Contact Info

The Upgrade Company

+1 269-352-7609

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 (6) of David J. Schulte's patents




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The Upgrade Company, AudioVisual Equipment  Dealers, Harbor Springs, MI 











Contact Info

The Upgrade Company

+1 269-352-7609

This email address is being protected from spambots. You need JavaScript enabled to view it.

 (5) of David J. Schulte's patents



+ 30 Day In Home 100% Refund Period

+ 5 Year Parts & Labor Warranty with Every Signature Edition Upgrade

+ 100% GUARANTEED to beat ANYTHING else on the market!


Nothing we sell ever comes back.  

We don't even have to advertise.  Once our clients experience for themselves the extreme high performance & "bang for the buck" we deliver, they keep coming back as funds permit.  

The Upgrade Company would not continue to be A+ rated on the nationwide BBB algorithm month after month unless we were delivering on our promises.

Please call +1 269-352-7609 to place order

Furman Testimonials

Unsolicited Customer Testimonials - Every client has paid The Upgrade Company LLC in full.   No kickbacks, no commissions, no fees of any kind for recommending our products and services.

Furman Elite 20PFi Power Conditioner with Signature Edition upgrade & Bybee Purifiers

I didn’t want to believe that getting a power strip—well, as it turns out the Furman Elite 20PFi is a hell of a lot more than a power strip—could make a difference in the quality of my listening pleasure—but it did and it did big time. Highs were sweeter, lows deeper and more resonant and the overall experience of having a top quality, filtered power source created a sound experience that made my previous power conditioner sound dull, dingy and uninspired. I’m not very audiophile when it comes to adjectives, but I do know good sound. I love live music and listen to it often. I have a top quality system largely developed for me by The Upgrade Company after struggling for years with store bought products--good ones but largely off the shelf without the technology and care that The Upgrade Company gives to each and everyone of its upgraded products.

When David Schulte told me about the Furman I didn’t want to believe him. What could a power strip add to my B&W 802 Nautilus speakers, my SE upgraded Onkyo processor, my SE upgraded Oppo 105 and my ATI 300 watt per channel amp. Frankly, I didn’t want to spend the extra bucks on the SE upgraded Furman, but am I glad I did.

By providing the purest power with the least interference, electronically reproduced music takes a quantum leap in sound quality. If you can afford it, buy it. If you can’t, save for it. But make sure that eventually you add one to your system. David also talked me into the Bybee option. Frankly, I haven’t the vaguest idea what these are except that they cost very little by comparison to everything else I’ve spent money on and once a part of your system, it too improves sound quality. Its another noise filter and therefore another step in creating electronically reproduced music that imitates live music.

I attend a lot of concerts and musical performances. Electronically reproduced music generally does not give you the live sound and the live experience. The wizardry and magic of The Upgrade Company, however, will get you as close as you can come to the real McCoy. If you don’t believe me, try something out. Upgrade Co. has a generous return policy. Try the Furman or Oppo perhaps first.

Dr. Alfred Balitzer, CA

Oppo 105 SE upgraded, Furman Elite 15PFi Power Conditioner w/SE upgrades, TimePortal Reference Power Cords

Here is a testimonial for The Upgrade Company website on the purchases I've made so far for my system.

I started out by upgrading the source first per Upgrade's recommendation:

A brand new SE upgraded Oppo BDP-105. Against a stock Oppo BDP-105 which had quite a bit of burn in time, the SE 105 was night and day superior using any adjective you want. With burn-in period completed, the Signature Edition upgrade firmly puts Oppo's into that rarified fine analog LP playback dimension throwing a huge lush airy liquid simply surreal sound stage with brilliant highs and big, bold, huge dynamics, full bodied yet fast & tuneful bass response, simply crystal clear & musical, even on my worst discs like the old Beatles. The comparison to the stock 105 is positively stunning. On the video side, I played a couple of music videos which I know well to A-B compare the stock & SE upgraded 105's. I was impressed with the greatly (not just slightly) improved color saturation, lack of grain and haze, improved detail and resolution of the RFI/EMI shielded 105. The stock player looks washed out in comparison and grainy. Your SE upgrade is a much bigger bang for the buck over buying a far expensive player or even new speakers. Speakers can only reproduce what the source is giving it, right?

Because the 105 SE purchase blew away my expectations, and hearing what your SE upgrades did for my brother Rob's system, I went ahead and ordered TimePortal Reference power cords and your SE upgraded Furman Elite 15PFi power line conditioner which are unbelievable. The RFI/EMI riddance technology in the TimePortal power cord and Furman conditioner more then doubled the performance.

Both the sound and the picture were dramatically improved. Even my power amp sounds a lot better through the SE upgraded Furman.

An audiophile friend of mine is very critical of digital and listens only to vinyl. He didn't like my system at all prior to the SE upgrade to the 105, TimePortal power cords and SE upgraded Furman power conditioner. He really surprised me when he said the sound is now comparable to a really expensive system with the warmth and clarity of a great turntable without the usual clicks and pops. He was genuinely impressed and wondered how you pull this off. I directed him to Upgrade's website to learn more.

Put me down for an 8' pr of TimePortal RFI/EMI shielded speaker cables. I'll send you my NAIM preamp and amp in a couple months. My brother could not believe the improvement your cable rebuild SE upgrades made to his older TimePortal power cords, TimePortal interconnects and TimePortal speaker cables. That RFI EMI stuff is well worth $99 @ foot to install on cables. I'm sold after hearing the before and after in his system. It's a 1,000 times better with all the SE upgrades to his entire system.

Thanks a bunch!

Rick Gallos, Canada

Page information last updated: 20/04/2017

Disclaimer: We believe but do not guarantee that the information on this website is correct at the time of publication.

Our Clients Say...


April 2018

Paul, CA

March 2018

David Berger, CA
Marc A., Illinois

February 2018




David Berger, CA

January 2018


December 2017

Dr John Read, Saudi Arabia
Phil Ho, Sacramento, CA

November 2017

Ronald S Stroud, M.D.
Don Fleming, North Carolina

October 2017

Dave Allison, Texas

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Ron D, Illinois

August 2017

Doc John

July 2017

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May 2017


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Phil Ho, California

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Fred Laury

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Erick Perry

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Rob Gallos

June 2016

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February 2016

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December 2015

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Jim Wojno

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June 2015

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Gary L. Peeke, Chicago

May 2015

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Ben Hayes, Australia

April 2015

Tom Drummond

March 2015

Tom Mathews, Georgia
Tom Mathews, Georgia
Tom Mathews, Georgia

February 2015

Mike R, FL

January 2015

Jim Wojno
Dr. Alfred Balitzer, CA
Sam G, NY
Joe Westerman, Ohio

December 2014

Chris Huggins, Canada

November 2014

Brian Breslin, Canada
Alfredo Piñeyro-Garza

October 2014

Richard Gunther
Yasuo, Japan

September 2014

Dave Dalton, Indiana
Dave Dalton, Indiana
Dave Dalton, Indiana
Rick Gallos, Canada
Rick Gallos, Canada

August 2014

Jean-Michel, Canada

July 2014

Rob Gallos, Canada

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