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Speakon cables , Neutrik vs nonbranded

Hi all, IV recently bought a AG700 and have just started "hearing" weird distortion tones. IV ordered 2 Neutrik cables, , but I had an unbranded speakon to jack which IV been using.
I keep noticing "weird" top end fiz , that comes and goes.and gain seems to vary ??. IV swapped instrument leads, changed 9vpower adaptor for pedals, removed pedals, even started wondering if the P U in my bass is playing up..?? Then I thought I may have heard unbranded speakon leads can b "dicky"?? Can I damage the head using unbranded speakon? Any ideas?
Like I mentioned, I will be receiving 2 new Neutrik cables in 3 or 4 days, should I cease until then? I usually play 1 to 2 hrs daily..
 
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Ok, tech has given AG clean bill of health.. it outputs 600 watts into 8ohms ! Way over it's stated, very conservative 350 into 8 ohms. Tech mentioned that US made amps give a rating with amp given 110 v .., in Australia we run 240v , and apparently, that can effect the output RMS. ..
IV received new Neutrik speakon cables, and "all is good".
WARNING TO ALL.. nonbranded speakon leads aren't worth the game, I was using nonbranded for 1 week, 2 hrs daily at home, and 1 X 3 hr show "at volume" .By day 7 , the amp was starting to do Allsorts of "weird" stuff, top end fizz(distortion), volume varying, etc ...
All well that ends well.
Big thanks to those who commented, Talkbass is brilliant!!
 
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Tech mentioned that US made amps give a rating with amp given 110 v .., in Australia we run 240v , and apparently, that can effect the output RMS.
Your tech is an idiot as the secondary voltages, which is what the actual amp modules run on, will be the same irrespective of the primary voltage - this is what the mains transformer actually does. Also, very, very few techs have a set up capable of taking many hundreds of watts loaded correctly, and having designed a lot of amps, one suddenly making much more than rated is far more likely to be a measurement error than an actual power output.
I have never seen an amp with a selectable primary voltage make any sort of difference to rated output.
 
The tech might have been measuring the power with a purely resistive load that would react different then a speakers inductive load.
We do not know what the tech measured the power with or what the load or resistance was he was using.
The amp is rated for 700 watts at 4 ohm so his test load might be less then 8 ohms.
The main thing is that you're happy with it.
Cheers
Mick
 
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