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Old 19th June 2013, 04:32 PM   #11
DF96 is offline DF96  England
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Perhaps you should ask Bryston why their preamp appears not to be able to meet its spec. 30ft of cable could give a capacitance of 1nF. Probably a bit high for many preamps, but Bryston claim theirs can drive 600 ohms. 1nF at 20kHz is 8k reactance, so small by comparison. Perhaps their output stage can't cope with a capacitive load and is verging on instability?
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Old 19th June 2013, 04:41 PM   #12
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I lost track. Is this an unbalanced or balanced system?
If it's balanced, are the 3 inputs identical?
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Old 19th June 2013, 04:53 PM   #13
SashaV is offline SashaV  Canada
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It is balanced and 3 inputs are identical (6B SST).
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Old 19th June 2013, 04:59 PM   #14
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This is a 10 year old paper by Jim Brown on balanced splitters.

'Mic Splitters'
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Old 10th July 2013, 01:40 PM   #15
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We have tons of WSW 811453C (Siemens IA) modules, I would like to use some of them for splitting line and maybe instrument signals. Anyone knows output impedance?
I am sure they can drive 600 Ohms, they where also used for exactly this purpose in the internal distribution system of the ORF (Austrian Broadcasting), as far as I know.
But that seemed to have included an additional resistor network. I don't know if this makes sense.
I hope there is a way to get this to work without too much complication...
Interesting topic for studio owners!
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