---
product_id: 67513049
title: "Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio"
brand: "protechtrader"
price: "93.30 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Pro Tech Trader"
url: https://www.desertcart.tn/products/67513049-piezoelectric-crystal-earphone-20k-ohm-bare-wire-leads-for-crystal
store_origin: TN
region: Tunisia
---

# 20KΩ ultra-high impedance Passive piezoelectric driver, no battery needed 42-inch bare wire leads for flexible DIY Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio

**Brand:** protechtrader
**Price:** 93.30 DT
**Availability:** ✅ In Stock

## Summary

> 🎙️ Hear the Past, Power Your Future with Pure Crystal Sound

## Quick Answers

- **What is this?** Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio by protechtrader
- **How much does it cost?** 93.30 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/67513049-piezoelectric-crystal-earphone-20k-ohm-bare-wire-leads-for-crystal)

## 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 Freedom Unleashed:** 42-inch twisted bare wire leads give you ultimate flexibility for soldering or terminal connections—customize your project without limits.
- • **Pure Signal, Zero Batteries:** Passive piezoelectric technology converts weak radio waves into clear audio—no external power or amplifier required.
- • **Crafted for the True Tinkerers:** Ceramic in-ear design ensures sound isolation and durability, ideal for restoration, signal tracing, or experimental radios.
- • **Vintage Vibes, Modern Precision:** Experience authentic crystal radio sound with a 20,000-ohm impedance that perfectly matches your high-sensitivity setups.
- • **Join the Legacy of Radio Pioneers:** Trusted by enthusiasts worldwide, this earphone revives the magic of crystal sets—don’t miss out on the timeless listening experience.

## Overview

The ProTechTrader CH905 Piezoelectric Crystal Earphone features a high-impedance 20K-ohm ceramic driver with 42-inch bare wire leads, designed specifically for crystal radios and DIY electronics. It passively converts weak radio signals into clear audio without batteries or amplifiers, making it perfect for vintage radio restoration, signal tracing, and energy harvesting projects. Lightweight and durable, this earphone offers authentic sound isolation and flexible connectivity for professional hobbyists and radio pioneers alike.

## Description

desertcart.com: Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio : Electronics

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: Used it in a energy harvesting system - Works even with an energy harvesting system

## Features

- Use this ProTechTrader CH905 piezoelectric crystal earphone with a high-impedance crystal radio receiver. Two tinned bare leads connect the single ceramic earpiece to a solder point or terminal.
- The passive element turns weak audio signals into sound without a battery or external amplifier. Use the earpiece for crystal set listening, transistor radio restoration, or signal tracing.
- A 42-inch twisted cable gives you room at the bench and suits soldered or terminal connections. Compare the 20K-ohm rating with the required load before connecting it.
- The package contains one beige earpiece without a 3.5mm plug or adapter. Supply the radio, project parts, and any extra connection hardware.
- Choose this wired earphone for DIY electronics when a standard low-impedance headphone loads the circuit. Check your receiver design, terminal method, and available cable path before installation.

## 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 | #353,171 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #342 in Lab ESD Supplies |
| Brand | ProTechTrader |
| Brand Name | ProTechTrader |
| Built-In Media | Piezoelectric Earphone with Bare Wire Leads for Crystaol Radios |
| Cable Features | Retractable |
| Color | (Beige - Bare Wire Leads) |
| Compatible Devices | Crystal Radios, Transistor Radios |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Customer Reviews | 4.6 out of 5 stars 220 Reviews |
| Ear Placement | In 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 | In Ear |
| Impedance | 20000 ohm |
| Item Weight | 6.26 g |
| Manufacturer | ProTechTrader |
| Model Name | Piezo-bare |
| Model Number | Piezo-bare |
| Noise Control | Sound Isolation |
| Number of Items | 1 |
| Specific Uses For Product | DIY Electronics Projects |
| UPC | 789048342869 |
| Unit Count | 1 Count |
| Warranty Description | 1 Year |
| Wireless Technology | RF |

## Product Details

- **Brand:** ProTechTrader
- **Color:** (Beige - Bare Wire Leads)
- **Ear Placement:** In Ear
- **Form Factor:** In Ear
- **Impedance:** 20000 Ohms

## Images

![Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio - Image 1](https://m.media-amazon.com/images/I/61TseA8aIQL.jpg)
![Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads for Crystal Radio - Image 2](https://m.media-amazon.com/images/I/51+-2fi9dmL.jpg)

## Customer Reviews

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

### ⭐⭐⭐⭐⭐ Used it in a energy harvesting system
*by A***R on April 23, 2026*

Works even with an energy harvesting system

### ⭐⭐⭐⭐⭐ Great product
*by P***N on March 29, 2026*

Good classic design, quality construction, great price

## 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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- 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

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---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-21*