Greetings all
I'm trying to pick the best way to hook up the ZR1600 with the above preamp. I have 2 choices in mind. Also I want to use an unbalanced coax cable (Belden teflon) between the preamp and the ZR1600.
Note- in following discussion pin 2 is plus, pin 3 is minus and pin 1 is ground for the balanced ins and outs.
It might help to sketch out these scenarios to visualize.
Scenario A
1. Unbalanced source to NHT Balanced Preamp --
Source hot lead to pin 2
Source ground to pin 1
2. NHT Preamp output to ZR1600 --
Preamp output pin 2 (coax center lead) to pin 2 of ZR1600.
Preamp output pin 1 (coax shield) to pin 3 of ZR1600.
Pins not used = Input pin 3 of preamp, output pin 3 of preamp, input pin 1 (ground) of ZR1600. ZR1600 ground lift switch set to lifted.
Scenario B
1. Unbalanced source to NHT Balanced Preamp --
Source hot lead to pin 2
Source ground lead to pin 3
2. NHT Preamp output to ZR1600 --
Preamp output pin 2 (coax center lead) to ZR1600 pin 2
Preamp output pin 3 (coax shield) to ZR1600 pin 3
Pins not used = preamp ground pin 1, ZR1600 ground pin 1. ZR1600 ground lift switch set to lifted.
Note that both of the above scenarios drive the full balanced input of the ZR1600. I have seen some schematics where they short pins 1 to 3 on a balanced input and connect those to the source ground. I don't know which is the better method.
Let me know of the above two methods which should theoretically work the best. I know I really should go balanced all the way but my source is unbalanced and I want to use the passive preamp, not an active one.
tyee
