Bose L1 Model II Owner's Manual - Page 29

Browse online or download pdf Owner's Manual for Stereo System Bose L1 Model II. Bose L1 Model II 32 pages. Portable line array systems
Also for Bose L1 Model II: Owner's Manual (32 pages), Owner's Manual (28 pages), Technical Data Sheet (8 pages), Technical Data Sheet (8 pages), Application Manual (13 pages), Manual (15 pages)

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Problem

B1 bass module sounds

out of balance with the

system

No mid/high sounds heard

from the L1 model I

Cylindrical Radiator

loudspeaker

System momentarily mutes

when changing presets or

plugging/unplugging the

B1 bass module

Microphone sounds

distorted

One of the four

instruments plugged into

the L1 model I power stand

is at a lower volume than

the others

Line OUT signals on

channels 1 and 2 are very

loud when connected to

another L1 model I power

stand or a mixer with only

mic-level input

Line OUT signals on

channels 1 and 2 are very

noisy

Third-party powered sub-

woofer sounds poor when

connected to the Bass -

Line OUT connector on

the L1 model I power stand

B1 bass modules powered

by a third-party power

amplifier and connected to

the Bass - Line OUT

connector sounds poor

What to do

• Make sure you are using the (blue) B1 bass module 4-wire cable included with the B1

bass module package.

• Make sure that the B1 bass module grille is facing forward toward the musicians and

audience.

• Make sure L1 model I Cylindrical Radiator

connectors.

• Make sure connections are not bent or broken.

• Try cleaning the contacts on the L1 model I Cylindrical Radiator™ loudspeakers with

electronic contact spray cleaner.

• This is a feature of the L1 model I power stand that allows the user to hear that internal

changes have been made.

• Make sure the red clip light is not constantly on. If it is, lower the trim.

• Try a different microphone.

• Try your microphone on another L1 model I power stand.

• If the instrument is plugged into Channel 3/4, use a direct box or high-to-low

transformer (high impedance instruments, such as non-active guitars or basses, are not

designed to be plugged directly into a low impedance input).

• If the instrument's volume is still lower than the others, try a similar instrument in the

same channel. If this solves the problem, your instrument may not be working correctly.

• The Line OUT jack operates at a +4dBu professional line level; it is meant to connect to

compatible mixing consoles.

• Use inline pads to reduce the signal gain to a manageable level.

• Line OUT is not meant to be used with L1 model I power stands. Some advanced

configurations are detailed online at www.Bose.com/musicians.

• Check to make sure that the receiving device (mixer) is set up to receive a +4dBu level

signal.

• Try powering the receiving device from the same outlet as the L1 model I power stand.

• Try using an XLR ground-lift barrel adapter or direct box.

• Unplug any B1 bass modules that may be connected to the L1 model I power stand.

• The signal from the Bass - Line Out may be too high for the powered subwoofer, try

attenuating the signal using commercially available direct boxes or in-line pad devices.

• Try different connections to the third-party powered subwoofer such as balanced or

unbalanced cabling and/or a direct box.

• Check that the gain and input controls on the third-party powered subwoofer are set

appropriately.

• If using a powered subwoofer with an adjustable crossover, set the crossover to 180Hz.

• Ensure that at least two B1 bass modules are powered directly from the L1 model I

power stand (connected to the L1 model I power stand's B1 Bass Module jack) and

using the (blue) B1 bass module 4-wire cable.

• Check the gain settings on the third-party power amplifier. The volume level of the B1

bass modules powered by the L1 model I power stand should be similar to the bass

modules powered by the external amplifier.

loudspeakers are firmly seated in their

ROUBLESHOOTING