Difference between revisions of "PS1 Powerstand / Signal Flow"

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(Hilmar's notes on the preamp)
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=== Signal Flow ===
 
=== Signal Flow ===
 
Q: What happens to my input on Channel 1 or 2 as it flows through the {{PS1}}?
 
Q: What happens to my input on Channel 1 or 2 as it flows through the {{PS1}}?
 +
 
A: As provided by Kyle-at-Bose <ref>Kyle-at-Bose [http://bose.infopop.cc/eve/forums?a=tpc&f=3976055944&m=6921014061&r=9701065514#9701065514 in the Bose Musicians Discussion Boards]</ref>
 
A: As provided by Kyle-at-Bose <ref>Kyle-at-Bose [http://bose.infopop.cc/eve/forums?a=tpc&f=3976055944&m=6921014061&r=9701065514#9701065514 in the Bose Musicians Discussion Boards]</ref>
 
# Input Line (&frac14; inch)  or XLR input
 
# Input Line (&frac14; inch)  or XLR input
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=== Preamps ===
 
=== Preamps ===
 
Q: Do I get the benefits of the Preamps if I use the &frac14; inch inputs on the {{PS1}} Channel 1 or 2  
 
Q: Do I get the benefits of the Preamps if I use the &frac14; inch inputs on the {{PS1}} Channel 1 or 2  
 +
 
A: Yes. Whether or you use the Input Line (&frac14; inch)  or XLR input the signal flows through the Preamp.
 
A: Yes. Whether or you use the Input Line (&frac14; inch)  or XLR input the signal flows through the Preamp.
Hilmar-at-Bose <ref>Hilmar-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/867107664/m/8491032313?r=4771073313#4771073313 in the Bose Musicians Discussion Boards]</ref>
+
 
Both XLR and &frac14; inch input go through the same preamp but they see a little different conditioning before they get there. The XLR connects to a is balanced low impedance input stage with a lot of gain. The &frac14; inch input is unbalanced, has about 20 dB less overall gain but a very high input impedance.
+
Hilmar-at-Bose provided this:<ref>Hilmar-at-Bose [http://bose.infopop.cc/eve/forums/a/tpc/f/867107664/m/8491032313?r=4771073313#4771073313 in the Bose Musicians Discussion Boards]</ref>
 +
 
 +
Both XLR and &frac14; inch input go through the same preamp but they see a little different conditioning before they get there.  
 +
* The XLR connects to a is balanced low impedance input stage with a lot of gain.  
 +
* The &frac14; inch input is unbalanced, has about 20 dB less overall gain but a very high input impedance.
  
 
Q: What is the input impedance of the &frac14; inch Channel 1 or Channel 2 Inputs
 
Q: What is the input impedance of the &frac14; inch Channel 1 or Channel 2 Inputs
 +
 
A: Approximately 1 megOhm.
 
A: Approximately 1 megOhm.
  
 +
Here is an illustration that may help.
  
 
[[Image:SignalFlow2.gif]]
 
[[Image:SignalFlow2.gif]]

Revision as of 23:19, 10 December 2006

Signal Flow

Q: What happens to my input on Channel 1 or 2 as it flows through the PS1 Power Stand (Classic) / Model I?

A: As provided by Kyle-at-Bose [1]

  1. Input Line (¼ inch) or XLR input
  2. Trim
  3. R1 Remote Channel Level
  4. Insert Loop
  5. R1 Remote EQ
  6. Preset Processing
  7. Crossover
    1. L1 Cylindrical Radiator® loudspeaker and B1 Bass Module if B1 is present or
    2. L1 Cylindrical Radiator® loudspeaker and Bass Line-Out if something is inserted in Bass Line-Out
  8. Master Level

Preamps

Q: Do I get the benefits of the Preamps if I use the ¼ inch inputs on the PS1 Power Stand (Classic) / Model I Channel 1 or 2

A: Yes. Whether or you use the Input Line (¼ inch) or XLR input the signal flows through the Preamp.

Hilmar-at-Bose provided this:[2]

Both XLR and ¼ inch input go through the same preamp but they see a little different conditioning before they get there.

  • The XLR connects to a is balanced low impedance input stage with a lot of gain.
  • The ¼ inch input is unbalanced, has about 20 dB less overall gain but a very high input impedance.

Q: What is the input impedance of the ¼ inch Channel 1 or Channel 2 Inputs

A: Approximately 1 megOhm.

Here is an illustration that may help.

SignalFlow2.gif