Instrument preamp for piezo pickups

BigAmp Piezo is a small sized high-quality FET instrument preamp which performs equally well on stage as it does in a studio environment. It has a 1/4" female jack input which accepts signals from piezo transducers.

BigAmp Piezo's low noise class A amplifier provides 3 dB of high-end amplification followed by a low impedance, balanced output buffer which reveals every detail and offers high-end sound quality. The output signal of your instrument will convert from an unbalanced to a balanced signal. 


Small form factor 

An extra benefit might be BigAmp Piezo’s small size, making it super portable. Bring your own high-quality DI everywhere. No hassle with batteries because BigAmp Piezo 's circuit is powered with phantom power. The small form factor combined with the ease of use makes that every touring musician should have a BigAmp Piezo in their case or gigbag.



A piezo 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 piezo transducer often sound uninspiring.

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

  • Low noise Class A FET amplifier
  • 3dB amplification
  • Female 1/4” TS jack input
  • Balanced XLR output
  • Lots of headroom
  • Frequency response 10Hz-100kHz (+/- 1dB)
  • Z-in 7.5 mΩ
  • Circuit is powered with 48V phantom power

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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.