PS1 Powerstand / Signal Flow

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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



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 input is a 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.


More Information

For detailed information about the signal flow see: Model I Technical Data Sheet