Template:Bass Line Out

Usage:

 {{Bass Line Out
 |icons={{Classic icon}} (or other icons as required)
 |panelImage= image to display showing connections   
       [[Image:ModelIBassOutputs.png|Model I right side Input/Output panel]] or [[Image:ModelIIBassOutputs.png|Model II Bass Outputs]]
 |Crossover=180 (or 200 for Model II)
 }}

The behavior of the bass line out and B1 Bass Module outputs on the L1 Classic / L1 Model I / L1 Model II are based on the philosophy that adding B1 Bass Modules should give the user more dynamic range (can play louder) but should not alter the tone of the instrument, including tone adjustments made using the R1 Remote, the T1 ToneMatch Audio Engine or other tone-shaping equipment.

This philosophy is notably different from other manufacturers, who take the approach that it's okay (or desirable) that adding more bass speakers causes the instrument tone to become "bassier".

With this philosophy in mind, here is how the bass line out and B1 outputs work.

No cable plugged into the Bass Line out

B1s connected	Output	EQ	Bass Signal Gain	Notes
1	40Hz-180Hz	B1 specific EQ	Reference Level
2	40Hz-180Hz	B1 specific EQ	Reference Level -6 dB	Why? Because when you add a second B1, if you did not change the signal strength you would get 6 dB more bass relative to the mids and highs. This would alter the tone of the instrument. To keep the tone the same, while still allowing the more dynamic range (system can play louder by 6 dB) the signal level must be reduced by 6 dB.

Cable connected to the Bass Line Out

B1s connected	Output	EQ	Bass Signal Gain	Notes
0	40Hz-180Hz	Flat EQ	Reference Level -6 dB
1	40Hz-180Hz	B1 specific EQ on Bass Line Out and B1 Out	Reference Level - 6 dB	If you are using a PackLite® power amplifier model A1 Extended Bass Package this is a total of 3 B1s (2 on the A1 and 1 on the Power Stand)
2	40Hz-180Hz	B1 specific EQ on Bass Line Out and B1 Out	Reference Level -12 dB	If you are using a PackLite® power amplifier model A1 Extended Bass Package this is a total of 4 B1s (2 on the A1 and 2 on the Power Stand)

With More Than 4 B1s

The Power Stand does not measure the exact number of PackLite^® power amplifier model A1s, so there is a slight error if you use anything but 1,2, or 4 B1s.

For 6 B1s you will be 3.5 dB bass heavy, for 8 B1s it'll be 6 dB heavy.

B2 Bass Module connected to the Bass Module Output (powered output)

Note — Operation of the B2 with the Model I/Classic is only supported with the B2 Bass Level Switch set to Normal.

See: Is the B2 Bass Module Compatible with the L1® Classic or Model I

Output if no B1 Bass Modules detected

• 40-180 Hz with B2 EQ applied if you have the current L1® Model II Power Stand Firmware Updates
  • If you do not have the current firmware: 40-180 Hz Bandpass (that is: NO B1 EQ)
• The system Crossover for the Cylindrical Radiator®s is 180 Hz

If one or two B1 Bass Modules is detected or emulated using resistors across NL4 2+ / 2- pins

• 40-180 Hz with different EQ curves
• The system Crossover for the Cylindrical Radiator®s is 180 Hz

For details on how to do this see: Activating B1 EQ Curves and Using a Different Sub

Bass Module Output (powered output)

For the sake of those attaching third party passive speakers (an unsupported application), the output characteristics are the same as for the the B2 Bass Module (section immediately above).

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Original Source - Hilmar-at-Bose