Thule PR350 B V350 Manual Do Utilizador

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page 17

 

6.1 Speakers 
The SPACE PR350 B contains extensive bass management adjustments, so that 
the bass signal can be re-routed to those loudspeakers capable of handling the low 
frequency information. 
 
 
The following selections can be made in the config.speaker menu by using naviga-
tion keys described above: 
 
Left speaker (L): 

 

 SMALL or LARGE 

Right speaker (R):    

SMALL or LARGE 

Center speaker (C): 

 SMALL or LARGE or OFF 

Surround left speaker (SL): 

SMALL or LARGE or OFF 

Surround right speaker (SR):  SMALL or LARGE or OFF 
Subwoofer (SUB):    

ON or OFF 

 
 
The bass signal directed to speakers selected as SMALL, will be re-routed to the     -
subwoofer, or the L,R speakers (bass management). 
If a speaker is turned off, the sound signal will be sent to the remaining speakers, 
which are selected as active (down mixing). 
 
Special attention should be given to the subwoofer management: 
 
For Dolby Digital 3/2 and DTS input stream a special low frequency channel (LFE) is 
normally included, which is indicated with a “.1” after the input stream indication, e.g. 
3/2 .1 . The LFE channel produces an output at the subwoofer. That means even if 
all speakers are chosen LARGE, where no signal is send to the subwoofer by the 
bass management, signal will be send to the Subwoofer from the LFE input channel. 
For Stereo and ProLogic II no LFE channel is present. And if all speakers are 
chosen LARGE, the bass management does not send any signal to the subwoofer. 
In this case to have a subwoofer signal, the user can select the subwoofer – max 
bass ON option under the config.cross freq menu. In this case PR250 B takes the 
summed full range signal from the L and R channels and send to the subwoofer.  
 
In case of using subwoofer (subwoofer is activated) in Stereo and Pro Logic mode, 
the user should therefore decide: 
a ) Select L and R (or L,R,C,SL,SR in Pro Logic) to be SMALL. Then the low 

frequencies will be send to the subwoofer by the bassmanagement. The 
crossover frequency is set in the config.cross freq menu. 

 
or 
 
b) Select L and R (or L,R,C,SL,SR in Pro Logic) to be LARGE and then select 

Subwoofer – max bass ON in the config.cross freq menu. In this case the full 
range summed mono signal from the other channels, will be send to the 
subwoofer. 

 
The implication of b) is that “double bass” is present in the system. That means the 
user should eventually chose a lower gain setting for the subwoofer, e.g. –4 to –8 dB 
depending on the sensitivity of the subwoofer relative to the other speakers.