Phone: +1 (949) 654-2047
Address: Irvine, CA, USA
Document name: AMP-1002 quick start guide
Revision: 1.05
Date: 7/31/2020
US and PCT patents pending
Specifications are subject to change without notice
right input with a multi-meter and make sure they are not connected (shorted) together as ground inside
the subwoofer.
Shorting any of the 4 speaker pins together or to ground could cause permanent
damages to the product and void the warranty.
Ceiling speaker wiring
: This power amp can drive up to 8 pcs of 8-ohm
ceiling speakers. Please see the diagram in the right side on how to wire
the speakers.
How to set Line Gain:
Connect the most used audio source to one of this
power amp’s inputs. If there’s a volume control on that source device (like
a laptop, smartphone, projector or TV with headphone output jack), first
set its volume to a proper level that’s not too low to have noise or too high
to have clipping. Refer to the its user manual or found the best setting by
experiment. Normally laptop or smartphone volume should be around
80%, TV or projector’s headphone output volume should be aground 50%.
Then first set the Line Gain to min position, turn this power amp’s volume
control to max position, power up the system, then gradually increase the
Line Gain until the distortion start to be heard, then back off a bit to
remove the distortion. The Line Gain is properly set now. No matter how
volume is set from here on, the power amp won’t clip.
How to set Mic Gain:
Mic signal level is not affected by Volume control.
First turn the Mic Gain pot to the min position. Play the music, set the volume to normal operation level,
and then gradually increase the Mic Gain until the speaker to mic feedback just occurs. Back off the
Mic Gain a bit to eliminate the feedback, and walk with the mic around the normal area when the
presenter could walk to, and make sure no feedback from anywhere in that area. The Mic Gain is
properly set now. No matter how volume is set from here on, the feedback won’t happen.
Protections and indications:
This power amp has built in over or under voltage, reverse polarity,
overheat, over power, DC in output and short protections. When the protection happens, the power
amp will shut down immediately, and try to restart a few seconds later to see if the protection condition
still exists. During this time, the front panel LED is either lit in red color or not lit at all depending on the
type of protection condition. When protection happens, please turn off the main power immediately and
troubleshoot and correct the conditions that caused the protection.
Heat dissipation:
This power amp has the cutting edge highest efficiency Class D circuit with less heat
generation than the traditional Class D power amps, and much less than the Class A, AB power amps.
Also the heat is designed to be coupled directly to the metal enclosure instead of thru the air ventilation.
For the heat to dissipate from the enclosure, it’s recommended to either mount the power amp onto to a
metal surface (like a rack shelf) or to an area with some air circulations.
*Max output powers, signal types and power adaptors:
This power amp will output the typical RMS
power listed in the specs continuously with a sinewave signal on two 8 ohm loads and with the 69-008-
03 power adaptor for the longest time we have tested during aging test without triggering the thermal
protection. It will do so on two 4 ohm loads and with a lab power supply also. It will output the same
RMS power listed in the specs with a sinewave signal on two 4 ohm loads and with a Luxi 69-008-03
power adaptor; but the adaptor will get hot over time. However all the real world signals, music or
speech, have much lower average to peak ratios than a sinewave signal. As a result this power amp
will output the same RMS power continuously with the real world music or speech signals on two 4 or 8
ohm loads with a Luxi 69-008-03 power adaptor as with a lab power supply.
Support:
Please contact your reseller directly for local support; or Luxi using the contact info in the
header. See Luxi website for additional and more updated documents.
