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+4dBU Balanced line output to unbalanced instrument line input?
Old 16th June 2013
  #1
Gear Head
 

+4dBU Balanced line output to unbalanced instrument line input?

Hello, I would like to know what the best option (devices to use,etc...)while maintaining high quality clean signal?
Old 16th June 2013
  #2
Lives for gear
 
Wyllys's Avatar
 

Out of what into what?
Old 16th June 2013
  #3
Lives for gear
 
scrubs's Avatar
 

Sounds like you may be looking for a reamp device. Check out the Radial ProRMP.
Old 16th June 2013
  #4
Gear Head
 

Anything with those specifications.... I'm trying to figure out effective ways to convert the signal and match the impedance between the two without loading (distortion). your suggestion will be greatly appreciated. Thank you in advance.
Old 16th June 2013
  #5
Gear Head
 

hey, scrubs thank you for you response. yeah I've go my eye on the radial reamp jcr but im wondering about other methods/techniques that can achieve this as well and if any body else have tried this before.
Old 16th June 2013
  #6
Gear Head
 

I'm trying to go from a trs balanced line out (1.7k ohms 24dbu max) to an unbalanced 1/4" instrument input (140k ohms +18db @ 20 Hz max) with a pad -15 db. i don't want to add noise or distort i want a clean signal in the best way possible. im worried about the 24dbu max going into +18db @20 Hz. suggestions/guidance will be a great help. thanx
Old 16th June 2013
  #7
A transformer coupled reamp box will certainly work and the transformer and ground lift will add little coloration and eliminate the possibility of a ground loop if needed.

However, if you can solder, you can construct and try a passive balanced to unbalanced attenuator that will properly drive your instrument input. This circuit will present a 2.2 k Load to your balanced output and will attenuate the signal 19.1 dB so won't have any possibility of overloading the instrument input.

Using good 1/4 watt metal film resistors will result in lower noise and lower distortion than any transformer-coupled re-amp box. The attenuator should be constructed in a metal box (for shielding) that is connected to the sleeve of the output TS connector. It might even be possible to build it into a (larger) metal TS plug shell like those on older Switchcraft TS plugs.

If both the device providing the balanced output and the instrument amplifier are powered from the same AC line source, you should not have any ground loop noise issues. If you do, then a transformer coupled/ground lift device is needed.
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+4dBU Balanced line output to unbalanced instrument line input?-bal-unbalanced-attenuator.jpg  
Old 16th June 2013
  #8
Gear Head
 
pugsly's Avatar
Will just be really hot...shouldn't be a problem if you've got the -15db pad. Just keep your levels low at the source and you might not even new the pad.
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