The P1 is extremely similar to one of our all-time studio mic preamp favorites, the A Designs Pacifica, a dedicated 2-channel mic preamp with internal power supply. While we own three Pacificas in our studio, we elected not to add the P1 to our rack as they are simply too similar. Although the P1 has a smaller custom wound transformer as compared to the Pacifica, A Designs went to great lengths to have the P1 and Pacifica share the same tone.  What you can expect is exceptional detail, an open and airy sound that also has a touch of color.  Overall a remarkably musical preamp design that seems to be an excellent choice on just about anything.  The top end is particularly beautiful, and tends to smooth out even some of the harshest microphones. We love this preamp for all manor of stringed instruments as the clarity is simply stunning, but it is perfect as an “all around preamp” as it gets used on Vocals, guitar cabs, drums and just about everywhere else in the studio.  If you want to talk to us about the more subtle details of the P1 vs. the Pacifica, please let us know.  Read for more info on some of the other available modules if this one doesn’t sound exactly right for your application.   The Rest of the EM Preamp Cards The full line of EM Preamp cards from A Designs were built to bring a few different flavors into your 500 series rack, but built with an extreme quality standard that is only possible with small quantity, boutique runs which guarantee each module is built to world-class audio standards.  Each module has custom wound transformers which really create a noticeable difference in tone, and to be honest, the difference is quite impressive compared to many of the modules available on the market today from other manufacturers.  Each module has a plenty of gain for your quieter sources like acoustic guitar as well as traditionally quieter microphones like ribbons.  The front panel DI sits prior to the input transformer which allows you to pickup that great coloration that each of the modules individually presents, even when patching in an instrument. The preamp modules from the A-Designs series are the: P1, EM Red, EM Silver, EM Blue and EM Gold.   With the exception of the P-1 (Since we own 3x Pacificas), Sound Pure owns pairs of EVERY SINGLE module above, and use them daily in our own world-class recording studio, the Sound Pure Studios.  We are here to report our findings after years of using them, and you should know any question you have can be e-mailed to us, or you call us toll free, we’d love to talk to you more about these modules, microphone pairings, comparing these to other pres on the market, and whether or not they are right for you.    What We Think Of The Others The P1 is modeled to be very similar to the Pacifica, with some moderate color and some very nice detail throughout the frequency range, with a very smooth and open top end.  The Red module has a “boost” to the mids due to the transformer, which we found to be wonderful on guitar cabs.  The Silver boasts a steel output transformer that gives it the darkest tone of the bunch (and a big low end), and the Blue with its Nickel transformer has a very lofty, airy top end that is great for bringing a brighter life into darker sources.  Finally the Gold is a mixture of the Red (Input Transformer) and Silver (output transformer), which gives it the hottest output with a nice colored and pushed midrange.