$12^.99

Free 30-day Returns

Limit 99999 per customer.

Sold by ProTechTrader

Shipped by ProTechTrader

Price alert

Add to Wish List

Meet Your Seller

ProTechTrader

See Seller Store

Main image of Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios with 3.5mm (1/8in) Audio Jack - Upgraded Brass Diaphram with All Soldered Connections

Visit ProTechTrader Store

Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios with 3.5mm (1/8in) Audio Jack - Upgraded Brass Diaphram with All Soldered Connections

Be the first to review this product...

Newly Designed Updated Model for 2022 - Featuring a Brass Diaphragm and All Soldered Wire Connections
Redesigned to eliminate connectivity issues and increase reliability allowing you to make electronics projects like Crystal or Transistor Radios without concern for issues plaguing lower quality models
High 20,000 ohm impedance with resistance over 20 million ohms and a capacitance of 15,000 pf
Rated Sensitivity of 57db at 1KHz in the frequency range from 200 to 8,000Hz
New Black Wire Upgraded Piezoelectric Earphone with Classic style highly sensitive molded earpiece and 42-in twisted wire with 3.5mm (1/8in) audio jack

Overview

Specs

Reviews

Any questions? Our AI mode will help you find out quickly.

Try me now

ProTechTrader

ProTechTrader is a small family business dedicated to our mission on electronics: to teach and provide.

We are dedicated to teaching the basics of electronics through resources and service! Our journey as a small business has continued for over a decade. We owe much of our success to Mr. Charles Platt and his wonderful book series “Make: Electronics” and its counterparts. We are proud to work alongside Mr. Platt to provide component kits to complete the experiments in his books, just the way he wanted!
Make: Electronics 3rd Ed Kits
Are your Make: Electronics kits official?

Yes! ProTechTrader is the official recommended supplier for Make: Electronics kits by Charles Platt. We work directly with the author to ensure our component packs contain the correct parts for each experiment in his books.

What makes our products unique?

We are the only official kit supplier for Make: Electronics, Make: Easy Electronics, Make: Radio, and Make: More Electronics Kits!

Why do we love what we do?

Rounding up every necessary component can be time-consuming and overwhelming. We've done all the shopping for you so you can hit the ground running!

ProTechTrader

ProTechTrader is a small family business dedicated to our mission on electronics: to teach and provide.

We are dedicated to teaching the basics of electronics through resources and service! Our journey as a small business has continued for over a decade. We owe much of our success to Mr. Charles Platt and his wonderful book series “Make: Electronics” and its counterparts. We are proud to work alongside Mr. Platt to provide component kits to complete the experiments in his books, just the way he wanted!
Make: Electronics 3rd Ed Kits
Are your Make: Electronics kits official?

Yes! ProTechTrader is the official recommended supplier for Make: Electronics kits by Charles Platt. We work directly with the author to ensure our component packs contain the correct parts for each experiment in his books.

What makes our products unique?

We are the only official kit supplier for Make: Electronics, Make: Easy Electronics, Make: Radio, and Make: More Electronics Kits!

Why do we love what we do?

Rounding up every necessary component can be time-consuming and overwhelming. We've done all the shopping for you so you can hit the ground running!

***Newly Designed Updated Model for 2023***
Brass Diaphragm and ALL soldered wire connections for improved connectivity and reliability

Redesigned to eliminate issues previously found in many piezoelectric earphones Tin Diaphram has been Upgraded to Brass
Conductive Glue (used on lower models) has been replaced with all soldered connections Black Wire is Specific to the upgraded 2023 version

Perfect to make electronics projects like Crystal or Transistor Radios
High 20,000 ohm impedance with resistance over 20 million ohms and a capacitance of 15,000 pf
Rated Sensitivity of 57db at 1KHz in the frequency range from 200 to 8,000Hz
Classic style highly sensitive molded earpiece with 42-in twisted wire with 3.5mm (1/8in) audio jack
Classic PiezoElectric Crystal Earpiece for DIY Electronics Kits

Ceramic Earphone Crystal Ear Piece for Transistor and Crystal Radios, Sensitive Electronics Projects, Lab research and other DIY experiments requiring a very sensitive high impedance earpiece.

Piezoelectric earphones are also known as crystal earphones, ceramic earphone, and piezo earpieces are the most sensitive earphones. They are in fact many times more sensitive than even the most sensitive magnetic earphones, dynamic earphones, or electrostatic earphones that you may use on your iPod or iPhone. Sensitive earphones have a very high impedance, which is measured in ohms and should not be used directly with a modern amplified radio. Crystal Earphones are so sensitive and require so little power to operate that you can hear a small 'click' just by touching the two bare leads together.

Crystal radios will not work with modern earphones or 'earbuds' as they are designed to operate with amplified audio sources found in today's electronic devices. Crystal Earphones are used in the construction of the crystal radio and in some science experiments such as listening to electric fish.

Product information

Brand	ProTechTrader
Color	Beige
Ear Placement	In Ear
Form Factor	In Ear
Impedance	20000 Ohm
Noise Control	None
Sensitivity	57 dB
Headphones Jack	3.5 mm Jack
Model Name	Piezo-Brass-Black-3.5mm
Connectivity Technology	Wired
Included Components	Earphone
Age Range (Description)	Adult
Material	Brass
Specific Uses For Product	DIY Electronics, Crystal Radios
Compatible Devices	Laptops, Desktops, Tablets, Telephones, Smart Speakers, Televisions, Car Audio Systems, Cellphones
Cable Feature	Retractable
Item Weight	0.06 Kilograms
Water Resistance Level	Not Water Resistant
Frequency Range	200Hz - 8000Hz
Unit Count	1.0 Count
Style	Brass Black Wire
Control Method	Touch
Number of Items	1
Audio Driver Type	Piezoelectric Driver
Earpiece Shape	In-Ear

Additional Information
First Listed on Newegg	October 28, 2025

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
CONTACT

Return Policies

Return for refund within: 30 days
Return for replacement within: non-replaceable
This item is covered by ProTechTrader Return Policy

Manufacturer Contact Info

For a directory of all our manufacturers, please click below.
Manufacturers Directory

Item#: 9SIC3HPKMW2574

Meet Your Seller

Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios with 3.5mm (1/8in) Audio Jack - Upgraded Brass Diaphram with All Soldered Connections

ProTechTrader

Make: Electronics 3rd Ed Kits

Are your Make: Electronics kits official?

What makes our products unique?

Why do we love what we do?

ProTechTrader

Make: Electronics 3rd Ed Kits

Are your Make: Electronics kits official?

What makes our products unique?

Why do we love what we do?

Product information

Learn more about the Detailed Specifications

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info