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03-22-2011, 04:34 PM
|  | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | CarvinDCM1000L clipping/protect problem
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I got a rack set up with this power amp, BBE BMAX, an ART Power Conditioner and a Berringer compressor/limiter on top of an Acme Low B4 series II. Any time I attempt to slap or pop a note it will cut out the signal for three seconds on protect mode. I mean I can't even dig down, AT ALL! and it will cut out at any volume, I had the mod done to the BBE and it sounds good, it's just kinda a tease tho!! |
03-22-2011, 04:43 PM
| | Registered User | | Join Date: Feb 2004 Location: Bristol, Connecticut, USA | | | I don't know what is up with your rig but I will share a similar experience I had the other day. I was singing out of a pair of EV powered monitors in a garage and they kept cutting out and going into protect mode at a surprisingly low volume. It turned out to be a power supply issue. Once we shut down the heaters the setup returned to normal. So.............bad power = crappy performance in our case. |
03-22-2011, 04:51 PM
| | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | Interesting, well that could definitely could be the issue, we have to run a lead cord from the only "grounded" outlet in the house. I can't figure this thing out!!!! |
03-22-2011, 04:54 PM
| | Registered User | | Join Date: Feb 2004 Location: Bristol, Connecticut, USA | | | You should probably take your rig to another building to rule out this possiblility. |
03-22-2011, 04:56 PM
| | Registered User | | Join Date: Feb 2004 Location: Bristol, Connecticut, USA | | | Are your settings on the power amp correct? Are you in bridge mode and using the right cables / connections? |
03-22-2011, 05:02 PM
| | Registered User | | Join Date: Jan 2002 Location: Palm Coast, Florida | | | Gain staging done properly ?
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03-22-2011, 05:04 PM
| | Registered User | | Join Date: Jun 2009 Location: North Bend, WA | | Quote:
Originally Posted by MuzikMan  Are your settings on the power amp correct? Are you in bridge mode and using the right cables / connections? | Also maybe take everything out of your signal chain except bass-preamp-poweramp-cab. See if there is still an issue. My Carvin DCM has never given me any problems like this. Change out all cables one at a time if you have extras. |
03-22-2011, 05:29 PM
| | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | I'm using speakon for the cab/amp and monster cables/whirlwind for instrument cables. I'm having a music store look at it, I've tried different things and nothing seems to work. Bridged mode for sure! |
03-22-2011, 05:32 PM
| | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | I was told to use bOth channels max on the power amp and parallel mode. |
03-22-2011, 05:33 PM
| | Registered User | | Join Date: Feb 2004 Location: Bristol, Connecticut, USA | | In bridged mode you need a special Speakon cable. You can't use the regular ones that you use for stereo operation. I don't remember the specifics but one end must be wired differently.
Looks like I was wrong on this one! 
Last edited by MuzikMan : 03-22-2011 at 05:45 PM.
Reason: Bad information
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03-22-2011, 05:36 PM
| | Registered User | | Join Date: Jun 2009 Location: North Bend, WA | | Quote:
Originally Posted by MuzikMan In bridged mode you need a special Speakon cable. You can't use the regular ones that you use for stereo operation. I don't remember the specifics but one end must be wired differently. | I think GK amps are the only ones that need different cables. My Carvin I run bridged and use a normal speakon 2 conductor cable. |
03-22-2011, 05:39 PM
| | Registered User | | Join Date: Feb 2010 Location: Nude Zealand | | | Do you need to run bridged into a single cabinet? It may be doing you a favour and protecting your speakers.
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03-22-2011, 05:42 PM
| | Registered User | | Join Date: Feb 2004 Location: Bristol, Connecticut, USA | | Quote:
Originally Posted by cableguy I think GK amps are the only ones that need different cables. My Carvin I run bridged and use a normal speakon 2 conductor cable. | It looks like I was wrong. The manual makes no mention of a special cable for bridged mode.  http://www.carvinguitars.com/manuals...s-revA-web.pdf |
03-22-2011, 05:59 PM
| | Registered User | | Join Date: Dec 2003 Location: Kansas | | | If that is a class D amp, it might be low voltage causing your problem. We had that happen to a Peavey digital amp once at an outdoor gig running too many things off extention cords |
03-22-2011, 06:08 PM
| | Registered User | | Join Date: Jan 2002 Location: Palm Coast, Florida | | Quote:
Originally Posted by bassplayer347 If that is a class D amp, it might be low voltage causing your problem. We had that happen to a Peavey digital amp once at an outdoor gig running too many things off extention cords | Quote:
Originally Posted by AL!EN BA$$ Interesting, well that could definitely could be the issue, we have to run a lead cord from the only "grounded" outlet in the house. I can't figure this thing out!!!! |
Sounds like this is the issue......................
The amp is the "L" series, and the class D and SMPS tend to get flakey with "iffy" power.
Running one long extension cord to power everything sounds like the definition of flakey power to me !
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03-22-2011, 07:05 PM
| | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | Thanks alot guys. I'll have to try it on a good, actually grounded outlet! Should I try running it not bridged? |
03-22-2011, 07:15 PM
| | Registered User | | Join Date: Nov 2006 Location: Hudson Falls NY 12839 | | | Somebody else said something about gain staging? I don't know a great deal about it, just that your not supposed to crank it too high... |
03-22-2011, 07:24 PM
| | Registered User | | Join Date: Jan 2002 Location: Palm Coast, Florida | | Quote:
Originally Posted by AL!EN BA$$ Somebody else said something about gain staging? I don't know a great deal about it, just that your not supposed to crank it too high... | Make sure you are connected to good power first.
As far as "Gain Staging", you should not be overdriving the input of your amp - it will cause you to clip prematurely.
If you are playing, and noticing your clip lights coming on on your power amp, back off the output of your preamp.
If your power amp controls are wide open, you should have a hard time clipping it.
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Life is good as a "Bottom End" dweller
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03-22-2011, 08:13 PM
|  | Registered User | | Join Date: Nov 2008 Location: Sacramento CA | | | What is the Impedance of the cab that you are using?
You should check it with a Ohm meter.If Im correct you can only bridge those amps to 8 Ohms unlike the larger ones.
Last edited by FuzzBoxVoodoo : 03-22-2011 at 08:16 PM.
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03-23-2011, 08:42 AM
| | Registered User
Endorsing Artist: See profile | | Join Date: Feb 2005 Location: New York | | | Have you gotten the BBE back from the factory yet? Did the factory gain mod fix the problem?
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