---
product_id: 293850643
title: "300W in Wall Volume Control Impedance Matching for Home Speakers, Rotary Knob White SVC300"
brand: "osd audio"
price: "VT28930"
currency: VUV
in_stock: true
reviews_count: 5
category: "Osd Audio"
url: https://www.desertcart.vu/products/293850643-300w-in-wall-volume-control-impedance-matching-for-home-speakers
store_origin: VU
region: Vanuatu
---

# 300W power per channel Impedance matching for up to 8 speaker pairs 12-step rotary knob control 300W in Wall Volume Control Impedance Matching for Home Speakers, Rotary Knob White SVC300

**Brand:** osd audio
**Price:** VT28930
**Availability:** ✅ In Stock

## Summary

> 🎛️ Command your soundscape with precision and power!

## Quick Answers

- **What is this?** 300W in Wall Volume Control Impedance Matching for Home Speakers, Rotary Knob White SVC300 by osd audio
- **How much does it cost?** VT28930 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/293850643-300w-in-wall-volume-control-impedance-matching-for-home-speakers)

## 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

- • **Sleek In-Wall Design:** Flush mounts into standard gang boxes with included decor plates for a clean, professional look.
- • **Powerhouse Performance:** Delivers a robust 300 watts per channel with minimal bass roll-off for immersive sound.
- • **Effortless Installation:** Removable, solderless quick-connect terminals support up to 14-gauge wiring for fast setup.
- • **Precision Volume Control:** 12-step rotary knob lets you tailor audio levels independently across your home zones.
- • **Smart Impedance Matching:** Protects your amplifier by stabilizing ohm load when connecting up to 8 pairs of 8Ω speakers.

## Overview

The OSD Audio SVC300 is a high-performance in-wall volume control designed for home audio systems, delivering 300 watts per channel with advanced impedance matching to protect your amplifier. Featuring a smooth 12-step rotary knob and easy installation with quick-connect terminals, it allows independent volume adjustment for multiple speaker zones while maintaining sleek, flush-mounted aesthetics.

## Description

The OSD In-Wall Home Theater Speaker Volume Control is a unique design to switch the volume of speakers independently from the rest of the house. Mount it on a wall to use in varying locations for soft or high volume. Optimal Speaker Design is engaged in the design, engineering, and distribution of high-quality home and commercial audio products. Our products range in complexity from simple in-ceiling speakers to whole house audio systems—all with beautiful styling and high-end sound quality.Our U.S.-based research, development and design team, is supported by a network of cutting-edge acoustical, mechanical and electrical engineers. Together, we create products that combine the latest technology with ease of use for a quality sound experience.With extensive product and application knowledge, our exceptional team provides you with custom solutions to create the perfect audio solution.

Review: Works as promised. Easy to install. Appears to be of utmost quality.
Review: I researched many different volume control knobs offered on desertcart and decided to give this one a go! The installation was a breeze! You will need a box extender as these units are quite deep but they’re easy to find on desertcart! When it comes to the knob itself it is very well built, there’s no pausing in the audio when adjusting the level (as others have mentioned) and you won’t be disappointed! Note: The instructions could have been a little clearer when setting the impedance matching toggle... also, I didn’t see this mentioned anywhere but the higher you set the toggle example 1/2x -> 4x -> 8x you’ll notice a drop in the volume output from your speakers however that is to be expected! Overall, I was very happy with this control knob! Like the title says I ended up purchasing another one! The second one was a little temperamental at first but that was due to some wiring that needed to be replaced and due to a more powerful amplifier! I replaced some wires and reduced the volume on the amplifier and now all is awesome with this one too!

