---
product_id: 386157148
title: "Parts Express 70V 10W Speaker Line Matching Transformer"
brand: "parts express"
price: "€ 77.81"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/386157148-parts-express-70v-10w-speaker-line-matching-transformer
store_origin: FI
region: Finland
---

# 10W max power handling 70.7V constant voltage line 5 selectable power taps Parts Express 70V 10W Speaker Line Matching Transformer

**Brand:** parts express
**Price:** € 77.81
**Availability:** ✅ In Stock

## Summary

> 🎧 Transform your sound, amplify your presence.

## Quick Answers

- **What is this?** Parts Express 70V 10W Speaker Line Matching Transformer by parts express
- **How much does it cost?** € 77.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/386157148-parts-express-70v-10w-speaker-line-matching-transformer)

## Best For

- parts express enthusiasts

## Why This Product

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

## Key Features

- • **Flexible Power Tapping:** Choose from 0.62W to 10W taps to perfectly match speaker wattage and maximize efficiency.
- • **Compact & Lightweight Design:** At just 7.7 x 4.9 x 4.5 cm and 272g, it fits discreetly into any setup without bulk.
- • **Precision Frequency Response:** Crisp audio fidelity from 100Hz to 12kHz, capturing every nuance of your sound system.
- • **Reliable Isolation Transformer:** Protects your audio equipment by isolating and matching impedance for consistent performance.
- • **Seamless Public Address Integration:** Optimized for 70.7V or 25V PA amplifier lines, ensuring crystal-clear sound delivery across venues.

## Overview

The Parts Express 70V 10W Speaker Line Matching Transformer is a compact, corded electric transformer designed for public address systems. It supports 70.7V or 25V constant voltage lines, offers a frequency response of 100-12,000 Hz, and features selectable power taps from 0.62W to 10W to match various speaker impedances (4 or 8 ohms). Ideal for professional audio setups requiring reliable impedance matching and sound clarity.

## Description

Constant voltage, isolated line matching transformer for use with public address amplifiers utilizing a 70.7 volt or 25 volt carrier line for sound transmission. Frequency response: 100-12,000 Hz. Secondary impedance: 4 or 8 ohms. Tap at 0.62W, 1.25W, 2.5W, 5W and 10W.

## Features

- Item Category: Transformer
- Item Trademark: Parts Express
- manufacturer: Generic

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 7.7 x 4.9 x 4.5 cm; 272 g |
| Part number | 300-040 |
| Power source type | Corded Electric |
| Item model number | 300-040 |
| ASIN | B0002KRA1U |

## Product Details

- **Brand:** Parts Express
- **Power source:** Corded Electric
- **Current rating:** 3 Amps
- **UPC:** 844632010170

## Images

![Parts Express 70V 10W Speaker Line Matching Transformer - Image 1](https://m.media-amazon.com/images/I/81cdC2fZZNL.jpg)
![Parts Express 70V 10W Speaker Line Matching Transformer - Image 2](https://m.media-amazon.com/images/I/81Ta7S3wTlL.jpg)

## Questions & Answers

**Q: what is the primary coil's impedance rating?**
A: Brown to common primary will give about 10K while orange gives about 7K. Blue is around 800ohms, and I haven’t tested the rest. This was all measured by a HealthKit IT 28 which will may have around 10% error; however, those impedances have worked great for my tube amp needs. I hope this helps.

**Q: With 6 wires color coded are there instructions on what goes where?**
A: The wiring guide is printed right on the transformer. Connect the primary side to your 70V amplifier using the black primary common and whichever primary tap you want to use based on the watts you want to allocate to that speaker. Connect your speaker using the black secondary common wire plus the wire that matches the impedance of your speaker... 4, 8, or 16 ohm.

## Frequently Bought Together

- Parts Express 10W Corded Electric Speaker Line Matching Transformer, 3.0 amps, 100 Hz - 12 kHz, 300-040, 0.88 lbs
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**Shop now:** [https://www.desertcart.fi/products/386157148-parts-express-70v-10w-speaker-line-matching-transformer](https://www.desertcart.fi/products/386157148-parts-express-70v-10w-speaker-line-matching-transformer)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-25*