CMX-2

[G-Man]

Very considerate of them to do that even though they didn't have to. Classy move.

[Nemesis.ie]

Come on the 230v version!

[G-Man]

Has anyone here used these products? I wasn't even interested at the previous high prices, but now it might be worth a look. But before I do, I'm curious how effective these devices are at doing anything beyond being a power strip.

[matt]

If your amp physically hums or vibrates, then give the CMX a try. All Emotive products have basic noise filtering built in, but they do not remove a DC offset before the large transformer, which can cause hum. Not everyone's 120V circuit has this issue.

[Nemesis.ie]

A guy who bought a Rythmik sub and had terrible transformer hum (at certain times of the day from some external source (probably the nearby school)) said the hum was reduced by 90% by using one of these.

[dragonV]

Apr 27, 2012 5:27:08 GMT -5 Nemesis.ie said:

Come on the 230v version!

Agreed.....

Please don't forget us OS customers!!!!! -

[richardrc]

I hope the OS version can sustain 250vac continuous as our supply varies between 245-260vac.
I know this to be the case because my UPS logs the vac and occasionally goes into AVR mode which which drops the line voltage 40vac.

[Nemesis.ie]

I'm sure it will - 230v is just the standard the input should be but there would always be a +/- tolerance.

[richardrc]

Australian standard was 240vac but is now 230vac to bring it into line with Europe. Mostly still 240vac as it is within +10%

[roadrunner]

I believe the CMX-2/CMX-6 both are designed to handle +/- 20% on the voltage and current specs. As such, you should have no trouble using them with your electrical service.

[jottle]

anyone have one of these. Care to comment on it?

[Pauly]

I hope to have one soon. I've been pouring money into my motorcycle, so I just haven't been able to buy the CMX-2 yet. But when I do, I'll be sure to report on whether or not it fixed my transformer hum.

[NezFF]

I'm interested if the cmx6 will be any better than this old monster surge protector I've had.

[richardrc]

Hopefully the international version will come with IEC sockets? and perhaps a couple of IEC to IEC cables!

[Pauly]

My CMX-2 has shipped. So hopefully on Friday my transformer will be silenced!

[weird23]

Jun 18, 2012 13:27:34 GMT -5 Pauly said:

My CMX-2 has shipped. So hopefully on Friday my transformer will be silenced!

I got the CMX-2 awhile ago and it did nothing to quite my humming XPA-5. Hopefully you'll have more luck than I did.

[Pauly]

Hmmm, that's too bad. Have you tried tightening the bolt on the transformer?

[hpc]

The CMX-2 is not going to cure groundloops; it might reduce their impact, but
eliminate....

I believe quite a few have posted the cookbook approach (how-to) to eliminating groundloops - it's
a royal pain UNLESS you hit it on the first try.

This is NOT a post against the CMX-2 - it's a fine product from a very fine company.

[Pauly]

True, but it's not advertised to eliminate ground loops. We're talking about DC offset on the AC power line, which is known to cause transformers to hum/buzz, and that's what the CMX-2 is supposed to eliminate.

[weird23]

Jun 18, 2012 16:19:36 GMT -5 Pauly said:

Hmmm, that's too bad. Have you tried tightening the bolt on the transformer?

I have not, I'll give it a try.

I don't think it's ground loop as none of the other amps in my system hum, the XPA-5 is the one and only culprit of any noise.