---
product_id: 422748152
title: "Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)"
brand: "protechtrader"
price: "101 zł"
currency: PLN
in_stock: true
category: "Pro Tech Trader"
url: https://www.desertcart.pl/products/422748152-piezoelectric-crystal-earphone-bare-wire-upgraded-brass
store_origin: PL
region: Poland
---

# 20,000Ω High Impedance 200-8,000 Hz Frequency Range All Soldered Brass Diaphragm Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass)

**Brand:** protechtrader
**Price:** 101 zł
**Availability:** ✅ In Stock

## Summary

> 🎙️ Hear the Future of DIY Audio – Precision Meets Durability!

## Quick Answers

- **What is this?** Piezoelectric Crystal Earphone Bare Wire (Upgraded Brass) by protechtrader
- **How much does it cost?** 101 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Proven Reliability:** Top-rated with 4.4 stars and trusted by hobbyists who demand consistent, high-quality audio output every time.
- • **Crystal-Clear Audio:** High impedance 20,000Ω driver delivers precise sound for your DIY crystal radio and sensitive electronics projects.
- • **Tailored for Makers:** Designed specifically for crystal radios, transistor projects, and lab experiments—engineered to elevate your builds.
- • **Unmatched Durability:** Brass diaphragm and soldered wiring ensure long-lasting, reliable performance—no more fragile tin or glued parts.
- • **Plug & Play Precision:** Pre-tinned bare leads and 3.5mm jack compatibility make integration seamless for any electronics enthusiast.

## Overview

The ProTechTrader Piezo Earphone features a high-impedance 20,000Ω piezoelectric driver with a robust brass diaphragm and fully soldered connections, designed specifically for crystal radios and DIY electronics projects. Offering a frequency response from 200 to 8,000 Hz, this in-ear earphone ensures clear, reliable sound with enhanced durability over typical tin diaphragm models. Compatible with 3.5mm jacks and equipped with pre-tinned leads, it’s the go-to choice for makers seeking professional-grade audio components.

## Description

desertcart.com: High Impedance Crystal Earphone for Crystal Radio, Piezoelectric Earpiece : Sports & Outdoors

## Features

- This high-impedance piezoelectric earphone connects to crystal radios and other circuits with weak audio output. Use this high impedance crystal radio earphone where a standard earpiece loads the signal too heavily.
- Its 20,000-ohm impedance works with passive crystal radio signals without requiring a battery or separate amplifier. The ceramic element responds to the receiver's small audio signal.
- A 42-inch twisted black lead ends in two pre-tinned bare wires for soldering or terminal connections. The long cable leaves room to position the earpiece at the bench.
- Use the single earpiece for crystal radio builds, transistor radio restoration, lab demonstrations, and signal tracing. Use the bare leads in radio projects or connect them to screw terminals and breadboard jumpers.
- One beige earphone comes with two bare wire ends. Add a plug or terminals if your circuit needs them; the radio receiver isn't included.

## 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 | #336 in Two-Way Radio Headsets & Microphones |
| Brand Name | ProTechTrader |
| Built-In Media | Earphone only |
| Cable Features | Retractable |
| 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 4.4 out of 5 stars (74) |
| Earpiece Shape | Rounded Tip |
| Enclosure Material | Metal |
| Frequency Range | 200 to 8,000 Hz |
| Frequency Response | 8000 hertz |
| Headphone Folding Features | In Ear |
| Headphone Jack | 3.5 mm Jack |
| Headphones Ear Placement | In Ear |
| Impedance | 20000 ohm |
| Item Weight | 0.01 kg |
| 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 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 ohm

## 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.

## Frequently Bought Together

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

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-09-02*