out and the power cords that came with them were quite good in terms of overall quality. I compared to the cords to the newer Volex 17604 power cords that are labeled BaoHing and those stock Emotiva power cords trumped them when doing a physical comparison. Connectors were beefier and other overall thickness of the cable was thicker even though both had the same gauge of 14AWG. I'll snap some pics and post later. As for the CMX-2 or CMX-6 differences. My 2 channel set-up gets the CMX-2 and my HT set-up gets the CMX-6 based on need. With my gear and systems I don't think I've had a problem using either one. With both I have isolation transformers plugged into them and haven't had any problems. If the OP could somehow measure or detect how much DC is coming from the outlet would that help in seeing whether or not the CMX-6 would be enough? |
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Post by repeetavx on Mar 5, 2014 17:07:21 GMT -5
Oops. Were they 14 guage? I'm a glutton for bigger is better.
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Post by cwmcobra on Mar 5, 2014 17:12:18 GMT -5
Yep. The product descriptions spec 14 AWG for both CMX-2 and CMX-6.
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Post by mercury on Mar 26, 2014 21:54:39 GMT -5
I have a CMX-6 and I noticed that the line status monitoring LEDs doesn't light up. It used to indicate line correct ( left & middle pilot lights on )I think the line monitoring feature is busted. Tried plugging the CMX-6 on other outlets still no light. Although the CMX6 is still providing current on its 6 outlets , I'm just curious if it is still functioning properly especially noise filtering. Is the line monitoring feature a different circuit on its own? Any input or thoughts would appreciate it. Thank you.
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Post by audiosyndrome on Mar 27, 2014 12:22:29 GMT -5
I'm looking at the 2 and the 6 but I've noticed that neither provides any protection against transients on the line (lightning, etc.). What are the 2 and 6 users using for transient line protection? For Emotiva and other manufacturers components? Thanks.
Russ
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Deleted
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Post by Deleted on Mar 27, 2014 23:24:13 GMT -5
Is there a consideration that is important when using different classes of power amps with the CMX-2, and CMX-6? My Adcoms are class A/B and at times need to be re-biased and the DC offset put in check. The DriveCores are class D and do not have to be biased at all, and because of their design DC offset isn't a concern. So with the DriveCores would it be unnecessary to use them with the CMX-2's?
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Post by Percussionista on Mar 28, 2014 11:30:27 GMT -5
The CMX-2 has a three leg RF filter and a DC offset correction circuit. The CMX-6 has a three leg RF filter and nothing else. Well, four more outlets. Both are designed to not limit current to any device that it will feed including BIG power amps. These power filters are the only power conditioners that Emotiva recommends for any of their products. Hmm... I've been getting interested in a Furman module which I would think satisfy Emo's worries about current limitation, and offer some protection as well as RF filtering. I also like their "component" shape which stacks or racks well, have on/off switches and an extra outlet on the front. Specifically I've been looking at the Furman PL-PLUS C, $229.95 from Sweetwater at the moment - yes, about the same cost as a CMX-2 and -6 combined ;-) Given the Stealth-8's are Pro monitors it would seem the Furman's are in the right ballpark, as long as there is no effect on SQ. |
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Post by LuisV on Mar 28, 2014 13:03:04 GMT -5
I recently had whole home surge protectors wired into each of my panels (1st and 2nd floor), so my assumption is that I can forgo the Panamax M5100PM that I am currently using in my HT setup. Please correct me if I am wrong. I have two pairs of outlets on the wall by my components (basically behind each main speaker). Would it be best to use a CMX-2 for my amps plugged into one outlet and then a CMX-6 for the other components plugged into the other? Plug both into the same outlet?
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