Original Schaller gold-contact 5-way Megaswitch for outstanding signal flow and switching options The mono and stereo switching positions 2, 3 and 5 feature identical controls and switching functions for user-friendly layout.Īdvanced class A circuitry for sweet,transparent soundĪttractive and protective casing with see-through window (2) when playing live use this option for silently changing instrumentsģ-Way rotary switch Switching Options in Mono- and Stereo-Mode: (1) for reference purposes use this option to hear the raw piezo signal Pos 5 magnetic pickups pure and unaltered (hardwire-bypass) Pos 4 magnetic pickups into FlagShip preamp (buffered) Pos 3 magnetic pickups and piezo signal into FlagShip preamp Pos 1 mono: piezo raw-mode (1) / stereo: mute, silent-mode (2) Pos 1 Mono and Pos 1 Stereo feature special utility settings. Mono and stereo positions 2 through 5 feature identical controls and functions allowing for a transparent layout and easy handling. In addition the FlagShip preamp offers an ultra-silent operation with a signal to noise-ratio of -115dB and a noise floor of just 20 dBV while Schaller‘s own FlagShip gold-contact 5-way Megaswitch lets you choose from a vast variety of piezo and magnetic switching-options and –combinations never seen in any preamp before.ĥ-Way Megaswitch Switching Options in Mono- and in Stereo-Mode: With a true bandwidth of 1Hz to 20kHz at +/- 0 dB our state-of-the-art FlagShip circuitry provides unprecedented signal fidelity along with exceptional operational convenience.Īnd because of FlagShip‘s leading-edge Rail to Rail technology a single 9V alcaline battery will provide you with 1.000+ hours of play time.Įnjoy a self-sensing circuitry automatically switching in mono- or stereo-operation respectively by sensing which kind of chord you plugged in. Clear smooth highs, soulful mids and bodacious bass combined with an impressive dynamic range of 115dB will lead your inspiration to new levels. With this new and groundbreaking Class A preamp your music has never sounded better. Flagship - Sounds you never thought possible You can also look for ideas at "acoustic" amplifiers like the Fender Acoustasonic, Trace Elliot, etc. If it's built into the guitar, you can use a stereo mini jack to plug a little electret mic). a microfone input that you can mix to the piezo (if it's an outboard preamp you may consider a xlr input, phantom power, etc. a polarity ("phase") switch can help killing unwanted feedback (a variable notch eq can also help). Some other useful features for a piezo preamp: From my experience with piezo preamps the keys are: You don't need all the features and a lot could be simplified. I think it's good to take a look what is happening inside a professional piezo pre. The circuit around Z4 is a tunable 10-250Hz highpass filter. It cuts out the low freq band which is not useful and contains some low f noises like rumbles generated while playing the guitar. Another very useful thing is a switchable highpass filter, typically around 75-80Hz 12dB/oct. EQ - i think it's good to have an ability to set the flat response, so i'd use baxandall od gyrator based circuits.Ĥ. More headroom, we don't want the piezo signal to be clipped. The Ap13 combines the high input Z with a wide gain range (~9dB - 60dB).Ģ. You could also use a jfet stage or bootstrapped stage for high input Z. As already mentioned, a high input impedance. From my experience with piezo preamps the keys are:ġ.
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