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Do U Pre or Post preamp from line out to board ?

#45
Downunderwonder said:
Get a speaker cable. You're carrying the full amp voltage on that instrument cable.
Click to expand...

That's exactly what I thought when I first became hip to this feature. But that is not the case, it is actually what the owners manual states. Thanks for looking out though. It's still a little weird looking when I go to set up.
Maybe just for some humor I might next time use a really short pedal (jumper) cable with a ninety degree jack, so the DI just hangs there 3 1/2 feet off the ground.
 
#47
I just got off the phone with Radial and they said that using a 1/4 inch instrument cable is fine. However if I was using the Active JDX I would want to use a 1/4 speaker cable. Either way I remember reading an older thread about this that Jimmy M had some knowledge on so to be safe I'm gonna hit him up for some of his wisdom.
 
#51
Aright sweet. Thanks for the help. Sorry belgabass if anything I have made it sound like a nightmare of a set up. It does sound good though. Thanks again downunderwonder.
 
#56
Yes, robustness was the only argument for a speaker cable I could think of, but electrically it is if anything a worse choice - my thinking is that a cable with higher capacity will allow more current through if there is a short or leak somewhere and thus fry things more easily. Not that I think it matters in reality, if the electronics are not protected against shorting they will probably fry regardless of cable type.

I'll go with what the manufacturer recommends and in this case they apparently said either cable will do the job.

Peace, out. :)
 
#57
After conversing with JimmyM, I'm gonna route this JDI as follows:
Speaker out via SPEAKER cable from SVT into JDI
Into 810 via SPEAKER cable
XLR out of DI to the board

Thus incorporating the entire amp (with power section)into direct signal.
Thanks again Downunderwonder for being so adamant. You more than likely saved my amp!
Thanks to JimmyM for getting me back on path too!
 
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#58
Downunderwonder said:
Owner's manual is wrong. 40 volts on a piddling instrument cable is bad news. You never dropped a spanner on a 12v battery?

And don't joke about hanging a DI off a pedal cable. Like you want to see your amp go up in smoke?
Click to expand...
The owners manual is right. Your spanner on a 12V battery goes up with a bang because there is zero resistance. Current flow is what does the damage and that is limited by the resistance in the circuit. Your DI will have a resistance that should be shown in the specs.
In this case it won't make a ton of difference what cable you use. The main reason for using an instrument cable would be for noise shielding. In this case the signal level is exceptionally high when compared to the level electrical noise that the cable might pick up. The main reason for using a speaker cable would be for current capacity. The resistance of the DI will guarantee that there isn't much current in the circuit. I would suggest that you don't hang the DI off the back of your cabinet with a jumper cable but only because that is pretty hard on the cable and connectors. It's always bad to lose your signal mid show because your cable is busted.
 
#60
frnjplayer said:
The owners manual is right. Your spanner on a 12V battery goes up with a bang because there is zero resistance. Current flow is what does the damage and that is limited by the resistance in the circuit. Your DI will have a resistance that should be shown in the specs.
In this case it won't make a ton of difference what cable you use. The main reason for using an instrument cable would be for noise shielding. In this case the signal level is exceptionally high when compared to the level electrical noise that the cable might pick up. The main reason for using a speaker cable would be for current capacity. The resistance of the DI will guarantee that there isn't much current in the circuit. I would suggest that you don't hang the DI off the back of your cabinet with a jumper cable but only because that is pretty hard on the cable and connectors. It's always bad to lose your signal mid show because your cable is busted.
Click to expand...
I was referring to a shorting failure of the cable. This would cause the amp to go bang.
 

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