PS1 Powerstand / Signal Flow

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. 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:

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.

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