User manual
QTA 6000 Series 
User Manual
User Manual
Q-Tech Commercial Series
QTA 6060M/6120M/6250M 
9
1 2 3 4 5 6 7 8
Input 6 Input 5 Input 4 Input 3 Input 2 Input 1 Phantom VCA
Sens
100mV Line Line Line Line
Tel/
Line
off Master
300mV Mic Mic Mic Mic Mic on Input 6
29. Bridge Select
  The “Bridge Select (Sel)” terminals are the 
access point to activate the “Bridge In / Out” 
feature. To activate the feature connect the two 
points together via an external contact closure. 
These two points must be connected to send 
or receive any signal. By connecting the Bridge 
In / Out terminals of the Mixer amp, a simple 
room combining system can be accomplished. 
If using a remote switch and closing it, the 
“Bridge Select (Sel)” will combine the amps 
as one, opening the switch will separate the 
amps.
  Note: If combining 3 or 4 Mixer amps 
together the output level will have to be 
adjusted before and after Bridge Sel terminals 
are connected (shorted) together. We suggest 
utilizing the Remote Level control when using 
this feature.
30. BRIDGE IN/OUT
  Certain installations have the need to combine 
one or more Mixer amps together. These Mixer 
amps may operate different rooms of an install 
but have the need to share a page or music 
throughout the installation. These terminals 
provide a way to send and receive balanced 
line level signals from the internal mix bus of 
the Mixer amp. The “BRIDGE IN / OUT” feature 
is PRE Tone Controls and Low Cut Filter The 
Bridge In/Out feature allows you to send and 
receive a balanced signal. This is important for 
allowing longer distances between the mixers. 
  Note: This function should only be used with 
other Quest Sound mixers that have this 
feature. The Send and Receive signals are 
combined through the same terminals. To 
activate this feature, see number 19 Bridge 
Select
31. SPEAKER TERMINALS
  For loudspeaker connections, connect using 
the following information or proceed to the 
setup section for typical wiring diagrams.
  COM - Speaker common or negative 
connection. 4 - Connect to direct coupled 
loudspeakers.
  70V - Connect to transformer coupled, 70.7V 
loudspeakers with a total load impedance of 
no less than 41.6.
  100V - Connect to transformer coupled, 100V 
loudspeakers with a total load impedance of 
no less than 83Ω
32. 24V DC interface










