No bass.

Low frequency driver is not

Disconnect the 2 wires from the amplifier, switch the loudspeaker to

(Note: Model 47 has 2 LF drivers wired

functioning.

BIAMP mode, and, using an ohmmeter, measure the resistance

in parallel.)

 

between the wires. If the meter reads an open circuit, the LF driver

 

 

may not be working. For the model 47 both drivers may not be

 

 

working. Replace as needed.

Bass is weak on model 47.

One LF driver is not

Disconnect the 2 wires from the amplifier, switch the loudspeaker to

(Note: Model 47 has 2 LF drivers wired

functioning.

BIAMP mode, and, using an ohmmeter, measure the resistance

in parallel.)

 

between the wires. If the meter reads 6 Ohms, one LF driver may not

 

 

be working. 3 Ohms is the normal reading. Replace as needed.

Low or no volume for the midrange.

Mid frequency driver or

Listen at low level to the mid-range driver located in the middle of the

(Model 46 only)

crossover is malfunctioning.

enclosure. If some sound is heard from the driver and it is not

 

 

distorted, it is probably a crossover problem. If distorted sound or no

 

 

sound is heard, either the crossover or the driver may not be working

 

 

properly. Repair or replace as needed.

High frequencies are too weak or too

High Frequency Level switch

The High Frequency Level switch on the input panel has 2 positions.

bright.

needs adjustment

The +4 dB position provides more highs and the Flat less highs.

No high frequencies.

PASSIVE / BIAMP switch in the

Move the switch on the input panel to the PASSIVE (up) position.

 

wrong position.

 

No midrange and highs on model 46.

PASSIVE / BIAMP switch in the

Move the switch on the input panel to the PASSIVE (up) position.

 

wrong position.

 

No high frequencies.

High frequency driver or

Listen at low levels, to the high frequency driver. If some sound is

 

crossover is malfunctioning.

heard 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.

SYMPTOMS - BIAMP MODE

PROBABLE CAUSE

WHAT TO DO

 

 

 

Bass is distorted and highs are muffled.

1/4 in. jacks instead of Neutrik

For BIAMP mode a Neutrik input jack must be used. One of the 1/4 in.

 

jack is being used.

jacks can function as the LF input but if both the HF and LF amplifiers

 

 

are plugged into the 1/4 in. jacks, this will short the amplifiers together

 

 

and no signal will be fed to the HF. This can also damage your

 

 

amplifiers.

Using an electronic crossover, bass is

The wiring for LF and HF

Check wiring to the loudspeaker and make sure the LF is going to pins

weak and highs are muffled.

sections is reversed.

1+ / 1- and the HF is going to pins 2+ / 2- on the Neutrik connector.

Using an electronic crossover, bass is

The wiring for LF and HF

Check wiring from crossover to amplifiers and amplifiers to

weak and highs are muffled.

sections is reversed.

loudspeaker. Make sure the LF signal connects to the loudspeaker’s LF

 

 

input and the HF signal connects to the loudspeaker’s HF input.

Poor sound quality.

Incorrect polarity connections.

Check the connections to the LF and HF sections. Verify the polarity is

 

 

correct.: + and - amplifier outputs connect to corresponding + and -

 

 

on loudspeaker’s LF and HF inputs on the Neutrik connector.

Sound OK but HF amplifier level

PASSIVE / BIAMP switch in the

Move the switch to the BIAMP (down) position.

cannot be adjusted.

wrong position.

 

Bass is weak.

LF and HF amplifiers are not

Either turn up the LF amplifier or turn down the HF amplifier to get

 

properly adjusted.

more lows.

Bass is weak on model 47.

LF driver is not functioning.

Disconnect the 2 wires from the LF amplifier and, using an ohmmeter,

 

 

measure the resistance between the wires. If the meter reads 6 Ohms

 

 

one LF driver may not be working. 3 Ohms is the normal reading.

 

 

Replace as needed.

No sound or no bass or no highs using

Neutrik connector not seated

Make sure Neutrik connector is fully seated by twisting it clockwise

Neutrik connector

 

about 1/4 turn after plugging it in. Then engage the locking ring.

No bass.

Wrong connection.

Make sure LF amplifier is either wired to pins 1+ /1- on the Neutrik

 

 

connector or is connected to one of the 1/4 in. jacks.

No bass.

LF driver is not functioning.

Disconnect the 2 wires from the LF amplifier and, using an ohmmeter,

 

 

measure the resistance between the wires. If it reads an open circuit,

 

 

the LF driver may not be working. Replace as needed.

No bass.

LF amplifier is not on or

Check that the LF amplifier is turned on and that the loudspeaker is

 

loudspeaker disconnected.

properly connected to the amplifier.

No bass.

LF section of electronic

Check that the electronic crossover has LF output and that it is

 

crossover is not working.

properly connected to the amplifier.

Midrange and highs are weak.

HF and LF amplifiers are not

Either turn up the HF amplifier or turn down the LF amplifier to get

 

properly adjusted.

more highs.

No midrange or highs.

HF amplifier is not on or

Check that the HF amplifier is turned on and that it is properly

 

loudspeaker disconnected.

connected to the loudspeaker pins 1+ / 1- on the Neutrik connector.

No high frequencies.

HF amplifier is not on or

Check that the HF amplifier is turned on and that loudspeaker is

 

loudspeaker disconnected.

properly connected to the amplifier.

PAGE 39 Community XLT / XLTE Series Owner’s Manual

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Atlas Sound XLTE owner manual No bass