---
product_id: 85421519
title: "ProTechTrader Piezoelectric Earphones (Crystal/Ceramic Earpiece) High Impedance for Transistor Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity (Beige-Wire (bare))"
brand: "protechtrader"
price: "58040CFA"
currency: XOF
in_stock: true
url: https://www.desertcart.sn/products/85421519-protechtrader-piezoelectric-earphones-crystal-ceramic-earpiece-high-impedance-for-transistor
store_origin: SN
region: Senegal
---

# 57dB sensitivity at 1kHz 20,000Ω ultra-high impedance 42-inch twisted bare wire for DIY ProTechTrader Piezoelectric Earphones (Crystal/Ceramic Earpiece) High Impedance for Transistor Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity (Beige-Wire (bare))

**Brand:** protechtrader
**Price:** 58040CFA
**Availability:** ✅ In Stock

## Summary

> 🎙️ Elevate your DIY audio game with crystal-clear precision!

## Quick Answers

- **What is this?** ProTechTrader Piezoelectric Earphones (Crystal/Ceramic Earpiece) High Impedance for Transistor Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity (Beige-Wire (bare)) by protechtrader
- **How much does it cost?** 58040CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/85421519-protechtrader-piezoelectric-earphones-crystal-ceramic-earpiece-high-impedance-for-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

- • **DIY-Ready Design:** 42-inch pre-tinned bare wire leads make custom connections effortless for your next electronics project.
- • **Ultra-High Impedance:** 20,000 ohms impedance ensures compatibility with vintage and DIY transistor radios, delivering pure, distortion-free sound.
- • **Broad Frequency Range:** Crisp audio clarity from 200Hz to 8,000Hz covers all essential frequencies for experimental and hobbyist use.
- • **Classic Ceramic Build:** Durable ceramic earpiece combines retro style with modern precision for authentic crystal radio experiences.
- • **Unmatched Sensitivity:** Hear the faintest signals with 57dB sensitivity—perfect for crystal radios and delicate electronics.

## Overview

The ProTechTrader Piezoelectric Earphones feature a high 20,000 ohm impedance and 57dB sensitivity, designed specifically for crystal and transistor radios as well as DIY electronics projects. With a durable ceramic earpiece and 42-inch twisted bare wire leads, these earphones deliver ultra-sensitive, distortion-free sound across a wide frequency range (200-8,000Hz), making them the go-to choice for hobbyists and professionals seeking authentic, high-impedance audio solutions.

## 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 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. 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

## Features

- 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 pre-tinned bare wire connections
- Classic PiezoElectric Crystal Earpiece for DIY Electronics Kits

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071JWPTT9 |
| Age Range Description | Adult |
| Audio Driver Type | Piezoelectric Driver |
| Best Sellers Rank | 8,122 in In-Ear Headphones |
| Box Contents | Piezoelectric Earphone with Bare Wire Leads for Crystaol Radios |
| Brand Name | ProTechTrader |
| Cable Features | Detachable |
| Colour | Beige-Wire (bare) |
| Compatible Devices | Transistor Radios, DIY Electronics Kits |
| Control Method | Touch |
| Customer Reviews | 4.5 4.5 out of 5 stars (205) |
| Earpiece Shape | In Ear |
| Enclosure Material | ceramic |
| Frequency Range | 200 - 8,000 Hz |
| Headphone Form Factor | In Ear |
| Headphone Jack | 2.5 mm Jack |
| Headphones Ear Placement | In Ear |
| Impedance | 20 Ohms |
| Is Electric | Yes |
| Item Weight | 0.22 Ounces |
| Manufacturer | ProTechTrader |
| Model Name | Piezo-bare |
| Model Number | Piezo-bare |
| Network Connectivity Technology | Wired |
| Noise Control | Sound Isolation |
| Number of Items | 1 |
| Product Features | Lightweight |
| Sensitivity | 57 dB |
| Specific Uses For Product | DIY Electronics |
| Style Name | In the ear |
| UPC | 789048342869 |
| Unit Count | 1.0 count |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | RF |

## Product Details

- **Brand:** ProTechTrader
- **Colour:** Beige-Wire (bare)
- **Connectivity technology:** Wired
- **Ear placement:** In Ear
- **Form factor:** In Ear
- **Headphone jack:** 2.5 mm Jack
- **Impedance:** 20 Ohms
- **Model name:** Piezo-bare
- **Noise control:** Sound Isolation
- **Sensitivity:** 57 dB

## Images

![ProTechTrader Piezoelectric Earphones (Crystal/Ceramic Earpiece) High Impedance for Transistor Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity (Beige-Wire (bare)) - Image 1](https://m.media-amazon.com/images/I/61TseA8aIQL.jpg)
![ProTechTrader Piezoelectric Earphones (Crystal/Ceramic Earpiece) High Impedance for Transistor Radios & DIY Make Electronics Projects 20,000 (20k) Ohm Sensitivity (Beige-Wire (bare)) - Image 2](https://m.media-amazon.com/images/I/51+-2fi9dmL.jpg)

## 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
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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-07-06*