---
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: "₩31284"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/85421519-protechtrader-piezoelectric-earphones-crystal-ceramic-earpiece-high-impedance-for-transistor
store_origin: KR
region: South Korea
---

# 15,000 pF Capacitance Classic Molded Earpiece 20k Ohm Sensitivity 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:** ₩31284
**Availability:** ✅ In Stock

## Summary

> 🎶 Tune into Innovation with ProTechTrader!

## 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?** ₩31284 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/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

- • **High Impedance Power:** Experience superior sound with a remarkable 20,000 ohm impedance.
- • **Versatile Connectivity:** Pre-tinned bare wire connections for seamless project assembly.
- • **Sensitive Sound Quality:** Enjoy clear audio with a rated sensitivity of 57dB at 1kHz.
- • **Unleash Your Creativity:** Perfect for DIY electronics projects, from crystal radios to custom audio setups.
- • **Classic Design Meets Modern Tech:** Timeless molded earpiece design with a 42-inch twisted wire for easy integration.

## Overview

The ProTechTrader Piezoelectric Earphones are designed for DIY enthusiasts and electronics projects, featuring a high impedance of 20,000 ohms, a capacitance of 15,000 pF, and a classic molded earpiece for optimal sound quality. Perfect for building crystal or transistor radios, these earphones come with a 42-inch twisted wire and pre-tinned bare wire connections for easy use.

## 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 |
|---------------|-------|
| Control Method | Touch |
| Unit Count | 1.0 Count |
| Item Weight | 0.22 Ounces |
| Is Electric | Yes |
| Cable Features | Retractable |
| Additional Features | Piezo Electric 20k ohm Impedance Ear Piece, High Sensitivity Vintage Style Ear Phone |
| Enclosure Material | ceramic |
| Headphone Folding Features | In Ear |
| Headphones Ear Placement | In Ear |
| Color | (Beige - Bare Wire Leads) |
| Wireless Technology | RF |
| Connectivity Technology | Wired |
| Headphone Jack | 3.5 mm Jack |
| Impedance | 20000 Ohm |
| Noise Control | None |

## Product Details

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

## 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)

## 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 South Korea*
*Store origin: KR*
*Last updated: 2026-02-28*