## Features

- HIGH POWER: The SVC300 is rated at 300 Watts per channel with minimal bass roll-off. It includes front mounted adjustable impedance jumpers to add up to eight pairs of 8 ohm speakers simultaneously.
- VOLUME CONTROL: The controls allow you to adjust the volume of a pair of speakers independently of other speakers in a house audio system. They are ideal for both softer and higher volume locations.
- IMPEDANCE PROTECTION: This feature of SVC300 assists in stabilizing the ohm load going back to the amp or receiver with parallel connections to avoid overheating and damaging expensive equipment.
- KNOB: Simple to wire with a 12-step, high-quality autoformer design, the rotary-style knob allows a wide range of listening volumes. White, ivory and almond trim decor plates are included.
- DESIGN: For dedicated audio zones, the SVC300 install easily into the wall and works with most systems. Removable and solderless terminals accept up to 14 gauge wiring and fits in a standard gang box.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007U2GVY0 |
| Best Sellers Rank | #74,263 in Electronics ( See Top 100 in Electronics ) #35 in Ceiling & In-Wall Speakers |
| Brand Name | OSD Audio |
| Circuit Type | parallel |
| Color | White/Ivory/Almond |
| Connectivity Protocol | wired |
| Connector Type | Quick Connect |
| Control Method | Touch |
| Controller Type | Knob |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,083) |
| Global Trade Identification Number | 00810281013374 |
| Included Components | removable and solderless terminals, decor plates |
| Item Dimensions | 12.7 x 7.6 x 10.2 centimeters |
| Manufacturer | OSD Audio |
| Material Type | Metal |
| Model | OSD-SVC-300 |
| Mounting Type | Built-in Mount |
| Number of Items | 1 |
| Number of Positions | 12 |
| Specification Met | No |
| Switch Type | Rotary |
| Terminal | Quick-connect |
| UPC | 810281013374 |
| Unit Count | 1 Count |
| Wattage | 300 watts |

## Product Details

- **Brand:** OSD Audio
- **Connector type:** Quick Connect
- **Material:** Metal
- **Switch type:** Rotary
- **Terminal:** Quick-connect

## Images

![300W in Wall Volume Control Impedance Matching for Home Speakers, Rotary Knob White SVC300 - Image 1](https://m.media-amazon.com/images/I/61NiTCA20XL.jpg)

## Available Options

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

## Questions & Answers

**Q: how do I order white**
A: say it comes with all 3 trim colors

**Q: how do I hook up 4 8 ohm speakers?**
A: Two sets of two speakers. A-B and C-DConnect A-B in parallel; Connect C-D in parallel. Each set will therefore be 4 ohms per set. Then connect each set in Series and that will end up as being 8 Ohms

**Q: Please explain if the slider itself can be ivory, along with the plate or if the slider control is one color and the plates changeable?**
A: Hello, the plates, screws and slider pieces are the different colors.

**Q: Will this match the impedance for 3 speakers?**
A: Why would alejandro say you can only have 3 speakers.  The description clearly states "up to 8 pairs of 8ohm speakers" .

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by K***H on 21 November 2025*

Works as promised. Easy to install. Appears to be of utmost quality.

### ⭐⭐⭐⭐⭐ Review
*by B***Y on 29 July 2020*

I researched many different volume control knobs offered on Amazon and decided to give this one a go! The installation was a breeze! You will need a box extender as these units are quite deep but they’re easy to find on Amazon! When it comes to the knob itself it is very well built, there’s no pausing in the audio when adjusting the level (as others have mentioned) and you won’t be disappointed! Note: The instructions could have been a little clearer when setting the impedance matching toggle... also, I didn’t see this mentioned anywhere but the higher you set the toggle example 1/2x -> 4x -> 8x you’ll notice a drop in the volume output from your speakers however that is to be expected! Overall, I was very happy with this control knob! Like the title says I ended up purchasing another one! The second one was a little temperamental at first but that was due to some wiring that needed to be replaced and due to a more powerful amplifier! I replaced some wires and reduced the volume on the amplifier and now all is awesome with this one too!

### ⭐⭐⭐⭐⭐ Review
*by H***E on 5 March 2024*

I decided to replace my previous knob volume control (based on impedance matching) after one of the amplifier's channel of my Onkyo Receiver didn't work anymore, and I suspect that the culprit was the inductive coupling. So I decide to replace it by this resistive type, and this one, works perfect. One of the features I like is that has full volume at one end (direct connection, no resistors), meanwhile on the other end, the last step is disconnected (fully isolation of speakers), for great control. It comes with three different colors of covers and knobs to match your taste. It was easy to install, replacement was straightforward. Inputs/outputs on the device are well labeled and the screw connectors make it fast work, connectors also can be detached from the knob control, for easier cable hookup. Product seems of excellent quality. Overall, Recommended. Review made by Handyman

## Frequently Bought Together

- OSD 300W in Wall Volume Control Impedance Matching for Home Speakers, Rotary Knob White SVC300
- Pyle Home 2-Way In-Wall In-Ceiling Speaker System - Dual 8 Inch 300W Pair of Ceiling Wall Flush Mount Speakers w/ 1" Silk Dome Tweeter, Adjustable Treble Control - For Home Theater Entertainment PIC8E

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-03*