AMPLIFIER OPERATION AND MAINTENANCE
AMPLIFIER OPERATION AND MAINTENANCE
Before you begin:
Ensure that the amp is plugged into a 15 Amp power socket. At full power the amp will require in excess of 10 Amps.
Ensure the amp has air clearance with nothing covering the ventilation slots. 6 inches of clearance is recommended, or, if
rack mounted, please use a cooling fan.
Double-check all connections from connected processors or AVR ’s, and connections to speakers. Make sure all
connections are good and that there are no stray wires, or strands of wire.
Tip - If speaker wires are running through walls or ceiling, you can check that the speaker wires are connected correctly
by taking a 9V battery and momentarily touching the speaker wire to the + and – terminals. If the speakers are connected
there will be a small ‘popping’ sound. Turn the volume level of the connected Processor or AVR down to zero for all
channels.
Power-on - Normal Operation
Press the front panel power button. After a short pause the front panel LED indicators will light-up.
Power:
Blue Lights – The amp is on and working correctly
Standby:
Yellow/Orange light – The amp is in standby mode, no signal to speakers, no sound.
Protection:
Red Light – The amp has automatically detected a problem and is in protection mode to prevent damage to speakers.
Turn amp off, unplug
and check speaker connections for short circuits (positive and negative wires touching).
Power-on - auto signal detecting mode
Press the front panel power button. After a short pause the front panel LED indicators will light-up.
When the rear panel switch is set to SIGNAL the front panel indicator lights will be Yellow/Orange if there is no signal from
the connected Processor or AVR. When a signal from any channel is present the indicator lights for that channel will turn
to Blue and the speaker will play that signal.
Power-on – Trigger
Press the front panel power button. After a short pause the front panel LED indicators will light-up.
When the rear panel switch is set to TRIGGER the front panel indicator lights will be Yellow/Orange and the amp will be
in Standby mode. When a TRIGGER signal is present the amp will turn on and the indicator lights will be Blue. The amp
will stay on as long as there is a TRIGGER signal present. When the TRIGGER signal is removed, the amp will return to
Standby and the front panel indicator lights will go to Yellow/Orange.
To turn Off
Press the power button on the front panel, all lights will turn off.
Maintenance
If the amp requires cleaning, wipe with a clean, dampened soft cloth. Wipe dry immediately with a dry cloth. NEVER use
benzene, thinner, alcohol or any other volatile cleaning agents. Do not use abrasive cleaners, as they may damage the
paint. Do not expose the amp to insecticide, waxes, polishing agents, or an aerosol spray as moisture may enter the amp.
Service Information
Should you encounter any problems with your XA amplifier please reset the power by switching off and un-plugging
the amp. Re-check all connections from Processors or AVR’s and to the speakers. Turn on the amp again and refer to
the ‘Amplifier Operation and Maintenance’ instructions. If a problem still exists, contact OSD Nero’s customer service
department at OSDAUDIO.COM.
Individual channel, power status indicators
Front Panel Status LEDs
Power: Bright Blue
Standby: Yellow
Protection: Red
Number of Output Devices:
5 per channel
Power Bandwidth:
5Hz - 54kHz +0/-3 dB
Filter Capacitance:
Four 6800μF Caps per channel
Crosstalk:
Greater than -70dB from 20Hz –20kHz
Gain:
Voltage gain of 29dB
Input Impedance:
40k ohms
Input Sensitivity:
1.00 Volt
Remote Trigger Voltage:
8 - 24 Volts DC at 5 milliamperes or greater
Dimensions:
including feet (HxWxD) 6.0” x 17.0” x 16.75”
Weight:
65lbs
Power Requirements:
120VAC, ±3%, - 60Hz 1500 watts maximum
XA7180
AMP 1
AMP 2
AMP 3
AMP 4
AMP 5
AMP 6
AMP 7
OUTPUT POWER (RMS) (UNIT:W) @1% THD (SINGLE CHANNEL) 4 Ohms
300
300
300
300
300
300
300
OUTPUT POWER (RMS) (UNIT:W),@5% THD (SINGLE CHANNEL) 4 Ohms
335
335
335
335
335
335
335
OUTPUT POWER (RMS) (UNIT:W) @1% THD (SINGLE CHANNEL)
8 Ohms
180
180
180
180
180
180
180
ALL CHANNEL OUTPUT POWER (RMS) (UNIT:W) @0.1% THD
8 Ohms
122
122
122
122
122
122
122
ALL CHANNEL OUTPUT POWER (RMS) (UNIT:W) @1% THD
8 Ohms
130
130
130
130
130
130
130
THD @1W (UNIT:%) (SINGLE CHANNEL)
8 Ohms
0.03%
0.03%
0.03%
0.03%
0.03%
0.03%
0.03%
THD @RATED POWER (UNIT:%) (SINGLE CHANNEL) 130W
8 Ohms
0.025%
0.025%
0.025%
0.025%
0.025%
0.025%
0.025%
THD @1W (UNIT:%) (SINGLE CHANNEL)
4 Ohms
0.05%
0.05%
0.05%
0.05%
0.05%
0.05%
0.05%
THD @RATED POWER (UNIT:%) (SINGLE CHANNEL) @250W
4 Ohms
0.03%
0.03%
0.03%
0.03%
0.03%
0.03%
0.03%
FREQUENCY RESPONSE @-3dB - Hz
1W
7.5HZ-80K
7.5HZ-80K
7.5HZ-80K 7.5HZ-80K
7.5HZ-80K
7.5HZ-80K
7.5HZ-80K
Rated power
7.5HZ-80K
7.5HZ-80K
7.5HZ-80K 7.5HZ-80K
7.5HZ-80K
7.5HZ-80K
7.5HZ-80K
SIGNAL TO NOISE (A weighted) (UNIT:dB) Stereo mode, 1K/100Hz
@1% THD, XLR input
8 Ohms
104
104
104
104
104
104
104
DAMPING FACTOR rated power
1 KHz
150
150
150
150
150
150
150
IDLE CURRENT - Amps
0.29
MAX.CURRENT @ALL CH. At rated power - Amps
10.7
EFFICIENCY OF AMPLIFIER - %
66%
Performance Specs
General Specs
NERO XA7180 man.indd 6-7
7/28/22 3:06 PM
