Difference between revisions of "PS1 Powerstand"

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Just a few physical tips here. See  [[PS1 Connections]] for making the connections.
 
Just a few physical tips here. See  [[PS1 Connections]] for making the connections.
  
== How to interpret the "clip" LEDs ==
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== How to Interpret the LEDs Near the Channel 1 and Channel 2 Inputs ==
There are two LEDs on the PS1 powerstand -- one for Channel 1 and another for Channel 2. They work in concert with the trim control on each of these two inputs and are turned on and off depending on the signal level after the gain supplied by the trim control.
 
  
These LEDs turn from off to green when there's more than a little bit of signal. Thus GREEN indicates "there's some signal in the channel". This can be useful if for example, you speak into a microphone and the LED does not turn green, which could indicate a broken microphone or defective mic cable.
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There are two LEDs on the PS1 powerstand -- one for Channel 1 and another for Channel 2.  
  
The LEDs turn from green to red when at a level that leaves 10 dB of headroom before clipping. Said another way, when you see RED on the LED it does NOT mean you are clipping. It means "do not add any more gain on the trim control" and you will have a safe amount of headroom for virtually any performance.
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The channel input LED works in concert with the Trim Control located nearby. The trim control adjustst the amount of gain in the preamplifier.
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 +
The LEDs is activated when the signal level at a point just '''after the preamplifier''' reaches certain thresholds.
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 +
:The LEDs turn from '''off to green''' when there's more than a little bit of signal.
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 +
:The LEDs turn from '''green to red''' when at the signal reaches a level that's about 10 dB below a level that would clip the preamp and cause objectionable distortion.  
 +
 
 +
'''When the LED is off but you are playing or singing''': You are not delivering a signal to the input and/or the trim control is too low.
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'''When you see green only''': This indicates that there's some signal in the channel. Singing or playing as loud as you plan to in performance, increase the trim level until the LED is only flickering red. This is the optimal gain.
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'''When you see red most of the time''': Descrease the trim level until you see only flickering red. This is the optimal gain.
  
 
== Leaving it in the bag  ==
 
== Leaving it in the bag  ==
 +
 +
 
It is okay to do this if you like (and personally I find it a lot quicker for setup/teardown)
 
It is okay to do this if you like (and personally I find it a lot quicker for setup/teardown)
  
 
== Heat  ==
 
== Heat  ==
 +
 
Hilmar-at-Bose speaks about the heat <ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5701037022/r/7991054522#7991054522 Hilmar-at-Bose speaks about the heat in the Bose® Musicians Community Message Boards]</ref>  
 
Hilmar-at-Bose speaks about the heat <ref>[http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/5701037022/r/7991054522#7991054522 Hilmar-at-Bose speaks about the heat in the Bose® Musicians Community Message Boards]</ref>  
  

Revision as of 15:02, 24 August 2006

PS1 Powerstand

Connections

Inputs and Outputs (interactive display) showing connections directly from the Bose Musicians Site

Just a few physical tips here. See PS1 Connections for making the connections.

How to Interpret the LEDs Near the Channel 1 and Channel 2 Inputs

There are two LEDs on the PS1 powerstand -- one for Channel 1 and another for Channel 2.

The channel input LED works in concert with the Trim Control located nearby. The trim control adjustst the amount of gain in the preamplifier.

The LEDs is activated when the signal level at a point just after the preamplifier reaches certain thresholds.

The LEDs turn from off to green when there's more than a little bit of signal.
The LEDs turn from green to red when at the signal reaches a level that's about 10 dB below a level that would clip the preamp and cause objectionable distortion.

When the LED is off but you are playing or singing: You are not delivering a signal to the input and/or the trim control is too low.

When you see green only: This indicates that there's some signal in the channel. Singing or playing as loud as you plan to in performance, increase the trim level until the LED is only flickering red. This is the optimal gain.

When you see red most of the time: Descrease the trim level until you see only flickering red. This is the optimal gain.

Leaving it in the bag

It is okay to do this if you like (and personally I find it a lot quicker for setup/teardown)

Heat

Hilmar-at-Bose speaks about the heat [1]

The PS1 does have fans, but they are only kicking in when you work the system pretty hard. The power amps are very efficient, and a nice side effect of high efficiency, is that there is a lot less heat to get rid off. So unless you are hitting it very hard, the fans will be off and at that kind of volume level, the fans are pretty much inaudible.

Leaving the system inside the bag is perfectly fine. The vents are above the mixer section and if the bag is open enough so you an insert any cables, than its also open enough to get appropriate ventilation.

If possible you should avoid exposing the PS1 (or any kind of electronics for that matter) to direct blazing sunlight. That can generate enormous amounts of heat inside the system to the point where it actually has to shut down (to protect some of the internal components). As a general rule, if it's too hot for you as the performer, than it's probably also too hot for the system. Finding a little shade will certainly help in a scenario like this.

Access Door / Flip Up Panel

Cliff-at-Bose talks about the door [2]

"I took my cover off right away and couldn't even tell you where it is right now. The carry bag for the PS1 seems to do a good job of keeping things clean in storage, the trunk, in transit. For the upper L1 section, turn it upside down, grab it by the bayonet, lower it into the bag and the bayonet should tuck into the top just fine.

No Sound

Look down the well - Thanks to Joseph for this one [3]

Set up my Bose as usual just before an early gig tonight and except for the sub-woofer, there wasn't any sound coming out from the line array when plugging in the guitar directly (without the usual PODxt Live in front of it).

Whool! I was definitely started to freak... I surely didn't want to pull my van around again and have to get out the Roland Keyboard back-up amp.

The anguish I was going through just imagining having to use anything other then the Bose was excruciating.. to think that I might have to play the next run of back to back gigs (five of 'em to be exact) without my baby Bose...:-(

Trouble shooting all possibilities, nothing-nada was happening ... no beauteous guitar sound whatsoever!...

The one thing I did notice however, was that the pole was wobbling just a tiny bit. Whenever I would take it apart and put it back together again, there seemed to be the slightest, almost imperceptible of wobbles.

Finally, after taking it apart and putting it back together again for the third time I looked into the power bass fitting and saw one of my picks lying there. Sure 'nuff... the pick was blocking the connection. This thin little pick was just enough to prevent the Bose from making full contact.

So be forewarned guitarists ... stray picks can be a threat to your total Bose sound fulfillment.

Battery Power

Hilmar-at-Bose tells use that battery power is not recommended [4]

A sufficiently sized generator will work with our system although the tend to be fairly noisy.

Car battery converters (so called "inverters") are a little problematic. Most inverters don't work well with our highly-efficient Switch Mode Power Supplies and need to be 2 to 3 times oversized. That draws really big amounts of current from the car battery and the wiring from the battery to the inverter needs to be able to handle that. This is by no means a trivial job, so we recommend against it.