---
product_id: 44637162
title: "5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1"
brand: "hiletgo"
price: "66 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Hi Letgo"
url: https://www.desertcart.ro/products/44637162-5pcs-ei14-ei-14-audio-coupling-isolation-transformer-audio-transformer
store_origin: RO
region: Romania
---

# Stable high-pressure performance 290mH inductance ±20% 1:1 impedance ratio 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1

**Brand:** hiletgo
**Price:** 66 Lei
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with precision transformers that pros trust!

## Quick Answers

- **What is this?** 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1 by hiletgo
- **How much does it cost?** 66 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/44637162-5pcs-ei14-ei-14-audio-coupling-isolation-transformer-audio-transformer)

## Best For

- hiletgo enthusiasts

## Why This Product

- Trusted hiletgo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **EMC & EMI Resistant:** Engineered to minimize interference, delivering stable and noise-free audio
- • **Robust Build Quality:** Nickel alloy core and QA-1 0.06MM wire for durability and long-lasting performance
- • **Precision Audio Coupling:** Ensures crystal-clear signal transfer with a perfect 600:600 Ohm impedance match
- • **Versatile Double-Winding:** 800 turns on primary and secondary coils for optimal inductance and efficiency
- • **Plug-and-Play Convenience:** Compact PCB mount design, ideal for professional audio and intercom systems

## Overview

The HiLetgo EI14 Audio Coupling Isolation Transformer offers a 1:1 impedance ratio of 600:600 Ohms, featuring a nickel alloy core and double-wire winding with 800 turns each. With 290mH inductance and robust EMC/EMI resistance, it delivers stable, high-pressure performance ideal for professional audio coupling and intercom applications. Compact and PCB-mountable, this 5-pack ensures reliable, noise-free signal isolation for your critical sound setups.

## Description

HiLetgo 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1 Specifications Color: Red Model: EI14 Material: Nickel alloy AC impedance : EI14 600 : 600 Ohm Item : Audio transformer inductance : 290mH (±20%) DC resistance : 135(±%) Windability : Double-wire winding Quality &wire diameter : QA-1 0.06MM Primary coils : 800 turns secondary coils : 800 turns Alternating-current impedance value : 600 Features Selection of quality, long life EMC, EMI, high pressure, stable performance High efficiency transformer Package included: 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer

Review: Great Product - works well
Review: Using for basically leave in place audio coupling - For my purpose works well for audio and intercom dry coupling. Very similar to all others, seem to have good response doesn't saturate at line level. Doesn't block dc well and will start to cook like some others. I put 10uf @50 VDC (NP) Non-Polarized caps on both sides to keep phantom and ICM power out without much low-end loss. I make up on inexpensive pc board put in small plastic project 2"x2"x1" project box with XLR Male / Female respective wired with audio cable through an 1/8" hole for in and out. Could be 1/4" TRS also. I do not couple chassis ground in my case. I use whatever is over in my shop to build like recycled XLR connectors. Most times it is left at venue or if it gets broken by moving equipment cases. If I used my standard fare, I would not want to leave, it that be a lot of money.

## Features

- Advantages:high pressure and stable performance
- AC impedance : EI14 600 : 600 Ohm
- Inductance:290mH (±20%)
- Quality &wire diameter : QA-1 0.06MM
- Alternating-current impedance value : 600

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073PXK2RX |
| Best Sellers Rank | #195,670 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #51 in Isolation Transformers |
| Brand Name | HiLetgo |
| Customer Reviews | 4.4 4.4 out of 5 stars (118) |
| Item Weight | 0.03 Kilograms |
| Manufacturer | HiLetgo |
| Minimum Frequency | 50 Hz |
| Model | 3-01-1453 |
| Mounting Type | PCB Mount |
| Part Number | 3-01-1453 |
| Power Source | Corded Electric |
| Specification Met | RoHS |

## Product Details

- **Brand:** HiLetgo
- **Item Weight:** 0.03 Kilograms
- **Mounting Type:** PCB Mount
- **Power Source:** Corded Electric
- **Specification Met:** RoHS

## Images

![5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1 - Image 1](https://m.media-amazon.com/images/I/51EGoUX0SdL.jpg)

## Questions & Answers

**Q: I'm looking for options for building a buffered, multi-output splitter for a guitar signal to feed several amplifiers or DI lines. Yay or nay?**
A: If you are buffering for each input to each transformer there should be no problem but, there are no specs on the frequency characteristics.  The stated impedance is 600 ohms but with the small size, I would think the low-end frequencies would drop off quite rapidly.  My application was for isolation of the ground circuit.

**Q: primary to secondary hipot ?**
A: Not sure as I had no need to test.  My application was in a simple iso circuit for computer audio interface.  They were great for the price.  Previously I would use Radio Shack transformers for the same application.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Product
*by M***E on September 28, 2025*

works well

### ⭐⭐⭐⭐⭐ Using for basically leave in place audio coupling
*by T***C on February 27, 2022*

For my purpose works well for audio and intercom dry coupling. Very similar to all others, seem to have good response doesn't saturate at line level. Doesn't block dc well and will start to cook like some others. I put 10uf @50 VDC (NP) Non-Polarized caps on both sides to keep phantom and ICM power out without much low-end loss. I make up on inexpensive pc board put in small plastic project 2"x2"x1" project box with XLR Male / Female respective wired with audio cable through an 1/8" hole for in and out. Could be 1/4" TRS also. I do not couple chassis ground in my case. I use whatever is over in my shop to build like recycled XLR connectors. Most times it is left at venue or if it gets broken by moving equipment cases. If I used my standard fare, I would not want to leave, it that be a lot of money.

### ⭐⭐⭐⭐⭐ I wanted 500 mH inductors for a wah-wah guitar pedal, and got just that, but yellow
*by E***. on September 4, 2022*

Some comments suggested a difference between the red ones and yellow ones; mine came yellow. One description said they are 290 mH, so I was going to use two, but the ones I got measure 500-600 mH on each winding, and so are just right for my current purpose, which is for the filter in a DIY wah-wah pedal. All of them seem fine, but I have neither stressed them, nor used them as isolation transformers. They are small (1/2 inch cube) and light (5g or 0.2 oz).

## Frequently Bought Together

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-05-14*