FLX-E Operations Manual Rev F
Page 10
Table of Contents
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controller should connect to the transmit pin of the FLX-E, and similarly for the receive connection.
5.
Speaker connector(s)
– The number of speaker outputs depends on the FLX-E model. The FLX-E-80-4
has 4 output channels of 80W each. The FLX-E-160-2 models have 2 output channels at 160W each,
and the FLX-E-320-1 model has a single 320W output. Models with an “LZ” suffix are designed for 4-8Ω
speakers, while the models with a “CV” suffix are designed for high impedance speakers. Make certain
to check the power-handling capability of the speakers are appropriate. Excess power can damage
speakers. Stewart Audio suggests using the signal processing limiter block in the internal DSP (see
When connecting speakers, observe proper phasing to prevent a hollow sound resulting from
connecting speakers out of phase. When connecting speakers to a constant voltage (“CV” suffix)
model, make sure the total tapped power for each channel does not exceed the rated power for the
amplifier model being used. Stewart Audio recommends limiting the total tapped power to 75% of the
rated power for the model used. Also for constant voltage models, make speaker connections between
The sum of the tapped wattage for all speakers connected to a single output should not exceed the
rated output for the model used.
In normal operation, the DC voltage on the speaker output connectors is approximately 24VDC. Do
not connect any speaker output to ground or to the amplifier chassis. Do not connect speakers
across speaker outputs. (Bridge mode is not supported.)
6.
Power LED
– This blue LED illuminates whenever AC power is applied. A steady LED indicates normal
operation, while a flashing LED indicates that the amplifier is in an error condition. The identify
command will cause this LED to flash for several seconds. When new firmware is being installed, the
power LED also flashes.
6.1
Operation
6.1.1
Local and Network Audio
All FLX-E Series amplifiers have balanced connectors for 4 local inputs. The Dante™-enabled models use
Audinate’s multi-channel digital media networking technology, with near-zero latency and synchronization.
Routing audio signals from Dante-enabled transmitters to Dante-enabled receivers is accomplished via the
. Please visit their web site for detailed
information regarding this technology, system and network configuration, troubleshooting, and other
support. Note that all Dante-enabled FLX-E Series amplifiers support the AES67 standard.
To enable the
AES67 mode, click on the AES67 Config tab in the Device View in Dante Controller.
6.1.2
Remote Volume Control and Mute
By connecting an external 10KΩ potentiometer between the RVC, +10V and
GND pins as shown in the diagram to the right, the output level of all local
outputs can be trimmed over a 60+dB range. A contact closure mute pin is also
provided for muting all local outputs. Muting is accomplished by grounding the
MUTE pin. This is useful for fire alarm and emergency paging situations.
6.1.3
RS-232 Control
An RS–232 port (settings: 9600 baud; 8n 1) allows remote control of selected amplifier functions. Beginning
with firmware version 0.26, these commands operate on the signal before in DSP mixer to attenuate the
