John Sayers' Design Forum

John Sayers' Recording Studio Design Forum

A World of Experience
Click Here for Information on John's Services
It is currently Thu Jan 27, 2022 9:52 pm

All times are UTC + 10 hours

Post new topic Reply to topic  [ 1 post ] 
Author Message
PostPosted: Mon Oct 11, 2021 4:09 am 

Joined: Tue Feb 02, 2021 1:56 pm
Posts: 27
Location: Detroit, MI USA
Hey all,

I've been on an EMI journey lately given that my old bedroom home studio had some ground loops and EMI buzz. When I recently mapped-out all of the breakers and saw which rooms were sharing circuits, some of the root causes became clear. With the new setup I'm building in my basement (shown here) I want to make sure I'm getting the cleanest, dedicated power and minimizing EMI to the furthest extent possible.

In this journey, I've learned what many know already: Dimmer switches are the enemy. A powerful LED dimmer switch anywhere in the house is enough to generate a lot of EMI noise. My first step was to get rid of all dimmers that were unnecessary, but in the few cases where a switch was absolutely needed, I wanted to find the unit that produced the least EMI.

I didn't have the advantage of an oscilloscope so I used an AM radio and a simple power source, dimmer, and LED downlight setup. The units I tested from Lutron, Leviton, and Eaton were garbage. The Lutron Diva in particular could qualify as a radio tower. You can pick up the interference several rooms away with even one of those units in the house.

The unit that produced the least amount of audible interference (by far) was the Legrand/Pass & Seymour Radiant switch (shown here).

I have no connection to the company, so this is just information sharing from my own journey. This is also not the most scientific or precise approach to comparing dimmers, but having found no resource or article that compares dimmers in this way, I figured I would share my own findings and experience.

The best outcome is no dimmers at all, but if you have to put one somewhere in the house, try the Legrand/Pass & Seymour Radiant switch.

All the best -


You do not have the required permissions to view the files attached to this post.

Report this post
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC + 10 hours

Who is online

Users browsing this forum: No registered users and 3 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group