While I have never used the DriveRack PX, I absolutely love the DriveRack PA. I have used it for several years with very good results.

The PX is relatively new and is designed specifically for use with powered speakers and the PA is more of a general purpose unit for powered or nonpowered speakers alike.

I use my unit everywhere that I set up my system. The automatic EQing is great.

You simply place the RTA reference mic in the audience area and the DriveRack will sound pink noise through the speakers and the mic will send the resulting sound back to the unit. The RTA function (Real Time Analyzer) will then do a spectrum analysis on the sound comparing it back to the original reference tone. It then proceeds to adjust the EQ until it gets as close as possible to the target curve.

I get great sound everytime and no feedback.
The PA also includes a crossover for using with a Subwoofer. You can set the frequency range for 3 different outputs (highs, mids,and lows) to use with Bi-amped or Tri-amped systems.

It also includes Feedback eliminator with 12 notch filters that can be set as fixed or live filters. These can reduce problem frequencies in a room.

Delay is also included as is sub-harmonic sythesis for adding to the bottom end.

Frankieve, did you have a DriveRack PX or a DriveRack PA? I would be interested in hearing more about how the actual PX version works.

Chony, which version do you have?

There is also the 260, 480, 4800 and several other models that are a bit more complicated.

I also have a Behringer UltraCurve DEQ2496 that is an RTA also, but I currently am not using it as it lacks some of the features of the DBX and has a higher noise floor.

Anyone remember the Peavey Autograph? It was a similar device back in the day. LOL


Richard