---
product_id: 422748152
title: "Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)"
brand: "protechtrader"
price: "€ 21.90"
currency: EUR
in_stock: true
reviews_count: 13
category: "Pro Tech Trader"
url: https://www.desertcart.pt/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass
store_origin: PT
region: Portugal
---

# 20,000Ω High Impedance 57dB Sensitivity @1kHz All Soldered Connections Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)

**Brand:** protechtrader
**Price:** € 21.90
**Availability:** ✅ In Stock

## Summary

> 🎙️ Elevate your DIY radio game with precision and reliability!

## Quick Answers

- **What is this?** Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass) by protechtrader
- **How much does it cost?** € 21.90 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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

- • **Wide Frequency Range:** 200–8,000 Hz coverage ensures crisp audio fidelity for all your experimental needs.
- • **Reliable Soldered Wiring:** Eliminates connectivity issues for seamless, frustration-free electronics assembly.
- • **Unmatched High Impedance:** 20,000 ohms to maximize signal clarity in sensitive radio builds.
- • **Precision Brass Diaphragm:** Upgraded for crystal-clear sound and durability in every DIY project.
- • **Classic Design Meets Modern Tech:** Molded earpiece with 42-inch twisted wire blends vintage style with upgraded performance.

## Overview

The ProTechTrader Piezoelectric Ear Phone is a 2022 upgraded high-impedance ceramic ear piece designed for crystal and transistor radio projects. Featuring a durable brass diaphragm and fully soldered connections, it delivers 57dB sensitivity across a 200–8,000 Hz frequency range, ensuring superior audio clarity and reliable performance for electronics enthusiasts and professionals alike.

## 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: Ear piece for crystal set - Works great!

## 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 |
| Antenna Location | DIY Electronics Projects |
| Audio Driver Type | Piezoelectric Driver |
| Best Sellers Rank | #28,259 in Electronics ( See Top 100 in Electronics ) #1,531 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 72 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 |
| Specific Uses For Product | DIY Electronics and Radio Building |
| 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.

### ⭐⭐⭐⭐⭐ Ear piece for crystal set
*by M***I on April 8, 2026*

Works great!

### ⭐⭐⭐⭐⭐ Clear sound, good build quality.
*by C***S on October 16, 2025*

This is a solid-feeling earpiece with about 40 inches of attached cable, ending with two pre-tinned wires. With my crystal radio, these produce surprisingly good quality sound when placed in parallel with a 100k load resistor. The lower frequencies aren't exactly earth shattering, but they're not absent, either, so the resulting sound is fairly natural and not too tinny. The tips unscrew easily for cleaning. The inner diaphragm appears to be brass. I was so pleased with the first one that I ordered a second, so I can have an earpiece in each ear. Definitely helpful when zeroing in on those quiet stations.

## Frequently Bought Together

- Piezoelectric Ear Phone High Impedance Ceramic Piezo Ear Piece for Crystal Radios - Upgraded Brass Diaphram with All Soldered Connections
- 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
- BOJACK 1N34A Germanium Diode 50 mA 65V Axial 1N34A 50 millimap 65 Volt Electronic Diodes(Pack of 25 Pieces)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pt/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass](https://www.desertcart.pt/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-07-31*