Difference between revisions of "Template:Bass Line Out"

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==Bass Line Out and B1 behavior ==
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== Bass Line Out and B1 behavior ==
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<includeonly>[[Image:ModelIIBassOutputs.png|right|Model II Bass Outputs]]</includeonly>
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[[Image:ModelIBassOutputs.png|Model I right side Input/Output panel]]
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Hilmar-at-Bose<ref>Hilmar-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/6121039062/r/2641067362#2641067362  A1 PackLite Questions and More Bass Talk]</ref>.
 
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This is based on the design goal that “You should always sound the same; no matter how much Bass stuff is attached” I can try to explain my view of why this is a good design goal (of which you may disagree) but let’s look at the actual behavior first.
 
  
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'''Note''' The Model II differs from the Classic and Model I in that the crossover is at 200 Hz for the Model II. The Classic and Model I crossover is at 180 Hz.
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</includeonly>
  
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=== Without Bass Line out ===
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The behavior of the bass line out and B1 Bass Module outputs on the {{Classic}} and {{Model I}} are based on the philosophy that adding {{B1}}s 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}}, the {{T1}} or other tone-shaping equipment.
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* 1 x B1: 40Hz-200Hz, B1 specific EQ, some nominal gain that we call 0dB
 
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* 2 x B1: 40Hz-200Hz, B1 specific EQ, -6dB as compared to nominal
 
  
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=== With Bass Line Out ===
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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".
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* 0 x B1 connected to Power Stand: 40Hz-200 Hz, flat, roughly the same gain as 2 B1
 
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* 1 x B1 connected to Power Stand: 40Hz-200Hz, B1 specific EQ, -6dB as compared to nominal
 
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** If you use  a {{A1 EB}} this is a total of 3 B1s
 
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* 2 x B1 connected to Power Stand: 40Hz-200Hz, B1 specific EQ, -12dB as compared to nominal
 
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** If you use a {{A1 EB}} this is a total of 4 B1s
 
  
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What this complex behavior does is the following. No matter if you attach 1, 2, or 4 B1s, you will get pretty much the same balance between all combined B1s and the L1s. It’s a little off for 3, 5, 6, 7 & 8 B1s, but still reasonably close.  
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With this philosophy in mind, here is how the bass line out and B1 outputs work.
  
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It’s true that the user doesn’t have to re-EQ our systems if you add more B1s or even a PackLite with another pair of B1s. But that’s unique to our system, because we were actively measuring the number of B1s attached. So re-EQ is required, but the system is doing it by itself without any user involvement required. <ref>Hilmar-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9641017814?r=8691027814#8691027814 Third Party Woofers]</ref>
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=== No cable plugged into the Bass Line out ===
 +
<table border="0">
 +
<tr>
 +
<th>B1s connected</th>
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<th>Output</th><th>EQ</th>
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<th>Bass Signal Gain</th>
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</tr>
 +
<tr>
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<td>1</td>
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<td>40Hz-{{{Crossover|180}}}Hz</td>
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<td>B1 specific EQ</td>
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<td>Reference Level</td>
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</tr>
 +
<tr>
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<td>2</td>
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<td>40Hz-{{{Crossover|180}}}Hz</td>
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<td>B1 specific EQ</td>
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<td>Reference Level -6 dB</td>
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</tr>
 +
</table>
  
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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.
  
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=== With More Than 4 B1s ===
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=== Cable connected to the Bass Line Out ===
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A little more insight. <ref>Hilmar-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9641017814?r=4081020914#4081020914 Third Party Subwoofers]</ref>
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<table border="0">
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We actually can't measure the exact number of Packlites, 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.
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<tr>
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However, these are rare cases, and if you go through the trouble to hook up 8 B1s, I guess you are actually looking for something more bass heavy.
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<th>B1s connected</th>
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<th>Output</th><th>EQ</th>
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<th>Bass Signal Gain</th>
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<th>Notes</th>
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</tr>
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<tr>
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<td style="valign;top">0</td>
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<td style="valign;top">40Hz-{{{Crossover|180}}}Hz</td>
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<td style="valign;top">Flat EQ</td>
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<td style="valign;top">Reference Level - 6 dB</td>
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</tr>
  
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Don't ask how I know.
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<tr>
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<td style="valign;top">1</td>
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<td style="valign;top">40Hz-{{{Crossover|180}}}Hz</td>
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<td style="valign;top">B1 specific EQ on Bass Line Out and B1 Out</td>
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<td style="valign;top">Reference Level - 6 dB</td>
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<td style="valign;top">If you are using  a {{A1 EB}} this is a total of 3 B1s (2 on the A1 and 1 on the Power Stand) </td>
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</tr>
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<tr>
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<td style="valign;top">2</td>
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<td style="valign;top">40Hz-{{{Crossover|180}}}Hz</td>
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<td style="valign;top">B1 specific EQ on Bass Line Out and B1 Out</td>
 +
<td style="valign;top">Reference Level - 6 dB</td>
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<td style="valign;top">If you are using  a {{A1 EB}} this is a total of 4 B1s (2 on the A1 and 4 on the Power Stand) </td>
  
