Preamp for piëzo transducers

BigAmp Piëzo is a small sized, high quality jfet instrument preamp which performs equally well on stage as it does in a studio environment. It has a 1/4" female jack input. BigAmp's low noise class A amplifier provides high end amplification and converts the instrument output signal from unbalanced to balanced.

A piëzo transducer typically has an impedance of several Mega Ohms, which is much higher compared to the high-Z input of instrument preamps or mixing consoles. This prevents the transducer to deliver its potential output signal to the preamp and restricts transient response. Additionally, the high impedance combined with the capacity of the cable to the preamp forms a low pass filter, making a piëzo transducer often sound uninspiring.

BigAmp Piëzo is a BigAmp version specially designed to overcome above issues. It has a 7.5 Mega Ohms input Impedance, which enables the piëzo transducer to deliver its full potential. Signal amplification is low (3dB) to allow for the highest possible headroom. Because of its small size BigAmp piëzo can be connected as close to the transducer as possible which keeps cable capacitance to a minimum.

Bring your own high quality DI everywhere. No hassle with batteries because BigAmp's circuit is powered with 24v/48v phantom power. The small form factor combined with the ease of use makes that every touring musician should have a BigAmp in their case or gigbag.






  • Input impedance: 7.5MOhm
  • Low noise Class A JFet amplifier
  • 24-48 v phantom power
  • 3db amplification
  • Balanced output

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User product reviews

Thank you very much for your superb service, the BigAmp Piëzo arrived this morning (in just 2 days).
All the best, Steve

Hope you are doing well. We love the BigAMP Piëzo!

OnE MiC and a BigAmp
OnE MiC and a BigAmp, CHECK IT OUT!

The BigAmp arrived a few days ago. Works great. Thank you very much!

We tested the bigamp againt a countryman di, and with a blind test, the bassplayer and tech liked the bigamp better!!!! So a order of 2 of them is now made :-) Just wanted you to know that, the thing you have made is really good!!!!!!
best, Creg

hallo, ik heb de Bigamp nu eens flink aan de tand gevoeld. Deze klinkt echt helemaal fantastisch. headroom is echt zeer goed en hij wordt niet zo agressief als men "flink tekeergaat". mooi ding!
groeten, Mike

Thanks, it was in my mailbox the second or third day after the order. I'm super pleased with this BigAmp as well as my FetHead. The BigAmp is responsive and quiet, so I'm gonna get more of both for sure! Swiss army problem solvers for the studio, noise floor just drops so much, Thanks, Eirik space...


"How much mA P48 does the BigAmp Piezo need?"

The BigAmp Piezo consumes 3,5 mA

"How much is the signal amplification of the BigAmp Piezo?"

The signal amplification is low (3dB) to allow for the highest possible headroom.