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I'm sorry I listened.....

#102
UncleFluffy said:
I was only thinking of the input voltage/current relationship at the PSU stage - linear is roughly proportional, switcher is inverse, correct? Hadn't thought about downstream from there.

Thanks. Once again I learned something today :)
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Both are proportional, EXCEPT specific switcher designs that are REGULATED. In that case the current will increase as the PWM duty cycle corrects for the lower voltage.
 
#104
What's bad is it happened twice....hmmmm. Sounds like Carvin has some redesigning to do. On the other hand I have always liked Peavey for bass rigs. I buy what I can afford and produces the sound I am looking for. Peavey has always been able to do that for me.
 
#106
UncleFluffy said:
Yes, 8/4 ohms bridged or 8/4/2 per channel dual mono.
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Well, that's what they say. There was a Carvin bass head where my one band practices, they told me to go ahead and use it. It would cut out after a while running bridged at 4 ohm loads. It was also rated for 4 ohm bridged operation....

They said it would run under a 4 ohm load. They just don't say how LONG it will run under that load.... :D

Randy
 
#107
KeithAlanK said:
The odds of 2 brand new amps overheating without some kind of external cause are beyond statistical analysis.
It's either your cab or your speaker cable.
Don't blame Carvin.
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um, I think your math is off. Statistically it's far more likely to have two amps with the same problem than two amps with two different problems. That's why cars get re-called for a the SAME problem occurring in a number of vehicles. There could quite easily be an issue with a batch of components that were out of spec and it didn't get picked up in the factory. That's the basic reason behind recalls.
 
#110
Although I never run my Carvin R1000...predecessor to the BX1200...in bridged mode (I run 4 ohm cabinets, at least 2 of them, at all times) I have driven the amp @ 2 ohms, using 4 (4 ohm) speakers. In fact, I do this whenever our band practices. Although it gets warm (not hot) it has never had a problem with cutting out or shutting down.

This may or may not be the case with the BX series heads, but the R series Carvins are very sensitive to lower voltages, and low voltage WILL cause them to quit. This has been discussed at length over at the Carvin forums, and I've seen it happen myself. This is 1 issue never discussed regarding to the OP's situation. If he was using his 'new BX1200's with less-than-optimal voltage supplied, it might explain the problems he had with both of his amps.
 
#111
I have an Alesis power conditioner with a volt meter on it, who's to say how accurate it is, but I've had it for quite some time and used it on a holy crap load of stages and its always seemed to do its job. Showed me 116 and 117 before and I've switched outlets on stage to better power, closer to 119 and 120. Anyways.....In the jam space, it always says 119-120....So, I'm pretty sure I'm getting good power.



Either way, I spoke with Bart today and I've gotta say their being more than gracious, and for that, I give them credit atleast. He sent and e-mail over to the engineering lab and they're going to talk it over and he's going to find out if they tested the one I sent back or if they have any clues as to why this is happening. He said, if all else fails, He'll set me up with a BX1500 or B2000 if I'm willing to give it another chance. If not, he'd gladly refund my money. But because they're being so good about this, I think I might be willing to give them one more shot. I'm leaning towards the B2000, just to get away from the whole, bridging/mono block/ each amp at 2 ohms thing. Seems like the power situation might be better with the B2000. We'll see.

+1 for Carvin customer service, atleast.
 
#113
If you're looking to output massive amounts of power like 1200 or 1500 watts at 4 ohms, and NOT going Stereo, I'd definitely go with the B2000 instead. At least with that one, you won't be pushing it to its limitations and boder on melt-down...

Give it a shot, what do you ahve to lose?
and good luck with the next one!
 
#114
ShawnStones said:
Either way, I spoke with Bart today and I've gotta say their being more than gracious, and for that, I give them credit atleast. He sent and e-mail over to the engineering lab and they're going to talk it over and he's going to find out if they tested the one I sent back or if they have any clues as to why this is happening. He said, if all else fails, He'll set me up with a BX1500 or B2000 if I'm willing to give it another chance. If not, he'd gladly refund my money. But because they're being so good about this, I think I might be willing to give them one more shot. I'm leaning towards the B2000, just to get away from the whole, bridging/mono block/ each amp at 2 ohms thing. Seems like the power situation might be better with the B2000. We'll see.

+1 for Carvin customer service, atleast.
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Yes, +1 for Carvin CS.
B2000 would be more suited to your power situation it seems. As the RR412 won't be running near the amp's limitation. Plz keep us posted. :bassist:
 
#116
ShawnStones said:
I have an Alesis power conditioner with a volt meter on it, who's to say how accurate it is, but I've had it for quite some time and used it on a holy crap load of stages and its always seemed to do its job. Showed me 116 and 117 before and I've switched outlets on stage to better power, closer to 119 and 120. Anyways.....In the jam space, it always says 119-120....So, I'm pretty sure I'm getting good power.



Either way, I spoke with Bart today and I've gotta say their being more than gracious, and for that, I give them credit atleast. He sent and e-mail over to the engineering lab and they're going to talk it over and he's going to find out if they tested the one I sent back or if they have any clues as to why this is happening. He said, if all else fails, He'll set me up with a BX1500 or B2000 if I'm willing to give it another chance. If not, he'd gladly refund my money. But because they're being so good about this, I think I might be willing to give them one more shot. I'm leaning towards the B2000, just to get away from the whole, bridging/mono block/ each amp at 2 ohms thing. Seems like the power situation might be better with the B2000. We'll see.

+1 for Carvin customer service, atleast.
Click to expand...

The B2000 is really all about extra wattage if you need headroom. I really hope this works out for you and Carvin this time.;)
 

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