About Us
Founded in 2021 by Krissy Tetrault , Heartsound Audio is a New England based company that focuses on improving home audio systems. Heartsound products are manufactured in the USA and are individually crafted from the highest quality materials available.
Each piece produced is designed specifically for audiophiles, by audiophiles.
The development of products has taken many years, various chemists and other professionals in the scientific and academic world have continued to collaborate with Heartsound. We have one main goal: to improve the quality of our beloved gear without changing a piece.
This several year collaboration has birthed a viable new high performance product line, unique and interesting, that we are quite passionate about.
We present the
“Holostage”
SUGGESTIONS
FOR PLACEMENT
Begin by placing Holostages in each corner, at approximately four foot in height.
The devices can and should be moved around the listening room until optimal performace is achieved.
- Place around the room for a larger sound stage
- Place on speakers for an increase in speed and accuracy
- Place near/on components for an audible reduction of noise and improvement of dynamics
- Place on power supply for a larger sound stage , overall improvement of dynamics and a drop in noise floor


Our Reviews
I have an immediate increase in gain, high frequency extension
improved separation and layering with your products. This results in increased dynamics. resolution and lingering high notes floating around, it’s beautiful!
Mikey
The Cop NYC
These, my dear, are hugely
impactive devices
Small but mighty! A person would have to be deaf not to appreciate the benefits.
DB
Canada
I continue to be amazed by the
Heartsound products
I never knew my system could sound like this!
Scott P.
Windsor, SC.
After letting it play for
several days
it exposed the “wow” factor! Amazing!
David M.
Bethel, Me.
My wife and I experienced dramatic changes to the system using this product
Holostages are easy to place and Krissy had tons of suggestions for placement. We went from skeptics to believers!
MS, DS.
Scottsdale, Az.
I haven’t purchased many tweaks, but curiosity got the best of me.
I was pleasantly surprised with the Holostages! As claimed, the small boxes somehow increased the size of my sound stage — and I can hear more of the original recordings ! More floaty, twinkly piano notes than ever before!
Brian T.
Dover, Wisconsin.
Took a few days for my bass to settle in… but when it did…
WOW! She’s got a winner! Every set of Holostages was like adding a new piece of gear!
Richard B.
Encinitas, Ca.
Krissy assisted in finding the perfect spots for my set of four.
The clarity and utter lack of artifice or strain—- it’s addictive! This may be the most powerful ‘tweak’ I’ve ever heard!
Ernest M.
Saugatuck, MI.
Krissy is a dedicated audiophile whose main goal is customer satisfaction.
Each product she creates, gives even more than what you’d expect. I was quite skeptical of tweaks in general, however, using Heartsound I now have an undeniable fully developed sound with even more air and decay. A+!
Leon F.
Tampa, Fl.
Heartsound brings big improvements to existing audio systems for modest dollars.
Quite staggering, really, the amount of huge space, energy and dynamics I’ve experienced using your products! I’m bowled over!