---
product_id: 116193151
title: "OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack"
brand: "osd audio"
price: "¥30479"
currency: JPY
in_stock: true
reviews_count: 12
category: "Osd Audio"
url: https://www.desertcart.jp/products/116193151-osd-audio-sp70t-70v-commercial-speaker-transformer-5w-to-20w
store_origin: JP
region: Japan
---

# 20W max power taps 20Hz-20kHz ±1dB frequency response Dual impedance: 8 & 4 ohms OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack

**Brand:** osd audio
**Price:** ¥30479
**Availability:** ✅ In Stock

## Summary

> 🔊 Transform your soundscape with precision power!

## Quick Answers

- **What is this?** OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack by osd audio
- **How much does it cost?** ¥30479 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/116193151-osd-audio-sp70t-70v-commercial-speaker-transformer-5w-to-20w)

## Best For

- osd audio enthusiasts

## Why This Product

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

## Key Features

- • **Compact Yet Robust:** Small 3.5" x 2.5" x 2" footprint packs heavy-duty performance without bulk.
- • **Seamless Integration:** Compatible with standard in-wall and in-ceiling speakers for effortless 70V system upgrades.
- • **Effortless Installation:** Double-sided adhesive tape included for quick, secure mounting without hassle.
- • **Crystal-Clear Sound Fidelity:** Wide 20Hz-20kHz frequency response with ±1dB accuracy ensures pristine audio clarity.
- • **Power Flexibility at Your Fingertips:** Four selectable wattage taps (20, 15, 10, 5W) to perfectly match your audio setup.

## Overview

The OSD Audio Commercial 70V Transformer is a compact, high-performance device designed to adapt standard in-wall and in-ceiling speakers for 70-volt music and paging systems. Featuring four selectable power taps (5W to 20W), dual impedance options (8 and 4 ohms), and a wide frequency response (20Hz-20kHz ±1dB), it delivers clear, distortion-free audio. Easy to mount with included adhesive tape, this transformer is ideal for professional installations seeking reliable, scalable sound solutions.

## Description

Allows standard in-ceiling and in-wall speakers to be adapted for use with 70-volt music and paging systems.

Review: Great transformers, work as needed! - The transformers were perfect. I redid an install where they had twleve speakers running from one larger transformer. After I redid the wiring, we had one transformer per speaker unit. this got rid a lot of distortion which was in the older version of this system.
Review: Turned a crappy $20 70v speaker into a $400 JBL speaker with ridiculously powerful bass at 15 W - This transformer turned my $20 Atlas Sound speaker sound quality from a $20 speaker sound quality with no bass made it sound like a $400 speaker with JBL bass now there’s no distortion and I tapped it at 15 W and it hits real hard like I want it to love this product so much. I’m buying this every time I need to install a speaker.

## Features

- Convert Speakers to 70V or 100V: Pairs standard 8 or 4 ohm in-ceiling and in-wall speakers with a 70V or 100V amplifier, so one amp can drive many speakers.
- Four Primary Taps: Set each speaker at 20W, 15W, 10W or 5W to balance volume from room to room in offices, stores, restaurants and schools.
- Full Range Audio: 20Hz to 20kHz (±1dB) frequency response and 1dB insertion loss keep both music and paging announcements clear.
- Quick Mounting: Compact 3.37 x 2 x 2 in. housing with 6 in. leads and a self-adhesive mounting pad attaches inside the ceiling or wall cavity in seconds.
- 3 Pack for Multi-Speaker Zones: Includes 3 SP70T transformers, one per speaker, each with a self-adhesive mounting pad. 1 year warranty.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XWMMN9B |
| Best Sellers Rank | #128,530 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Audio Transformers |
| Brand | OSD Audio |
| Brand Name | OSD Audio |
| Customer Reviews | 4.4 out of 5 stars 78 Reviews |
| Item Dimensions D x W x H | 2"D x 3.5"W x 2"H |
| Item Highlight | Works with 70V or 100V Amps, 4 or 8 Ohm Speakers, 20Hz to 20kHz, Adhesive Mount, for Ceiling and Wall Paging or Music |
| Manufacturer | OSD Audio |
| Maximum Frequency | 20000 hertz |
| Minimum Frequency | 20 hertz |
| Model | OSD Audio |
| Mounting Type | in ceiling, in wall |
| Number of Items | 3 |
| Number of Packs | 3 |
| Part Number | OSD Audio |
| Power Source | Corded Electric |
| Product Dimensions | 2"D x 3.5"W x 2"H |
| Specification Met | UL |
| UPC | 819603012880 |
| Unit Count | 3 Count |
| Warranty Description | 1-Year Warranty |

## Product Details

- **Brand:** OSD Audio
- **Mounting Type:** in ceiling, in wall
- **Power Source:** Corded Electric
- **Product Dimensions:** 2"D x 3.5"W x 2"H
- **Specification Met:** UL

## Images

![OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack - Image 1](https://m.media-amazon.com/images/I/51HzUun9QmL.jpg)
![OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack - Image 2](https://m.media-amazon.com/images/I/71zw+61-xhL.jpg)
![OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack - Image 3](https://m.media-amazon.com/images/I/51aJydsnGsL.jpg)
![OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack - Image 4](https://m.media-amazon.com/images/I/51SYN+7gmIL.jpg)
![OSD Audio SP70T 70V Commercial Speaker Transformer, 5W to 20W Taps, 3 Pack - Image 5](https://m.media-amazon.com/images/I/61pyJy719JL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great transformers, work as needed!
*by J***R on January 28, 2018*

The transformers were perfect. I redid an install where they had twleve speakers running from one larger transformer. After I redid the wiring, we had one transformer per speaker unit. this got rid a lot of distortion which was in the older version of this system.

### ⭐⭐⭐⭐⭐ Turned a crappy $20 70v speaker into a $400 JBL speaker with ridiculously powerful bass at 15 W
*by G***N on June 26, 2026*

This transformer turned my $20 Atlas Sound speaker sound quality from a $20 speaker sound quality with no bass made it sound like a $400 speaker with JBL bass now there’s no distortion and I tapped it at 15 W and it hits real hard like I want it to love this product so much. I’m buying this every time I need to install a speaker.

### ⭐⭐⭐⭐⭐ Easy to use, works great
*by A***J on December 28, 2019*

I ordered several of these to retrofit a client's existing 8 ohm speakers into a 70v system. They were simple to use, and have been working great for a few months now. No complaints. They were also a great price and came quickly, which was a huge benefit. We were on a short timetable trying to set everything up before the business had its grand opening.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-13*