What rating power transfomers are in the Mackie HR824s?

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midge

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Hi

I have just bought some secondhand HR824 monitors from the US (I am in Australia). To use the speakers here (when they arrive!), I will need to replace the 120v transfromers with 240v ones.

The price on the transformers from the local Mackie agent here is enourmous, so I was wondering if anyone knew what type of transformers they are and the output voltage (AC or DC and how much) and the current or the total power rating. If I can track some down cheaper, I'll use them, but only if they will be compatible.

Anyone got any info?

THANKS!

Shaun
 
Can't you just use voltage converters?

Check this out:

parts express

You probly just need to find out how much power those speakers draw and maybe you can find a similar product locally.
 
Hi

The Mackie Service Dept said I could use a voltage convertor, but there may be an induced hum (cause our power is 50, not 60Hz) that can be avoided by replacing the transformers with 240v 50Hz versions.

Anyway, I'm guessing that a voltage covertor that can handle the power of two speakers would be pretty pricey anyway!

Thanks

Shaun
 
Ah, I didn't know about the hum thing. Learn something new every day.

BTW the output power of the speakers in watts is a more than what they draw out of the wall, or the converter- it's not a straight watt/watt thing. You probably wouldn't need a really big converter. Those 824s draw 150w each out of the wall- and can put out 250w each.

Just curious- what is Mackie charging you for the xformers?

Oh- the transformers will have an A/C output- a transformer only passes A/C.

I wonder if Mackie wants to replace the whole power supply, cause the only reason I can think of for the hum is the rectifier- I don't think any xformer can change the A/C frequency.

Any tech-heads got an answer?
 
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the voltage convertor is a good option. one of my friends is using that to power his US purchase monitors as well.(together with his other US voltage stuffs, no problem) They are relatively cheap as well.

The 50Hz/60Hz hum can be a concern, but only if you are VERY unlucky. ;)
 
Hi

Thanks for helping people!

The mackie agent here is charging me $360AUS ($250US) for two transformers delivered to me.

Voltage converters are way cheaper per watt, so I think I will go that way. Mackie said it should be fine only there may be that induced hum, but I figure if the hum is really bad, I'll just pop the converter on Ebay!

If anyone knows the specs of the HR824 transformers, could you please let me know so that I may find a different (cheaper) source?

Thanks!

Shaun
 
Hum?

I see no reason why there would be any 50 hz hum if there is no 60 hz hum. Did they suggest that Mackie has some type of internal filtering at 60 hz?
8-)'
This hum, if it exists regardless of cycles (which the xformer passes to the secondary as an isolated a/c voltage at the same 50 cycles coming into the primary).

If there were noise, treat it the same way you would with our familiar 60 cycle hum.

The techie trick that I would be interested in is where the hell would you PUT the "new" transformer? The mackies plug into 110 with a "computer" type cord. If you stepped that up or down prior to the power coming into the system, why would the electronics act any different.

I'll be curious to hear the REAL answer (if we haven't already figured it out above). JD
 
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