---
product_id: 389462307
title: "Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric"
brand: "protechtrader"
price: "AR$85190"
currency: ARS
in_stock: true
reviews_count: 5
category: "Pro Tech Trader"
url: https://www.desertcart.com.ar/products/389462307-piezoelectric-earphone-high-impedance-ceramic-earpiece-bare-wire-leads-transistor
store_origin: AR
region: Argentina
---

# 57dB sensitivity at 1kHz 20,000Ω ultra-high impedance 42-inch pre-tinned bare wire leads Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric

**Brand:** protechtrader
**Price:** AR$85190
**Availability:** ✅ In Stock

## Summary

> 🎙️ Hear the past, build the future with crystal-clear precision!

## Quick Answers

- **What is this?** Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric by protechtrader
- **How much does it cost?** AR$85190 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/389462307-piezoelectric-earphone-high-impedance-ceramic-earpiece-bare-wire-leads-transistor)

## Best For

- protechtrader enthusiasts

## Why This Product

- Trusted protechtrader brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** All-soldered connections and robust materials withstand lab experiments and long-term use.
- • **Broad Frequency Range:** Covers 200-8,000Hz to capture rich audio details from AM broadcasts to experimental signals.
- • **DIY-Ready Connectivity:** 42-inch twisted wire with pre-tinned bare leads ensures seamless integration into your custom electronics.
- • **Power-Efficient Sensitivity:** Hear the faintest signals with 57dB sensitivity—perfect for crystal and transistor radio DIY projects.
- • **Vintage Vibes, Modern Precision:** Classic ceramic piezoelectric design with a brass diaphragm for durability and crisp sound clarity.

## Overview

This Piezoelectric Earphone features a vintage ceramic design with a high 20,000 ohm impedance and 57dB sensitivity at 1kHz, making it ideal for crystal and transistor radio DIY projects. Equipped with 42-inch pre-tinned bare wire leads and a brass diaphragm, it delivers reliable, ultra-sensitive audio across a 200-8,000Hz frequency range. Perfect for electronics enthusiasts seeking authentic, power-efficient sound reproduction in their custom builds.

## Description

Ceramic earphone/Crystal earpiece for Transistor and Crystal Radios, Sensitive Electronics Projects, Lab research and other DIY experiments requiring a very sensitive high impedance earpiece. Piezoelectric earphones 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 smartphone. 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. Specifications: ▪ Impedance: 20K ohm ▪ Resistance: 20M ohm ▪ Capacitance: 15,000 pf ▪ Sensitivity: 57db at 1KHz ▪ Frequency Range: 200 - 8,000Hz ▪ Operation Temperature: -20 to 60 degree Celsius ▪ Wire: 42-inch Molded twisted Wire ▪ Connector: Tinned Leads for DIY Connections ***Please Note: These are the manufacturer specifications and may vary slightly in each production unit

Review: The voice of the CRYSTAL, still enchanting after 100 years - I build a lot of different types of radios and related stuff. Use these earphones on very basic crystal/fox hole type sets. OK price, decent sound and no issues with any of them. This radio is printed on a FLASH FORGE 3D printer (reviewed on desertcart), uses coil wire and a germanium diode also from desertcart. A good ground, a long enough antenna (both with the same coil wire as the coil) and you can listen to local AM broadcasts. No matter how many I make, it is always fun when the static softens and a voice or music is clear. And it is powered purely by the radio waves themselves.
Review: GOOD qualité - Écouteur à cristal (haute-impedance) pour project, três bonne qualité

## Features

- Perfect to make electronics projects like Crystal or Transistor Radios DIY Electronics Kits
- 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 pre-tinned bare wire connections (Also available with 3.5mm Aux Headphone Style Phono Connector - See B01JEOH3QQ)
- 2022 Updated Model Available (See B09MZML96L) Featuring All Soldered Connections and a Brass Diaphram for Increased reliability and life. PiezoElectric Crystal Earpiece for DIY Electronics Kits

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071JWPTT9 |
| Additional Features | High Sensitivity Vintage Style Ear Phone, Piezo Electric 20k ohm Impedance Ear Piece |
| Age Range Description | Adult |
| Audio Driver Type | Piezoelectric Driver |
| Best Sellers Rank | #109,233 in Electronics ( See Top 100 in Electronics ) #5,006 in In-Ear Headphones |
| Brand | ProTechTrader |
| Built-In Media | Piezoelectric Earphone with Bare Wire Leads for Crystaol Radios |
| Cable Features | Retractable |
| Color | (Beige - Bare Wire Leads) |
| Colour | (Beige - Bare Wire Leads) |
| Compatible Devices | Crystal Radios, Transistor Radios |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Customer Reviews | 4.5 out of 5 stars 209 Reviews |
| Ear placement | Over Ear |
| Earpiece Shape | in-ear |
| Enclosure Material | Ceramic |
| Form factor | In Ear |
| Frequency Range | 200 - 8,000Hz |
| Headphone Folding Features | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | Over Ear |
| Impedance | 20000 Ohms |
| Is Electric | Yes |
| Item Weight | 0.22 Ounces |
| Manufacturer | ProTechTrader |
| Model Name | Piezo-bare |
| Model Number | Piezo-bare |
| Noise Control | Sound Isolation |
| Noise control | Sound Isolation |
| Number of Items | 1 |
| Specific Uses For Product | DIY Electronics |
| UPC | 789048342869 |
| Unit Count | 1 Count |
| Wireless Technology | RF |

## Product Details

- **Brand:** ProTechTrader
- **Colour:** (Beige - Bare Wire Leads)
- **Ear placement:** Over Ear
- **Form factor:** In Ear
- **Impedance:** 20000 Ohms

## Images

![Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric - Image 1](https://m.media-amazon.com/images/I/61TseA8aIQL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The voice of the CRYSTAL, still enchanting after 100 years
*by C***0 on 13 April 2021*

I build a lot of different types of radios and related stuff. Use these earphones on very basic crystal/fox hole type sets. OK price, decent sound and no issues with any of them. This radio is printed on a FLASH FORGE 3D printer (reviewed on AMAZON), uses coil wire and a germanium diode also from AMAZON. A good ground, a long enough antenna (both with the same coil wire as the coil) and you can listen to local AM broadcasts. No matter how many I make, it is always fun when the static softens and a voice or music is clear. And it is powered purely by the radio waves themselves.

### ⭐⭐⭐⭐⭐ GOOD qualité
*by L***R on 20 October 2024*

Écouteur à cristal (haute-impedance) pour project, três bonne qualité

### ⭐⭐⭐⭐⭐ Äußerst empfindlicher hochohmiger Piezo-Ohrhörer
*by O***U on 4 July 2022*

Der Ohrhörer erfüllt 100%ig die Angaben des Herstellers; er funktioniert (korrekte Anpassung wohl vorausgesetzt) sehr gut. - Ich bedanke mich für diesen Artikel. Gruß o.thu

## Frequently Bought Together

- Piezoelectric Earphone High Impedance Ceramic Earpiece Bare Wire Leads Transistor Crystal Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity Vintage Classic Style Piezo Electric
- BOJACK 1N34A Germanium Diode 50 mA 65V Axial 1N34A 50 millimap 65 volt Electronic Diodes (Pack of 25)
- BNTECHGO 28 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0122" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.ar/products/389462307-piezoelectric-earphone-high-impedance-ceramic-earpiece-bare-wire-leads-transistor](https://www.desertcart.com.ar/products/389462307-piezoelectric-earphone-high-impedance-ceramic-earpiece-bare-wire-leads-transistor)

---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-09-20*