Griffin PowerMate mini-review

Well, there it is, nestled between my keyboard, trackpad, Superdrive and my 27″ Cinema Display stand.

What the hell is it? Well, it’s a knob.  A USB knob.  And, it’s good looking too.  It blends in quite well with the rest of my Apple gear.  And, the AppleScript configurable blue light is an added bonus.

I purchased the PowerMate to solve two problems.  The first and foremost was that I needed wanted an easier way to change the volume on my Mac.  When I watch video or participate in a video chat, I tend to lean back in my Herman Miller Aeron to watch and listen.  Often I have to change the volume.  I can either use my trackpad to adjust the volume via the menu bar volume control or I can use the volume controls on my keyboard.  Neither are acceptable options.  Having to move my mouse away from where I left it (in a place relative to the task at hand) just to adjust the volume and then risk losing it (remember I have a 27″ display) could cost me milliseconds in recovery time.  The keyboard option is out because I use a number of apps that require the use of F1-F12.  I switched F1-F12 to be the primary relegating the OS/X control functions for brightness, media control, and volume to be secondary.  Because the volume controls are assigned to F10-F12 pressing fn F10-F12 is a two handed operation–even for my large mitts.

The second problem was (and is) that I needed a spinner for certain retro games.  This problem is still unsolved.  As good looking and capable as the PowerMate is, it’s no spinner.  The PowerMate can be configured to perform just about any action, e.g. mouse right, scroll down, keyboard left, etc… and it can be configured on a global and per application basis.  Since most retro emulators will use the mouse or keyboard arrow keys as a spinner/paddle surrogate, then this should be easy.

My first test was with Tempest running under MAME OS X.  I tried mouse and keyboard emulation–nothing.  Oddly my Magic Trackpad did not register either, whereas a real USB mouse and my MacBook Air trackpad did.  Keyboard emulation should certainly work.  Nope.  Clearly MAME OS X and the PowerMate are using different methods for I/O.  Before giving up completely I thought I’d try StellaOSX.  Stella is the most popular Atari 2600 emulator (and was the code name for the 2600).  I loaded up the 1978 version of Breakout (which BTW, was designed by Steve Jobs (but really Woz) in the mid ’70s when Steve was an Atari employee–read the (a) story here:


Well, sort of.  It did work in both keyboard and mouse emulation modes, but it was a bit difficult to use.  And, after many tuning attempts it still didn’t feel natural.  One commenter I found via Google stated that it sucked as a gaming device because it was digital and not analog.  Another definceny with the PowerMate for gaming is that it will not spin freely.  There is a friction ring inside the dome to keep it from spinning.  It can be removed, but then the dome is not stable.  Others have reported some success with the PowerMate as a spinner on Windows, perhaps I just have to try harder.

In summary, the PowerMate was really designed as a multimedia control knob and it does that very well.  Scrolling through movie clips or adjusting volume is very smooth and natural.  But, it does disappoint as a spinner/paddle for gaming.  I had a few other minor issues:

  • Static Shock.  I live at 5000 ft in a desert climate, it’s dry here and it’s easy to shock things.  The PowerMate is a static shock magnet.  Even the slightest shock will shut it down.  The blue light goes dead and I have to unplug and replug it in to reset it.
  • The build quality is not Apple, but close.  It could use a bit more weight.

On the plus side:

  • The software is easy to use (I didn’t have to read anything).
  • The software comes preconfigured and ready to go for all the popular apps.
  • The knob supports 4 events:  Spin right/left, press down, press down and hold.  All 4 can be assigned to different actions.  E.g. my default for any app is volume up/down and mute for a short click.  However for QuickTime the short click is used for pause.
  • You can use modifier keys with any of the actions.  E.g. shift right, ctrl click, etc…  This gives you much more than 4 definable actions.
  • It’s low profile and really does look great.  Other spinners for games are quite large.

You can get more info here  List price is $45 US.  I got mine from Amazon for $35 with free shipping.


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