The SETUP Menu

JBL

SPEAKER SETUP

CUSTOM SETUP

SETUP SPEAKERS CUSTOM SETUP

The CUSTOM SETUP menu can be used to configure the MAIN AUDIO OUTPUTS for a custom speaker system. For a Synthesis 7- channel setup that requires THX-certified loud speakers, use the SYNTHESIS 7CH SETUP menu (see page 3-24).

 

Default

 

Parameter

Value

Values

 

 

 

FRONT L/R

40Hz

FULL, 30Hz to 120Hz,

 

 

THX 80Hz

 

 

 

CENTER

60Hz

FULL, 30Hz to 120Hz,

 

 

THX 80Hz, NONE

 

 

 

SIDE L/R

60Hz

FULL, 30Hz to 120Hz,

 

 

THX 80Hz, NONE

 

 

 

REAR L/R

60Hz

FULL, 30Hz to 120Hz,

 

 

THX 80Hz, NONE

 

 

 

SUB L/R

MONO

MONO, STEREO, NONE

 

 

 

SUB XOVER

40Hz

FULL, 30Hz to 120Hz,

 

 

THX 80Hz

 

 

 

LFE

OFF

ON, OFF

 

 

 

Determining Crossover Settings

The CUSTOM SETUP menu allows different crossover points to be set for the following MAIN AUDIO OUTPUTS: FRONT L/R, CENTER, SIDE L/R, REAR L/R, and SUBWOOFER L/R. Crossover points can be set in 10Hz increments within a 30 to 120Hz range. All crossover settings activate a 24dB per octave filter, with the exception of THX 80Hz, which activates a 12dB per octave filter. The graphs on the next page illustrate the frequency response of the crossover settings.

For each output, select the crossover setting closest to the low-frequency rating of the corresponding speaker. For the SUBWOOFER L/R outputs, select the crossover setting that matches the lowest setting of the other speakers in the system. Crossover settings determine how the unit redirects low-frequency signals.

In general, low frequencies will be redirected from the outputs with the highest crossover setting to the outputs with the lowest crossover setting. Remaining low frequencies below the lowest crossover setting will be redirected to the SUBWOOFER L/R outputs. If the lowest crossover setting is FULL, no low frequencies will be redirected to the SUBWOOFER L/R outputs.

3-18

Page 51
Image 51
Lexicon SDP-40 manual Speaker Setup Custom Setup, Determining Crossover Settings