--- product_id: 67513049 title: "Piezoelectric Crystal Earphone Bare Wire" brand: "protechtrader" price: "150 kr" currency: DKK in_stock: true reviews_count: 13 category: "Pro Tech Trader" url: https://www.desertcart.dk/products/67513049-piezoelectric-crystal-earphone-bare-wire store_origin: DK region: Denmark --- # 57dB sensitivity @1kHz 20,000Ω high impedance 42-inch twisted bare wire Piezoelectric Crystal Earphone Bare Wire **Brand:** protechtrader **Price:** 150 kr **Availability:** ✅ In Stock ## Summary > 🎙️ Build your sound legacy with every wire twist! ## Quick Answers - **What is this?** Piezoelectric Crystal Earphone Bare Wire by protechtrader - **How much does it cost?** 150 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/67513049-piezoelectric-crystal-earphone-bare-wire) ## 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 - • **Built to Last:** All-soldered connections and brass diaphragm boost durability and reliability. - • **DIY Dream Essential:** Perfect for crystal and transistor radio kits, empowering your hands-on creativity. - • **Bare Wire Flexibility:** 42-inch twisted wire with pre-tinned leads for seamless custom wiring and integration. - • **Crystal Clear Sensitivity:** 57dB rated sensitivity ensures crisp sound reproduction from 200Hz to 8kHz. - • **Vintage Vibes, Modern Precision:** Classic piezoelectric driver with 20kΩ impedance for authentic DIY audio projects. ## Overview This Piezoelectric Crystal Earphone features a high 20,000 ohm impedance and 57dB sensitivity, delivering vintage-style audio clarity ideal for DIY electronics projects like crystal and transistor radios. Its durable brass diaphragm and all-soldered connections ensure long-lasting performance, while the 42-inch twisted bare wire leads offer flexible integration for custom builds. ## Description desertcart.com: 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 : Electronics Review: Great service and quick delivery... - Good item for the price.. Review: Just like when I was a kid - My son recently discovered crystal/trench radios and wanted to try his hand at making one. He asked for a piezo earpiece and this is the one I decided to grab for him. Its just like the one I used when I was his age to make a radio. Worked flawlessly. Grab one and get building a radio! ## Features - Perfect to make electronics projects like Crystal or Transistor Radios DIY Electronics Kits - 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 - Classic style highly sensitive molded earpiece with 42-in twisted wire with pre-tinned bare wire connections (Also available with 3.5mm Aux Headphone Style Phono Connector - See B01JEOH3QQ) - 2022 Updated Model Available (See B09MZML96L) Featuring All Soldered Connections and a Brass Diaphram for Increased reliability and life. PiezoElectric Crystal Earpiece for DIY Electronics Kits ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071JWPTT9 | | Age Range (Description) | Adult | | Audio Driver Type | Piezoelectric Driver | | Best Sellers Rank | #54,142 in Electronics ( See Top 100 in Electronics ) #2,717 in Earbud & In-Ear Headphones | | Cable Feature | Retractable | | Compatible Devices | Crystal Radios, Transistor Radios | | Connectivity Technology | Wired | | Control Method | Touch | | Customer Reviews | 4.5 4.5 out of 5 stars (212) | | Date First Available | May 29, 2017 | | Earpiece Shape | in-ear | | Hardware Interface | 2.5mm Audio | | Headphones Jack | 3.5 mm Jack | | Included Components | Piezoelectric Earphone with Bare Wire Leads for Crystaol Radios | | Input Device Interface | Audio jack | | Is Discontinued By Manufacturer | No | | Item Weight | 0.22 ounces | | Item model number | Piezo-bare | | Manufacturer | ProTechTrader | | Material | ceramic | | Model Name | Piezo-bare | | Noise Control | None | | Number of Items | 1 | | Product Dimensions | 1 x 1 x 1 inches | | Special Feature | High Sensitivity Vintage Style Ear Phone, Piezo Electric 20k ohm Impedance Ear Piece | | Specific Uses For Product | DIY Electronics Projects | | Supports Bluetooth Technology | No | | UPC | 789048342869 | | Units | 1.0 Count | | Wireless Communication 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 Bare Wire - Image 1](https://m.media-amazon.com/images/I/61TseA8aIQL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great service and quick delivery... *by J***T on July 27, 2025* Good item for the price.. ### ⭐⭐⭐⭐⭐ Just like when I was a kid *by M***N on August 5, 2024* My son recently discovered crystal/trench radios and wanted to try his hand at making one. He asked for a piezo earpiece and this is the one I decided to grab for him. Its just like the one I used when I was his age to make a radio. Worked flawlessly. Grab one and get building a radio! ### ⭐⭐⭐⭐⭐ Good quality *by L***E on December 14, 2024* Have used in several different circuits. No problem. Recommend ## 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 - BOJACK 1N34A Germanium Diode 50 mA 65V Axial 1N34A 50 millimap 65 volt Electronic Diodes (Pack of 25) - 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 --- ## 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.dk/products/67513049-piezoelectric-crystal-earphone-bare-wire](https://www.desertcart.dk/products/67513049-piezoelectric-crystal-earphone-bare-wire) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-05-01*