Kevin P. Duffy


Kevin Duffy is CEO of Sound United and its holding company, DEI Holdings. Kevin joined DEI Holdings in 2003 and has served in a variety of roles including Chief Financial Officer DEI Holdings, President of Directed Electronics, Senior Vice President – Corporate Development, Marketing, and Investor Relations.

Before joining DEI, Kevin worked for ThinkTank Holdings LLC, a private investment firm located in Southern California and for one of its portfolio companies as Executive Vice President. Kevin’s previous experience includes serving as Director of Strategy at Clarion Corporation of America, as well as consulting with Bain & Company and Deloitte & Touché.

He holds an B.A. in Economics from Princeton University and a Masters of Business Administration from the Stanford Graduate School of Business.


First Album

Beastie Boys Licensed to Ill

First Concert

KROQ Weenie Roast (Stone Temple Pilots, Gin Blossoms, Dramarama, etc.)

Favorite Album

Counting Crows August and Everything After

Scott Hagen

Senior Vice President, Commercial Operations Americas

Scott has spent a majority of his career within the home entertainment and audio industry, working for both manufacturers’ and retailers. Before joining Sound United, Scott was Vice President of Sales and Strategic Planning at Zoom, a manufacturer of professional music and recording devices, where he led the companies’ Sales and Operations teams.

Scott began his career at Best Buy, the largest retailer of consumer electronic products, where he worked his way up through the company, leading many of the business and corporate strategy teams that were instrumental in the growth of Home Theater, Car Audio, and Digital Imaging categories at Best Buy. Originally from Minnesota, Scott is a passionate musician and music lover who holds a degree from the Music Technical Institute of Minnesota in Music Business and Production.


First Album

Purple Rain, Prince

First Concert

Buddy Guy

Favorite Album

Songs From The Capeman, Paul Simon

Bart Muller

Senior Vice President, Commercial Operations Europe

Bart joins us most recently from Stanley Black & Decker, where he served as President of Emerging Markets while based in Dubai and oversaw a $300m line of business, which included legacy tooling brands De Walt, Stanley, Black & Decker, Facon and Proto. Prior to his role there, Bart spent the first 15 years of his career working in branded audio, including time as general manager for Marantz in the 1990s (where, coincidentally, he worked with Terry on numerous projects) before moving on to several longstanding executive leadership positions at Philips, Asia-Pacific, ARC International and First National Glassware.

Bart’s global experience as a seasoned business development professional — which includes a deep understanding of sales, marketing, supply chain, factory logistics, mergers / acquisitions and product strategy, to name a few — bodes extremely well for Sound United as we continue to scale our mission of Bringing Joy to the World through Sound.

Originally hailing from the Netherlands, Bart’s first language is Dutch. He also speaks English, German and French. Bart holds a Bachelor of Science degree in Industrial Engineering & Management from the Eindhoven University of Technology. He is married and has six children.


First Album


First Concert

The Police

Favorite Album

Best of Whitney Houston Live

Blair Tripodi

Senior Vice President, Commercial Operations Asia Pacific

A life long Brand and Sports Marketer, Blair began his career working the agency world helping brands launch their latest and greatest. Following that he transitioned to Nike Inc first off in Canada and then at the WHQ in Beaverton, OR. Blair led the strategic marketing planning for many of Nike’s largest customers and worked to creatively integrate the brand into retail settings across North America.

After nearly 5 years with Nike, Blair transitioned to the US Olympic Committee and spent 6 years helping America’s athletes achieve their dreams through working in the divisions of Brand Marketing, Consumer Products and NGB Marketing.

Most recently prior to joining Sound United, Blair was the Managing Director of Under Armour’s European, Middle Eastern and African business being one of the first executives on the ground to help launch the now infamous global sports company.


First Album

Michael Jackson Thriller – Vinyl not cassette

First Concert

Hall and Oates

Favorite Album

The Joshua Tree – U2

Gary Fletcher

Senior Vice President, Operations

Gary Fletcher is the Sr. VP Operations and Supply Chain.

Gary joined Sound United in 2016. Prior to Sound United, Gary held the position of VP of Procurement at Harman responsible for $3.6B spend. Prior to Harman, Gary held various senior level positions at Motorola both in Europe and US including heading global outsourcing for Motorola’s Home and Networks Division ($12B Rev). Gary started his career at Ford Motor Co, based at their R&D center in the UK. Gary holds a BS in Engineering Management from Anglia Ruskin University, UK


First Album

The Jam - Snap

First Concert

Guns & Roses

Favorite Album

The Who - Quadrophenia

Debra Jensen

Senior Vice President, Global IT

Debra Jensen is SVP of Global IT of Sound United. She joined the company in 2018. She is also currently a Board Director for Self-Esteem Brands (Anytime Fitness), a privately held international fitness company.

Debra’s most recent experience was Chief Information Officer for Charlotte Russe, Inc, a fashion retailer based in San Francisco. Debra began her career at Gap Stores and then moved to Longs Drugs where she worked her way up to VP of Application Development before leaving to join Jack in the Box as their Chief Information Officer. She holds a BA in Business Administration from Saint Mary’s College in Moraga, California.


First Album

Dire Straits, Brothers in Arms

First Concert

Dire Straits

Favorite Album

Raising Sand; Robert Plant and Alison Krauss

Joel Sietsema

Senior Vice President, Brand Management, Marketing, & Design

Joel Sietsema is the Sr. VP of Brand Management for Sound United brands.

As a lifelong technology enthusiast, Joel Sietsema joined Sound United in 2013 as the Director of New Business Development where he led new initiatives in brand and product development and consumer insights. Since then, Joel has held various roles at Sound United, including the Director of Brand Management for Definitive Technology.

Prior to joining Sound United, Joel held a variety of merchandising roles at Best Buy Co. and Magnolia (2005-2013), most recently as the Senior Merchant for audio categories. Sietsema holds a BA in Psychology and Spanish from the University of Michigan, and a Masters of Business Administration from the University of Minnesota.


First Album

Nirvana – Unplugged In New York

First Concert


Favorite Album

Bob Marley - Legend

Brendon Stead

Senior Vice President, Product Development

Brendon has spent his career delighting consumers by delivering world class audio visual product in Product Management & Development roles.

Over this time, Brendon has launched JBL, Harman Kardon, Infinity, Mark Levinson, Altec Lansing, Denon, Marantz and HEOS branded products that include floor standing speakers, powered speakers, embedded audio, Audio Video Receivers, Bluetooth speakers, Headphones, DVD & Blu-ray players, Wireless Multi-room players, and media servers.

Brendon joined Sound United as part of the acquisition of D+M and has a BS Physics for the University of California, Santa Barbara.


First Album

Graceland, Paul Simon

First Concert

U2 Joshua Tree Tour LA Coliseum

Favorite Album

Legend, Bob Marley

Andrew Stevens

Senior Vice President, Human Resources

Andrew Stevens is SVP of Global Human Resources.

Andrew joined the company in 2019 and comes with 20 years of strong business experience in both Human Resources and Corporate Finance. In his most recent role with NuVasive, a global medical device company, Andrew had worldwide responsibility for talent management, talent acquisition, corporate culture initiatives, acquisition integrations, and HR operations for key business units of their organization. Andrew holds a Bachelor of Arts in Finance from Michigan State University.

Andrew Stevens, HR

First Album

Graceland by Paul Simon

First Concert


Favorite Album

At Folsom Prison by Johnny Cash