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#259958 - 05/11/09 11:06 AM EP-350 V3 warmup?
Lysol Offline
newbie

Registered: 05/11/09
Posts: 4
I just received twin EP-350 V3 subs. They replace my older EP-175 and I'm using them with M22's and tube amplification.

They sound great. I had to set them up reverse phase (which I thought unusual, as they are set up next to my mains), this has been confirmed by low bass test tones.

My question is this: After I start a record or CD, the Subs wake-up and the pilot light goes green. However, the subs seem to take a minute or so to warm up and actually turn on. If I put my ear next to the driver, I can hear a faint mechanical noise. ??

I assume this is normal as both subs behave the same way. I can't imagine both behaving abnormally. Is a voice coil warming up? Is there enough voltage to wake up but not really get going? I can force them on it seems by raising the volume for a few seconds or using a small battery to the leads. With the old EP-175, once they went green, they were "on"

Anyone experience this?

Thanks

Dave

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#259960 - 05/11/09 11:12 AM Re: EP-350 V3 warmup? [Re: Lysol]
SirQuack Online   shocked
shareholder in the making

Registered: 01/29/04
Posts: 13325
Loc: Iowa
The noise your talking about is normal, my twin 350v3's do the same thing the first time they receive a signal. I think it will do this no matter if you have the auto-on feature enabled or not.

If your subs are up near your mains, you should use 0 phase, in fact, in most situations it is recommended to use 0 phase even if subs are placed around the room, I would not really on bass tests.
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#259961 - 05/11/09 11:14 AM Re: EP-350 V3 warmup? [Re: SirQuack]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17755
Loc: NoVA
Hang on, hang on. This is at low volumes, correct? If you have the signal turned up when you turn on the receiver, does it still happen?

When you say a mechanical noise, if you stick your ear up next to it, does it sound like the signal's actually coming through, but it's several octaves too high and waaaaay too quiet?

How long does it take to go away?

I'm asking all this because I'll be shipping my EP350 back to Axiom shortly because of a problem like this (I don't think mine ever flips on if it's doing it, though), and I'd rather not waste their postage if it's normal!
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#259962 - 05/11/09 11:24 AM Re: EP-350 V3 warmup? [Re: SirQuack]
Lysol Offline
newbie

Registered: 05/11/09
Posts: 4
Thanks Sirquack

Thats what I fiqured.

As far as the phase goes, I found it hard to believe as well. I double checked with the battery test (I look for the first initial transient movement of the cone). In both cases positive terminal of the battery to positive terminal at the back of the amp (with phase at zero) yielded backwards transient of the cone. Vice-versa when reversed. I checked with 25, 31, 40, 50, 63, and 80 Hz tones. No question, bass is twice as loud and tight.

I think the drivers must be wired out of phase.

Boy, I do like these subs though.....I even find myself listening to hip-hop all of the sudden.

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#259963 - 05/11/09 11:29 AM Re: EP-350 V3 warmup? [Re: Ken.C]
Lysol Offline
newbie

Registered: 05/11/09
Posts: 4
Kcarlile,

I'm running the high-level (speaker-level) inputs from a tube integrated. There is enough current to wake up the subs (green light on), but it's as though it takes a minute or so to have the driver warm up. Its a faint "mechanical noise"....I assume to be voice coil hum.

Are you running a reciever with subouts? If so goose your output to the subs.

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#259966 - 05/11/09 11:34 AM Re: EP-350 V3 warmup? [Re: Lysol]
SirQuack Online   shocked
shareholder in the making

Registered: 01/29/04
Posts: 13325
Loc: Iowa
Ken, the sound sounds like R2D2 at a very low level and only last less than a second. It has been some time since I did any testing, but I was thinking I heard the noise the very first time I played anything, whether the Auto mode is on or off. Either way, I think the noise is normal and something internal waking up. I know Alan talked about a special/nifty little circuit built into these new 350's the gooses the performance and makes it Almost as good as a 500 in some respects. \:\)
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#260029 - 05/11/09 09:57 PM Re: EP-350 V3 warmup? [Re: SirQuack]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 17755
Loc: NoVA
OK, definitely different from what I'm hearing, then. Mine does come on instantly if the output volume is high enough... oh well, it's going back to its home for a little visit next week.
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#260037 - 05/11/09 10:18 PM Re: EP-350 V3 warmup? [Re: Ken.C]
fredk Offline
axiomite

Registered: 12/06/07
Posts: 7042
Loc: Canada
Mine just comes on. What am I doing wrong??
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#260273 - 05/14/09 02:55 AM Re: EP-350 V3 warmup? [Re: SirQuack]
Haoleb Offline
connoisseur

Registered: 09/25/02
Posts: 1488
Loc: Maine
 Originally Posted By: sirquack

If your subs are up near your mains, you should use 0 phase, in fact, in most situations it is recommended to use 0 phase even if subs are placed around the room, I would not really on bass tests.


I have to disagree with you here, I have a similar setup and notice a significant improvement with inverted polarity on my subs. If you cant hear a difference then you should probably leave the phase the same but theres certainly no reason to if you can hear a difference.
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#260306 - 05/14/09 10:36 AM Re: EP-350 V3 warmup? [Re: Haoleb]
pmbuko Offline
shareholder in the making

Registered: 04/02/03
Posts: 16268
Loc: Leesburg, Virginia
Agreed. The reason for the phase switch is so you can "sync up" the phase (peaks and troughs) of the sound in the overlapping range covered by both the sub and the mains near the crossover point. Put it where it sounds best if your sub isn't in the same general area as the mains.
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