Line Array User’s Manual
14
SYSTEM SETUP: ELECTRONICS
STLA Self-Powered Systems
STLA line array modules are self-powered with the PM-3 PowerNet Tri-Amplifier. The Class D amplifier section
and the Loudspeaker Specific Processing electronics require appropriate AC power. Audio inputs can be either
high-CMRR analog audio inputs with XLR looping connectors or CobraNet digital audio inputs. If a R-Control
remote control and supervision network is installed, its connections can be made via a separate twisted
pair cable
and Phoenix connector or in systems having CobraNet, with the CobraNet connectors.
Source Signal
Source signal connections to aself-powered STLA array are quite straightforward. Connecting analog signal simply
requires one cable from the top module to the snake. Subsequent modules can then be connected using the PM-
3’s looping XLR inputs and outputs. Of course, if you intend to use level shading as part of your array design, you
will need to attenuate the inputs to all modules that receive different signal levels.
STXLA Externally-Powered Systems
STX Amplifier Selection
STXLA array modules are tri-amplified. For optimum performance we recommend the X14 Controller
and the following power amplifier ratings:
LF
1,000 to 2,000 watts, RMS @ 4 ohms
MF
400 to 800 watts, RMS @ 4 ohms
HF
160 to 320 watts, RMS @ 4 ohms
All amplifiers must have the same voltage gain.
Stereo
Amplifier
CH 1
CH 2
CH 1
CH 2
Stereo
Amplifier
CH 1
CH 2
SENSE CONNECTIONS, NOT
SHOWN FOR CLARITY, MUST BE
CONNECTED AS SHOWN IN
X14A MANUAL. .
AMPLIFIER RACK
LOW - OUT - HIGH
INPUT
X14A
SUB - OUT - MID
MINIMUM LOAD IMPEDANCES:
1 x STXLA/9 = 8 OHMS/CHANNEL
2 x STXLA/9 = 4 OHMS/CHANNEL
3 x STXLA/9 = 2.7 OHMS/CHANNEL
4 x STXLA/9 = 2 OHMS/CHANNEL
EIGHT CONDUCTOR
LOOPING CABLE,
SUPPLIED BY
RENKUS-HEINZ
SPEAKON PIN OUT:
1+,1-, LF 1, 8 OHM
2+,2-, LF2, 8 OHM
3+,3, MF, 16 OHM
4+, 4-, HF, 16 OHM
IMPORTANT NOTE:
AMPLIFIER GAINS MUST
BE SET THE SAME.
0
10
0
10
0
10
0
10
OUT
0
10
0
10
INPUT
LOOP
OUT
CH 1
OUT
0
10
0
10
CH 2
INPUT
LOOP
OUT
HIGH FREQUENCIES 4+, 4-
MID FREQUENCIES 3+, 3-
LOW FREQUENCIES 2+, 2-
LOW FREQUENCIES 1+, 1-
OUT TO OPTIONAL
SUBWOOFER AMP.
MF OUTPUT
HF OUTPUT
LF OUTPUT
EIGHT CONDUCTOR CABLE
