Luxi Electronics AMP-1002 User manual

Website: www.luxielectronics.com
Email: [e-mail]
Phone: [phone]
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
Thank you for purchasing the Luxi Electronics® AMP-1002
compact power amp. Please read through this manual before
using the product.
How the product functions: This product has 4 audio inputs: No
1 is a stereo balanced/unbalanced line input at +4 dBu level, No 2
is a mono unbal mic input at -20 dBV level, No 3 and No 4 each is
a stereo unbal line input at -10 dBV level. The No 1, 3 and 4 line inputs are equalized in level, then
these 3 left signals are mixed together, and 3 right signals are mixed together, controlled by the Line
Gain pot, then the volume control. The No. 2 mic input signal is equalized in level, controlled by the Mic
Gain pot, not controlled by volume control (to prevent feedback from speakers to mic), split evenly to
left and right channels, and mixed to the main left and right channels. Volume control is a standard 10
V reference voltage, external 10k ohm pot analog control for both left and right channels. See the block
diagram below.
Power options: This product draws power from an external 24 V 3 A power supply sold separately (Luxi
P/N 69-008-03). Do NOT plug the power supply connector into any other connectors; this could cause
permanent damages to the product and void the warranty.
Captive screw plug termination: The captive screw plugs for power, audio,
speakers and volume controls are supplied
with the unit. Separate the wires about 1”
(2.5 cm) long; strip off the wire insulation
precisely 3/16” (5 mm) from the end.
Identify the positive and negative leads for
power; Luxi power supply uses red wire for
the positive wire. If not sure, use a multi
meter to verify. Reversing power polarity
could cause permanent damages to the product and void the warranty.
Mounting options: Luxi has the under desk mount (Luxi P/N 78-002-01) or the MediaHub table tanks
sold separately; the product also fits many other mounting hardware from Extron, Middle Atlantic, etc.
Only use the type 4-40, 3/16” (5 mm) long screws supplied with the mounting hardware to screw onto

Website: www.luxielectronics.com
Email: [e-mail]
Phone: [phone]
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
the product. Wrong type of screw could strip the threads; too long screw could touch and short the
internal circuit, cause permanent damages to the product and void the warranty.
Control options: The product has two
recessed gain pots on the front panel,
one loudness control dip switch recessed
on the bottom of the unit, and a remote
volume control port on the rear panel.
The Line Gain pot controls the mixed 3
line input levels. The Mic Gain pot
controls the mic input levels. The
volume control only controls the volume
of the mixed 3 line input levels; it can
also be used for PA emergency mute.
See the external volume control and
mute circuit diagram to the right of here.
Audio input connector wiring:You can
use the standard 3.5 mm cable to
connect to input No 2 thru 4. The captive
screw connector for input No. 1 is
provided with the product. Follow the instructions on page 1 to cut the audio cable to needed length,
remove the overall cable jacket, separate the individual wires, strip off the wire insulation precisely 3/16”
(5 mm) from the end, and follow the wiring diagram below based on unbalanced or balanced input. In
unbalanced wiring, remember to use short jumper to connect pin 2 and 5 to pin 3 (ground the unused “-
“ inputs).
Speaker connector wiring: Follow the instructions on page 1 to cut the audio cable to needed length,
separate the individual wires, strip off the wire insulation precisely 3/16” (5 mm) from the end.
Important note: this is a bridged power amp, all 4 pins of this speaker connector are live and none of
them can be connected to ground or between each other. When connecting to a subwoofer with
speaker level summer and filter, check the resistance between the subwoofer’s “-“ side of the left and

Website: www.luxielectronics.com
Email: [e-mail]
Phone: [phone]
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.

