---
product_id: 422748152
title: "Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)"
brand: "protechtrader"
price: "£12.74"
currency: GBP
in_stock: true
reviews_count: 8
category: "Pro Tech Trader"
url: https://www.desertcart.co.uk/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass
store_origin: GB
region: United Kingdom
---

# All soldered wire connections for ultimate reliability 57dB sensitivity across 200-8,000Hz frequency range 20,000Ω impedance for crystal-clear signal Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)

**Brand:** protechtrader
**Price:** £12.74
**Availability:** ✅ In Stock

## Summary

> 🎙️ Hear the future of DIY audio with precision and style!

## Quick Answers

- **What is this?** Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass) by protechtrader
- **How much does it cost?** £12.74 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass)

## 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

- • **Unmatched Connectivity:** All soldered joints eliminate dropouts and signal loss
- • **Versatile DIY Essential:** Ideal for crystal radios, transistor projects, and experimental audio setups
- • **Classic Yet Cutting-Edge:** Timeless design with modern black twisted wire and pre-tinned bare leads
- • **High Impedance Powerhouse:** 20,000 ohms impedance perfect for sensitive electronics projects
- • **Precision Brass Diaphragm:** Upgraded for superior sound clarity and durability

## Overview

The ProTechTrader Piezoelectric Crystal Earphone features an upgraded brass diaphragm and all soldered wire connections, delivering high 20,000 ohm impedance and 57dB sensitivity across a 200-8,000Hz frequency range. Designed for reliability and clarity, it’s the go-to earphone for crystal radios, transistor projects, and electronics enthusiasts seeking premium performance in a classic form factor.

## Description

desertcart.com: ProTechTrader Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios - Upgraded Brass Diaphragm with All Soldered Connections : Electronics

Review: ProTechTrader Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece - Excellent high impedance ear piece. Works very well with entry level crystal radio projects.
Review: This earphone works well - It works very well. Not real comfortable but in that regard, they’re all about the same. Spend an extra dollar or two. These earphones are pretty good. 👍🏻👍🏻

## Features

- Newly Designed Updated Model for 2022 - Featuring a Brass Diaphragm and All Soldered Wire Connections
- Redesigned to eliminate connectivity issues and increase reliability allowing you to make electronics projects like Crystal or Transistor Radios without concern for issues plaguing lower quality models
- 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
- New Black Wire Upgraded Piezoelectric Earphone with Classic style highly sensitive molded earpiece and 42-in twisted wire with pre-tinned bare wire connections

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09MZML96L |
| Additional Features | All Soldered Connections, Black wire with bare pre-tinned leads, Brass Diaphram |
| Age Range Description | Adult |
| Audio Driver Type | Piezoelectric Driver |
| Best Sellers Rank | #27,280 in Electronics ( See Top 100 in Electronics ) #1,626 in Earbud & In-Ear Headphones |
| Brand | ProTechTrader |
| Brand Name | ProTechTrader |
| Built-In Media | Earphone only |
| Cable Features | Without Cable |
| Color | Beige |
| Compatible Devices | DIY Electronics Kits, Crystal Radios, Transistor Sensitive Projects, Lab research, experiments |
| Connectivity Technology | Wired |
| Control Method | Remote |
| Customer Reviews | 4.4 out of 5 stars 71 Reviews |
| Ear Placement | In Ear |
| Earpiece Shape | Rounded Tip |
| Enclosure Material | Metal |
| Form Factor | In Ear |
| Frequency Range | 200 to 8,000 Hz |
| Frequency Response | 8000 Hz |
| Headphone Folding Features | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | In Ear |
| Impedance | 20000 Ohms |
| Is Autographed | No |
| Item Weight | 0.01 Kilograms |
| Manufacturer | ProTechTrader |
| Model Name | Piezo-Brass-Black-Bare |
| Model Number | Piezo-Brass-Black-Bare |
| Noise Control | None |
| Number of Items | 1 |
| Sensitivity | 57 dB |
| Style Name | Brass Black Wire |
| UPC | 789048343323 |
| Unit Count | 1.0 Count |
| Warranty Description | 90 Days |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** ProTechTrader
- **Color:** Beige
- **Ear Placement:** In Ear
- **Form Factor:** In Ear
- **Impedance:** 20000 Ohms

## Images

![Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass) - Image 1](https://m.media-amazon.com/images/I/51rVQMARP1L.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ ProTechTrader Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece
*by J***O on February 1, 2026*

Excellent high impedance ear piece. Works very well with entry level crystal radio projects.

### ⭐⭐⭐⭐⭐ This earphone works well
*by A***R on December 1, 2025*

It works very well. Not real comfortable but in that regard, they’re all about the same. Spend an extra dollar or two. These earphones are pretty good. 👍🏻👍🏻

### ⭐⭐⭐⭐⭐ Worked for my WWII foxhole radio build.
*by B***E on December 6, 2025*

Bought this for a “foxhole radio” I was building as a demonstration for radio classes. Allowed me to heard radio signals picked up on a wire with zero power put into the system, just the tiny bit of energy picked up by a 30’ wire and run through a handmade coil and a razor blade.

## Frequently Bought Together

- Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios - Upgraded Brass Diaphram with All Soldered Connections
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**Shop now:** [https://www.desertcart.co.uk/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass](https://www.desertcart.co.uk/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-29*