---
product_id: 67513049
title: "ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads"
brand: "protechtrader"
price: "₨498"
currency: SCR
in_stock: true
reviews_count: 13
category: "Pro Tech Trader"
url: https://www.desertcart.sc/products/67513049-protechtrader-piezoelectric-crystal-earphone-20k-ohm-bare-wire-leads
store_origin: SC
region: Seychelles
---

# 20KΩ ultra-high impedance No battery or amplifier needed 42-inch bare wire leads for DIY ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads

**Brand:** protechtrader
**Price:** ₨498
**Availability:** ✅ In Stock

## Summary

> 🎙️ Hear the past, build the future with ProTechTrader’s crystal-clear DIY earphone!

## Quick Answers

- **What is this?** ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads by protechtrader
- **How much does it cost?** ₨498 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/67513049-protechtrader-piezoelectric-crystal-earphone-20k-ohm-bare-wire-leads)

## 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

- • **Compact & Lightweight:** At just 0.22 ounces, this in-ear earphone fits discreetly and comfortably for extended listening sessions.
- • **Vintage Audio Revival:** Experience authentic crystal-clear sound powered solely by ambient radio waves—no batteries required.
- • **DIY-Ready Bare Wire Leads:** 42-inch tinned bare wire leads offer ultimate flexibility for custom soldering and seamless integration into your electronics builds.
- • **Ceramic Piezoelectric Driver:** Durable ceramic element delivers sensitive, noise-free audio reproduction across 200-8,000Hz frequency range.
- • **Precision High-Impedance Design:** 20,000 ohms impedance ensures optimal performance with crystal and transistor radios for true audiophile DIY projects.

## Overview

The ProTechTrader Piezoelectric Crystal Earphone features a 20K ohm high-impedance ceramic driver designed for crystal and transistor radio enthusiasts. With 42-inch tinned bare wire leads, it enables custom soldered connections without the need for batteries or external amplifiers. Lightweight and sensitive, it reproduces audio in the 200-8,000Hz range, making it ideal for vintage radio restoration and high-impedance electronics projects.

## Description

desertcart.com: ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads : 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 20K-ohm piezoelectric crystal earphone as the earpiece for high-impedance crystal radio receivers. The single beige ceramic earphone has tinned bare wire leads.
- Connect the tinned leads to a crystal radio circuit for unamplified listening, or use the earpiece in transistor radio restoration and other high-impedance electronics projects.
- The passive piezoelectric ceramic element works with weak high-impedance audio signals and needs no battery or external amplifier. Rated impedance is 20K ohms for radio projects.
- The 42-inch twisted wire ends in two tinned bare leads for DIY connections. This model has no 3.5mm plug, so plan a soldered or terminal connection before ordering the part.
- Model CH905 includes one wired in-ear earpiece for crystal radio construction and high-impedance circuit testing. The package contains no radio receiver or complete kit.

## 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 | #36,981 in Electronics ( See Top 100 in Electronics ) #2,015 in Earbud & In-Ear Headphones |
| 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 217 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 Ohms |
| Is Electric | Yes |
| Item Weight | 0.22 Ounces |
| Manufacturer | ProTechTrader |
| Model Name | Piezo-bare |
| Model Number | Piezo-bare |
| Noise Control | None |
| Number of Items | 1 |
| Specific Uses For Product | DIY Electronics Projects |
| UPC | 789048342869 |
| Unit Count | 1.0 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

![ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads - Image 1](https://m.media-amazon.com/images/I/61TseA8aIQL.jpg)
![ProTechTrader Piezoelectric Crystal Earphone 20K Ohm Bare Wire Leads - 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-08-08*