Sound Performance Lab Model 2049 manual Connections, Analog XLR and RCA jacks

General Advices Connections

Again, while Kultube‘s housing is EMV-proof and protects against HF-interference, placement of the unit is very important since it amplifies microphone signals as well as other unwanted signals. Before connecting the Kultube or any other equipment turn off all power. Adjust the voltage setting on the back so that it corresponds with the power conditions.

The following graph shows the correct wiring for connecting unbalanced signals to the balanced XLR connectors:

		Input			Output
balanced		unbalanced		balanced		unbalanced
2	1	2	1	1	2	1	2
	3		3		3		3

1=GND

2=hot (+) 3=cold (-)

Alternatively unbalanced signals can be connected with mono Jack connec- tors to the balanced Jack sockets.

Sockets & Rear Switch

Analog XLR and RCA jacks

Connections

Symmetrical XLR and RCA jacks are used for analog in- and outputs. An analog mixing console is generally connected here (Insert Send/Return). Since the RCA and XLR jacks are wired in parallel, unbalanced operation of the RCA jack will have the same effect on the XLR jack and vice-versa. The Kultube is configured for a nominal level of +4dBu and can handle an input level of max. 25 dBu, with max. +23 dBu available on the output. It is recommended to drive the Kultube with a signal level of between 0 dBu and 12 dBu – this being the optimum drive range for signal processing in which also the signal-to-noise ratio is the best.

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