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#1
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Help with fixing speaker system...
I have a speaker set, that says it needs 13.5V to run (13.5V DC IN, and
the big power brick thing says 13.5) - but my power brick is dead. I just hooked up a 12V power source, and the LED came on. So at least I know it's not my sub woofer (where all the speakers / volume control plugs in). Question is: can I run at 12v, just not as loud? Or will this blow something up, cause a fire, etc...? Or will it just cause damage over time? Or will it work FINE, with no major hazards, just not get as loud? Other numbers to consider: ORIGINAL HARDWA Input 120 VAC 60Hz 50W Output 13.5VDC 2.5A POSSIBLE REPLACEMENT Input 120V AC 60Hz 23W Output 12VDC 1000mA If it works, just not as loud, I'm set... I really don't want to spend more money on another powersupply. Thanks! Nu |
#2
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Help with fixing speaker system...
Abe wrote:
Depends on the electronics in the sub. Some electronics will not run when underpowered. -I guess my question is, if it DOES run, will I be hurting something? Or is that more of a case-by-case basis, too? Nu |
#4
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Help with fixing speaker system...
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#5
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Help with fixing speaker system...
You need to look at the acceptable voltage range for your speaker set. They
usually specify a "±". 12V may be acceptable. Typically I've seen 13+ VDC called out because of the use of a linear regulator. Typically at least a 0.7V margine is required to regulate to 12VDC (so input of greater than 12.7VDC). ....but again, check out the input DC requirement. Also note the power limitation on your PS: ORIGINAL HARDWA Input 120 VAC 60Hz 50W Output 13.5VDC 2.5A - 50W. .. actually more like 35W POSSIBLE REPLACEMENT Input 120V AC 60Hz 23W Output 12VDC 1000mA - 23W ... more like 15 W to your system. |
#6
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Help with fixing speaker system...
Your possible replacement supply does not have the required power for
proper operation, neither volts or what it realy needs amps-watts it will probably work at 1/2 volume or less and may damage the supply and the amp |
#7
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Help with fixing speaker system...
On 9 Jun 2006 21:57:57 -0700, wrote:
I have a speaker set, that says it needs 13.5V to run (13.5V DC IN, and the big power brick thing says 13.5) - but my power brick is dead. I just hooked up a 12V power source, and the LED came on. So at least I know it's not my sub woofer (where all the speakers / volume control plugs in). Question is: can I run at 12v, just not as loud? Or will this blow something up, cause a fire, etc...? Or will it just cause damage over time? Or will it work FINE, with no major hazards, just not get as loud? Other numbers to consider: ORIGINAL HARDWA Input 120 VAC 60Hz 50W Output 13.5VDC 2.5A POSSIBLE REPLACEMENT Input 120V AC 60Hz 23W Output 12VDC 1000mA If it works, just not as loud, I'm set... I really don't want to spend more money on another powersupply. Thanks! Nu Try measuring the output of the power supply. An unregulated 12v supply could be putting out 20v of more. If that 13.5 volt supply was unregulated, your speakers must be able to handle such things. However, the significantly lower current capacity may keep the speakers from working. It is unlikely that trying it will cause damage, but disconnect it if you hear strange sounds from the speakers. -- Mark Lloyd http://notstupid.laughingsquid.com "Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well armed lamb contesting the vote." - Benjamin Franklin |
#8
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Help with fixing speaker system...
wrote in message ups.com... Other numbers to consider: ORIGINAL HARDWA Input 120 VAC 60Hz 50W Output 13.5VDC 2.5A POSSIBLE REPLACEMENT Input 120V AC 60Hz 23W Output 12VDC 1000mA Your 'possible replacement' doesn't provide as much power. The voltage is not an issue (if you measured the original one when it was working, it was probably between 10 - 18 volts, "wall wart" transformers are usually way off), but the amperage probably will be. The original one put out 2.5 amps, the replacement puts out 1 amp (1000 mA). At low volume it may work fine, but when you crank it up, the replacement power supply will not be able to provide the amount of juice needed. |
#9
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Help with fixing speaker system...
On Sat, 10 Jun 2006 09:54:02 -0500, Mark Lloyd
wrote: On 9 Jun 2006 21:57:57 -0700, wrote: I have a speaker set, that says it needs 13.5V to run (13.5V DC IN, and the big power brick thing says 13.5) - but my power brick is dead. I just hooked up a 12V power source, and the LED came on. So at least I know it's not my sub woofer (where all the speakers / volume control plugs in). Question is: can I run at 12v, just not as loud? Or will this blow something up, cause a fire, etc...? Or will it just cause damage over time? Or will it work FINE, with no major hazards, just not get as loud? Other numbers to consider: ORIGINAL HARDWA Input 120 VAC 60Hz 50W Output 13.5VDC 2.5A POSSIBLE REPLACEMENT Input 120V AC 60Hz 23W Output 12VDC 1000mA As others said, the big problem is that the replacement only puts out 1 amp, which is why it only has 23 watts instead of 50. If it works, just not as loud, I'm set... I really don't want to spend more money on another powersupply. Thanks! Nu Try measuring the output of the power supply. Measure while it is in use, I think you mean. All wall warts and most other cheap PS's will be higher when not connected to the amp and when the amp is not turned on. An unregulated 12v supply could be putting out 20v of more. If that 13.5 volt supply was unregulated, your speakers must be able to handle such things. However, the significantly lower current capacity may keep the speakers from working. It is unlikely that trying it will cause damage, but disconnect it if you hear strange sounds from the speakers. Also someone mentioned PS failure from overheating. I think a) if the power supply fails, you probably won't have lost much, since this sounds like a spare, but for the first several long sessions you should put the PS where it can't start a fire. (at the end of an extension cord, so you can put it where you want it.) Better yet, if you touch the PS and it's no hotter than others that look like it (we're talking about a black cube that plugs into the wall, right) it's not likely to be overheating. I don't see why the amp would fail from low capacity in the power supply, especially if it sounds ok. |
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