Short Preamplifier enables acoustic testing in tight spaces.

Press Release Summary:

Supplied in 1.2 in. long housing, Model 426A07 converts high impedance signal from measurement microphone into low impedance signal. Unit can be paired with any PCB® ¼ in. free-field, random incidence and pressure microphone cartridges to test high frequencies ranging from human audible range of 20 Hz to 20 kHz up to ultrasonic frequencies greater than 100 kHz and high amplitude measurements past human threshold of pain, up to 194 dB.

Original Press Release:

Preamplifier for Acoustic Testing for Space Constrained Applications

PCB Piezotronics Introduces New Design, Ideal for Testing in Confined Spaces

Depew, New York – PCB Piezotronics introduces a new short preamplifier for test engineers and acoustic consultants taking measurements in spaces where traditional microphone systems won't fit or where space constraints are a concern.

This new preamplifier, Model 426A07, converts a high impedance signal from a measurement microphone into a low impedance signal. The preamplifier can be paired with any PCB® ¼" free-field, random incidence (diffuse field) and pressure microphone cartridges to test high frequencies ranging from the human audible range (20 Hz to 20 kHz) up to ultrasonic frequencies (greater than 100 kHz) and high amplitude measurements past the human threshold of pain (up to 194 dB).

Common test applications include space-constrained cavities, impedance tubes, under automotive and jet engines, transmission loss and absorption, and embedded into the walls of cavities and tubes.

The preamplifier electronics have been reduced to fit in a housing that is only 1.2" (29.5mm) in length and 1.5" (38.1mm) overall length when combined with any PCB® ¼" microphone cartridge. 

The  new  preamplifier is  competitively  priced, is in stock and available for immediate shipment.  For additional information please contact Mark Valentino, Product Manager, at (866) 816-8892 or via email at or visit

About PCB Piezotronics

PCB Piezotronics is a designer, manufacturer, and global supplier of accelerometers, microphones, and force, torque, load, strain, and pressure sensors, as well as the pioneer of ICP®  technology.  This instrumentation is used for test, measurement, monitoring, and control requirements in applications for automotive, aerospace, industrial, energy, R&D, military, educational, commercial, and OEMs.  Our Platinum Products are covered by a life-time warranty and are ready for immediate shipment.  With a customer support team of more than 30 Customer Service Representatives and Application Engineers, PCB® proudly stands behind their products with services that include a 24-hour technical support, a global distribution network, a best in class warranty and the industry's only commitment to Total Customer Satisfaction.  Visit us at

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