Website: www.luxielectronics.com
Email: [e-mail]
Phone: [phone]
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
Product Specifications Part Number: 76-005-01
100 W (50 W x2) power amp Model: AMP-1002
Product Image Product Drawing
Featuresand Benefits Mechanical
> World's smallest 100 W (total) power amp; only 1 inch Enclosure material: steel
(2.5 cm) high, can fit in many tight spaces others can't Enclosure size: 4.29” x 1.00” x 3.00” (10.9 x 2.5 x 7.6 cm)
> One of the most efficient (up to 92%) class D power amps, Electrical (all numbersare typical)
no fans, no special ventilations needed; most reliable Gain (from input to speaker out at rated power)
> Full array of 4 inputs including 1 bal/unbal input, 1 wireless Bal: 20 dB; Line: 32 dB; Mic: 42 dB
mic receiver input, 2 line inputs Stereo channel crosstalk: 77 dB at 1 kHz
> All 4 inputs mixed to eliminate switching needs and pops CMRR (Bal input only): 66 dB at 1 kHz
> Separate line gain and mic gain (independent from volume) Input connectors: Bal/unbal: 5-pin 3.5 mm captive screws
> Remote 10k pot volume control for the instant changes and Line: two stereo TRS 3.5 mm mini jacks
ultra fine volume adjustments with infinity number of steps Mic: mono TS 3.5 mm mini jack
> Mute control for emergency PA duck Input impedance: Bal/unbal: 30k ohms; Line: 3.2k ohms
> EnergyStar qualified Mic: 3.2k ohms
> Ultra low 0.04% THD+N, ultra high 90 dB S/N at rated power Nominal input levels: Bal/unbal: +4 dBu (1.23 V) balanced
> Clip limiter Line: -10 dBV (316 mV) unbal; Mic: -20 dBV (100 mV) unbal
> Full over or under voltage, overheat, DC, short protections Max input levels: Bal/unbal: +26 dBu (15.6 V) balanced
> Multiple internal switching frequencies to prevent AM noises Line: +12 dBV (3.9 V); Mic: +1 dBV (1 V)
> UL rated (on external power adaptor) Input sensitivity: Bal/unbal: -8 dBu (0.31 V) balanced
> Status indication LED Line: -22 dBV (79 mV); Mic: -32 dBV (25 mV)
> Rack mountable, under-table mountable, above-projector, Speaker impedance: 4 to 16 ohms
behind flat TV mountable metal enclosures Typical output power: 54 Wrms x2, 4 ohm load, 1 kHz, 1% THD
Package 32 Wrms x2, 8 ohm load, 1 kHz, 1% THD (*see manual)
One piece in one color cardboard box; with captive screw Frequency response: 20 to 20k Hz +0/-0.7 dB at 8 ohm
plugs and quick start guide THD+N: 0.037% at 1 W, 8 ohm
no power adaptor S/N: 90 dB, Line input, unweighted, at 1% THD
Damping factor: >100 at 8 ohm
Box size: 5.9” x 4.8” x 1.1” (15.0 x 12.2 x 2.8 cm)
Weight: package, 0.73 lb (0.33kg); product, 0.55 lb (0.25kg)
36-pc box size: 15" x 12.6" x 8" (38 x 32 x 20.5 cm)
36-pc box weight: 28 lb (12.7 kg)
Connections
Input connectors: 4 inputs on captive screws and mini jacks
Output connector: 4-pin 5 mm captive screw receptacle Controls: Front panel Line Gain and Mic Gain recessed pots
Power connector: 2-pin 5 mm captive screw receptacle Line signals are controlled by main volume; Mic is not.
Control connectors: 3-pin 3.5 mm captive screw receptacle Rear panel volume control: 0-10 V DC, external 10k pot
Other Related Products Emergency PA mute by shorting the center pin to ground
Power adaptor, 100-240 V in on US plug, Power consumption: 24 V DC, up to 4 A
24 V out, P/N 69-008-03 Optional power supply: Not included. Luxi 69-008-03
Auto switching 100-240 V AC input on US plug, 24 V DC
Under desk mount, P/N 78-002-01 2.7 A max on bare wires, wall ward type, UL, PSE, CE, FCC
Mounting: Not included. Luxi under desk mount 78-002-01
compatible with several Extron and Middle Atlantic mounts
Regulatory compliance
Safety: CE, cUL, UL (power adaptor only)
90 W 70/100 V power amp EMI/EMC: CE, FCC Class A
P/N 76-006-01 MTBF: 30,000 hours
Warranty: 3 years parts and labor