Knoll US4 Installation Instructions Download Page 1

Component Balun Specifications: 

Models and Dimensions 

US4-Hub: 16-3/4 x 1-3/4 x 11-1/2” (425 x 45 x 292 mm) 

 

Quad Receive Modules

 

UDR-Quad (in-wall Decora™ version): 4.1"h x 1.4" w x 2.0"d. 
UR-Quad (black enclosure): 1.1"h x 2.6"w x 2.8"d (28 x 66 x 71 mm). 

Video Bandwidth: 

450 MHz @ -3 dB. 

S/PDIF Input and Output: 

0.5 V to 2 V RMS. 

Video Input and Output

: 0.5 V to 2 V RMS. 

Input and Outputs

Quad Receive Modules: four gold RCA input jacks, one RJ-45 

out-jack, one-DC power input. 

 

US4-Hub: Four RCA input jacks, six RJ-45 output jacks, one DC 

power input, one input and one output link RJ45 jack. 

Power

 

Receive Unit: 12 VDC 40mA. 

US4-Hub: 15 VDC (one PS1506 included). 

 

Warranty

 

 

Knoll Systems warrants its products sold in the USA and Canada by authorized 
Knoll dealers to be free of defects in materials and workmanship. This warranty 
extends for three full years from the date of purchase by the original consumer. 
Any products returned to Knoll Systems and found to be defective by Knoll 
Systems within the warranty period will be repaired or replaced at Knoll Systems 
option, at no charge. Knoll Systems will not be responsible for the actual cost of 
installation or removal of the product, nor for any incidental or consequential 
damages. Some states do not allow the exclusion or limitation of incidental or 
consequential damages, so the above limitation may not apply to you.  This 
warranty gives you specific legal rights.  You may have additional legal rights 
that vary from state to state. 

 

 

Knoll Systems www.knollsystems.com   

145 Tyee Drive, Point Roberts, WA 98281 
12140 Horseshoe Way, Richmond BC V7A 4V4 

tel (604) 272 4555, fax (604) 272 5595 

Made in Canada   Knoll Systems All Rights Reserved 

US4-HUB  
Installation  
Instructions 

 

Warning

: To be installed and/or used in 

accordance with appropriate electrical 

codes and regulations.

 

If you are not 

sure about any part of these 

instructions, consult a qualified electrician. 

 

Introduction:

 Thank you for your purchase of a Knoll active 

balun system. This system is specifically designed to send a 
three wire Pb, Pr, Y component or RGB and Digital Audio or 

S/PDIF (Dolby® digital or DTS®) signals safely down a single 
cat 5 or cat 5e wire up to 500 feet (250 feet for 1080p) without 

encountering signal degradation problems. Balun is an acronym 
for:  

 

BAL

ance – 

UN

balance 

 
The hub is a send module and takes a conventional component 
signal and balances it (signal is not tied to a ground reference) 

then sends it via cat 5 to a receive module. The receive module 
unbalances the component signal back to its former state. This 

process does not allow any stray magnetism of any sort to 
contaminate the signal while it is being transported. 

 
This US4-Hub requires up to six Knoll US Quad receive modules 

(enclosure or decora in-wall style) to operate. Each quad receive 
unit also requires a PS1202 power supply. 

 

Features: 

  

• 

Stackable 17” enclosure. 

 

• 

Will safely send 480i/p, 720p and 1080i/p signals.  

 

• 

Power supply included. 

 

• 

Mix and match decora style and tabletop style quad 

receive modules. 

 

 

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