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== {{Model II}} Crossover <noinclude>{{L1 CR}} </noinclude>==
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</tr>
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</table>
  
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There is no change in crossover frequency for the Cylindrical Radiators® depending on the presence/absence of {{B1}}s attached to the Bass Module output. This is due to the design change (Cylindrical Radiator® is not ported whereas Classic and Model I are.) The {{Model II}} is designed to always be used with at least one B1, whereas the {{Model I}} / {{Classic}} was designed to used with or without a {{B1}}.
 
  
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* If there is 0 x B1 connected to B1 Bass Module output on the PS1: flat EQ on Bass Line Out, bass signal gain = REFERENCE LEVEL - 6 dB
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* If there is 1 x B1 connected to B1 Bass Module output on the PS1: B1 EQ on Bass Line Out and B1 Out, bass signal gain = REFERENCE LEVEL - 6 dB
 +
** If you are using  a {{A1 EB}} this is a total of 3 B1s (2 on the A1 and 1 on the PS1)
 +
* If there are 2 x B1 connected to B1 Bass Module output on the PS1: B1 EQ on Bass Line Out and B1 Out, bass signal gain = REFERENCE LEVEL - 12 dB
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** If you are using a {{A1 EB}} this is a total of 4 B1s
  
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=== Bass Module Output (powered output) ===
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=== With More Than 4 B1s ===
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<section begin=Bass Module Output />
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The PS1 does not measure the exact number of {{A1}}s, so there is a slight error if you use anything but 1,2, or 4 B1s.  
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For the sake of those attaching third party passive speakers (an unsupported application).
 
  
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Output if no {{B1}}s detected
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For 6 B1s you will be 3.5 dB bass heavy, for 8 B1s it'll be 6 dB heavy.
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* 40-200 Hz Bandpass (that is: NO B1 EQ)
 
  
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If one or two {{B1}}s detected (or resistors used across NL4 2+ / 2- pins to emulate detection)
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=== Details for Experts ===
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* 40-200 Hz with different EQ curves
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<includeonly>[[Bass Output for Experts / Classic / Model I]]</includeonly>
  
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For details on how to do this see: [[Activating B1 EQ Curves]] and [[Using a Different Sub]]
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<noinclude>
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<section end=Bass Module Output />
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{{:Bass Output for Experts / Classic / Model I}}
 +
</noinclude>
 
<noinclude>
 
<noinclude>
 
----
 
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[[Category:A1 PackLite®]]
 
[[Category:A1 PackLite®]]
 
[[Category:PS1 Powerstand]]
 
[[Category:PS1 Powerstand]]
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[[Category:Model II]]
 
 
[[Category:Bass]]
 
[[Category:Bass]]
 
[[Category:B1 Bass Module]]
 
[[Category:B1 Bass Module]]
 
</noinclude>
 
</noinclude>

Revision as of 17:05, 14 January 2009

Usage: 

 {{Bass Output for Experts
 |icons={{Classic icon}} (or other icons as required)
 |Crossover=180 (or 200 for Model II)
 }}



Most of the information here was originally written for the L1 Classic and L1 Model I. I have verified with MikeZ-at-Bose, that this is applicable to the L1 Model II. The exception is that the crossover point is 200 Hz. The Classic/Model I crossover is 180 Hz. There is a little more detail about the L1 Model II crossover at the end. ST

Model II Bass Outputs


Bass Line Out and B1 behavior

Model I right side Input/Output panel

</includeonly>

The behavior of the bass line out and B1 Bass Module outputs on the L1 Classic and L1 Model I 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 OutputEQ Bass Signal Gain
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 OutputEQ 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 - 6 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 4 on the Power Stand)


  • If there is 0 x B1 connected to B1 Bass Module output on the PS1: flat EQ on Bass Line Out, bass signal gain = REFERENCE LEVEL - 6 dB
  • If there is 1 x B1 connected to B1 Bass Module output on the PS1: B1 EQ on Bass Line Out and B1 Out, bass signal gain = REFERENCE LEVEL - 6 dB
  • If there are 2 x B1 connected to B1 Bass Module output on the PS1: B1 EQ on Bass Line Out and B1 Out, bass signal gain = REFERENCE LEVEL - 12 dB

With More Than 4 B1s

The PS1 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.

Details for Experts

Bass Output for Experts / Classic / Model I



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