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ESI 

uniK 04

 

 

7

1. TRS input (Left / Right)

 – these jacks accept TRS input connections, either balanced or 

unbalanced. For balanced connections, a 3-conductor TRS plug is necessary. The TRS input is 
wired like this: 

INPUT SIGNAL 

TRS CONNECTIONS 

+ Tip 

- Ring 

Shield Sleeve 

 

 

Unbalanced wiring works with either a 2- or 3-conductor TRS connector. A 2-conductor TRS plug 
(or sometimes also just called TS plug) automatically grounds the minus signal input, whereas a 3-
conductor TRS plug wired unbalanced provides the option of leaving the minus open or grounded. 
We recommend that you ground the unused input. 

2. vent port

 – uniK 04 is a vented box speaker system with a vent port on the rear panel. Make sure 

you are not blocking the vent port (i.e. by putting the speaker too close to a wall) or the sound 
colour will be changed. 

3. speaker wire connection

 – use these connectors to connect the included speaker wire with the 

second passive uniK 04 speaker. 

4. power switch 

– when you push the power switch, uniK 04 will be turned on, and 

–surprise– it will be turned off when you push the power switch again. 

5. power port with ext. fuse

 – use this connector to plug in the detachable 3-circuit line cord that 

connects to the power outlet. The connector contains a replaceable fuse (T1AL/250V). 

Front Panel 

 

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