User Guide

3
NQ-GAXMR1
The NQ-GAXMR1 Distributed Transformer provides impedance and voltage matching to allow a direct-drive (4- or
8-ohm) Power Amplier to drive a high-impedance distributed loudspeaker system at up to 40W using outputs of
either 25V or 70V. Note that only one output voltage can be used at a time.
The NQ-GAXMR1 allows ampliers without direct 25V or 70V output capability to drive distributed loudspeaker sys-
tems designed to operate at those voltages.
Output Connections
To drive distributed speaker systems designed to operate at
25V or 70V, connect your distributed loudspeaker system to
the output of the NQ-GAXMR1 transformer module. Connect
output wiring using the Phoenix input. Maintain proper polar-
ity (+/COM) on output connector. 25V or 70V can be selected,
depending on the distributed system. The NQ-GAXMR1 is
rated at a maximum of 40W RMS at 25V or 70V.
Input Connections
Connect your power amplier output to the NQ-GAXMR1
transformer input using the Phoenix connector, observing
proper polarity (+/COM) on input connector.
Use of a high-pass lter (aka a low-cut lter) set at a minimum
of 50 Hz is necessary when using the NQ-GAXMR1 trans-
former module to drive a 25V or 70V distributed loudspeaker
system to prevent distortion due to transformer saturation.
The input and output wirings are shown in Figure 1.
Specications
Power Rating: Maximum 40W
Input Voltage: 17.9 V
rms
max.
Input Current: 2.24 A
rms
max.
Output Tap 1 Voltage: 70.7 V
rms
Output Tap 1 Current: 566 mA
rms
Output Tap 2 Voltage: 25 V
rms
Output Tap 2 Current: 625 mA
rms
 FrequencyResponse: 50to15kHz+0/−3dB
THD: 0.02% 10W 50–20kHz
Size: 2.559” x 4.810” x 2.5”
Weight: 2.2 lbs
OUTPUT
COM 70V25V
INPUT
COM
+
Figure 1