Atlas Sound XLTE owner manual No high frequencies

No high frequencies.	High frequency driver or	Listen at low level to the high frequency driver. If some sound is heard
	crossover is malfunctioning.	from this area and it is not distorted, it is probably a crossover
		problem. If distorted sound or no sound is heard, the driver or
		crossover may not be working properly. Replace as needed.
SYMPTOM - SUBWOOFER	PROBABLE CAUSE	WHAT TO DO
No bass using Neutrik connector	Neutrik connector not seated	Make sure Neutrik connector is fully seated by twisting it clockwise
		about 1/4 turn after plugging it in. Then engage the locking ring.
Distortion, low volume, or no volume	Cold/open solder joint on the	Using an ohmmeter, check the continuity of the crimp connectors, all
from any or all drivers.	input panel or faulty wiring	solder joints on the input panel and the wiring to the drivers.	Also
	connection.	visually inspect solder joints as cold joints may only malfunction with
		higher current than the ohmmeter supplies. Repair as needed.
No bass or bass is weak using an	No signal to the subwoofer.	Check that the electronic crossover has subwoofer output, that it is
electronic crossover.		properly connected to the amplifier, that the amplifier is properly
		connected to the subwoofer, and that there is sufficient gain to drive
		the subwoofer in relation to the full-range loudspeakers.
Bass is weak.	Incorrect subwoofer polarity.	Verify the polarity is correct: + and - amplifier outputs go to + and -
		on loudspeaker. Note that in some cases, due to physical loudspeaker
		placement, a reversed polarity connection will provide better coupling
		to the full-range loudspeaker. Check by changing the polarity.
Bass is weak.	Poor physical placement.	Note that in some cases, the physical placement of a subwoofer can
		have a significant effect on the bass energy in the listening area. If
		possible, move the subwoofer at least 10 feet from its present location
		to see if the bass energy changes. If it does than you may have to
		change the subwoofer location.
No bass from 51.	Driver is not functioning.	Disconnect the amplifier and, using an ohmmeter, measure the
		resistance at one of the input jacks. If the meter reads as an open
		circuit, the LF drivers may not be working. Replace as needed.
Bass is weak on model 55.	One driver not functioning.	Disconnect the 2 wires from the amplifier, switch the loudspeaker to
(Note: The 55 has 2 LF drivers wired in		BIAMP mode, and, using an ohmmeter, measure the resistance
parallel.)		between the wires. If the meter reads about 6 Ohms one LF driver may
		not be working. 3 Ohms is the normal reading. Replace as needed.
No bass from 55.	Both drivers may not be	Disconnect the 2 wires from the amplifier and, using an ohmmeter,
(Note: The 55 has 2 LF drivers wired in	functioning.	measure the resistance between the wires. If the meter reads an open
parallel.)		circuit, both LF drivers may not be working. Replace as needed.
No bass or bass is weak in system.	Subwoofer is not functioning.	Assuming all cabling and connections for the amplifiers are OK, listen
		to the subwoofer at moderate levels for output from the driver(s). If
		there is none the driver(s) may be malfunctioning and need repair.
FULL-RANGE OPERATED FROM SUBWOOFER FULL-RANGE OUTPUT
SYMPTOM	PROBABLE CAUSE	WHAT TO DO
No sound from full-range loudspeaker.	High pass crossover not	Disconnect subwoofer and connect full-range loudspeaker directly to
	working.	the power amplifier. If it works OK then the crossover in subwoofer
		is probably not working. If it does not work OK, see symptoms for
		full-range loudspeakers.
No sound from full-range loudspeaker.	Cold or open solder joint on	Using an ohmmeter, check the continuity of the crimp connectors, all
	the subwoofer input panel or	solder joints on the input panel and the wiring to the drivers.	Also
	faulty wiring connection.	visually inspect solder joints as cold joints may only malfunction with
		higher current than the ohmmeter supplies. Repair as needed.
Low volume from full-range	Acoustic balance not optimum.	When using the FULL-RANGE output on the subwoofer to feed a full-
loudspeaker or subwoofer.		range loudspeaker, the acoustic balance between them is determined
		by their efficiencies. If this balance is not suitable then separate
		amplifiers for the subwoofer and full-range loudspeaker are
		recommended. The acoustic balance can then be adjusted using the
		amplifier input level controls.
No sound from subwoofer.	Subwoofer not working.	See symptoms for subwoofers.
POLARITY CHECK FOR TWO LOUDSPEAKERS OR SUBWOOFERS
Sound image is poor and bass weak	Stand in front of and exactly between the loudspeakers or subwoofers. Play a mono source through
	the system. If the sound does not appear to come solidly from a point between the loudspeakers
	and/or the bass is weak, they are probably out of polarity. Check the + and - wiring for the entire
	signal chain to each loudspeaker. The wiring should be identical.

PAGE 40 Community XLT / XLTE Series Owner’s Manual