Contact Info

The Upgrade Company

Customer support and communication is an issue taken very seriously by The Upgrade Company. We strive to exceed your expectations. 
Please drop us an email or voicemail today.  We promise to reply to your inquiry as fast as possible.
Contact Information
Office Hours: Monday-Friday 10am-6pm, PST


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

+1 702 708-4378

 (6) of David J. Schulte's patents




Payments & Shipping










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











Contact Info

The Upgrade Company

Customer support and communication is an issue taken very seriously by The Upgrade Company. We strive to exceed your expectations. 
Please drop us an email or voicemail today.  We promise to reply to your inquiry as fast as possible.
Contact Information
Office Hours: Monday-Friday 10am-6pm, PST


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

+1 702 708-4378

 (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 Email Us on This email address is being protected from spambots. You need JavaScript enabled to view it.  to place order

PS Audio Testimonials

PS Audio NuWave DSD DAC Signature Edition Upgrade
Hi Dave,
My PS Audio NuWave DSD DAC SE upgrade is another great success after the Marantz player SE upgrade turned out so well.  I have been using this Dac non stop in a high-end computer headphone system ever since it was SE upgraded. I really like the feature that this Dac can automatically analyze the incoming signal and play it in native resolution for optimal sound, the XMOS software for USB windows driver is rock solid, and your work has given the Dac added purity of tone black background extra fine detail resolution all with a more beautiful natural sound......I love this Dac it's perfect for my needs!
Thanks again, 
Sam Disney


TimePortal and PS Audio Upgrades

I have been engaged with HIFI  since my mid-teens (some 30 years now). I started with a used Nad amplifier and Rega turntable. From that day to now I have been searching for cost effective ways to achieve a sound which I’m happy with.
It’s been a long journey I’m there now thanks to The Upgrade Company.

My current system is PS audio DirectStream DAC & PerfectWave Transport each with The Upgrade Co SE Upgrades, and a Sanders ESL power amp that has been SE Upgraded by Upgrade Co as well.

My speakers are Magnepan 3.6.
I modified the speakers some time ago via Peter Gunn, he added a wooden frame and new crossover using premium capacitors. I later further upgraded many of the components and changed the crossover values to suit my room and music taste better.  This transformed the speaker, in stock form it was OK, it is now as good as any speakers I've heard at any price.

I was still not happy with the overall sound, there was a persistent treble ringing,  the presentation was on the lean side and in complex music the presentation was washed out into a wall of sound rather than layers of space and articulation. I also knew that purchasing a higher spec/cost front end DAC and transport would be out of the question due to the excessive cost at this level.

I found The Upgrade Company on the web, and spent some time reading through the reviews. I was impressed with David’s commitment to audio improvement and his guarantee. I did also look on the web and was surprised by some of the negative responses by so called enthusiasts who clearly had not actually tried or ever listened to a single Upgrade Co upgraded product, a sad state of affairs for them.

I sent the PS Audio DAC and transport off to Upgrade Co. 
They both returned 10 days later. I could tell immediately that there was an improvement. After 200 hours or so I can say I was impressed. It still sounded like the PS Audio product I knew, but it is now presented with a much wider and deeper sound stage, most of the treble electronic hash was gone at 200hrs, there was far more micro and macro dynamics but most importantly it was far more musical. Every CD sounded much better from poorly recorded 90's digital to the best recorded live events.

David then recommended demagnetization discs and burn-in and their TimePortal RFI EMI RIDDED power and XLR interconnects and a TimePortal RFI EMI RIDDED digital for the PWT and Directstream.  I've invested significant money into cabling over the years and really only found them useful in changing aspects of the sound, not really a true audio improvement. David was adamant that TimePortal Cables were different and offered a 30 day free trial. After 3 weeks of burn in I purchased them. The improvement was greater than the PS Audio SE Upgrades.  David informed me that actually TimePortal Cables simply had facilitated the full capability of the PS Audio front end. They released a bottleneck so to speak which allowed the PS Audio Upgrade transformation to be realized rather then get recontaminated with airborne RFI & EMI.  TimePortal power cords also got rid of a lot of RFI & EMI before it reached the PS Audio's which further greatly improved their performance.

I later had Upgrade Co. do my Sanders power amp and again added a TimePortal power cable. This took longer to shine, maybe 300-400 hours on new parts and wiring before the music really sang.

Gone now is all digital noise and electronic haze:  the actual presentation is now truly three dimensional, musical and real sounding, bass is firm, articulated and balanced. It’s difficult and perhaps misleading to quantify the scale of overall improvement but I’m sure I would have to invest many many times the cost of my current equipment to reach this level of performance.

I’m now upgrading a Ming Da 2A3 tube preamp.

While the service and products that The Upgrade Company supplies cannot be described as cheap, I can describe it as a fantastic value. The total cost of the upgrades described above would likely be no more than the cost of a single new amplifier or DAC.

The service was also quick, efficient and David’s advice was balanced and focused on my needs rather than his financial gain.

Many thanks to David and The Upgrade Company. I do find it odd that The Upgrade Company is not mentioned in any major print audio press, alas honesty and customer service is not a priority for most manufactures or editors out there.

Neil Riley
Houston, Texas


PS Audio Direct Stream DAC

This is a review of my Signature Edition Upgrades to my David Berning ZH-270 tubed integrated amp and my PS Audio DirectStream DAC.
During the SE Upgrade I had optional V-Caps installed in the ZH-270 and 3 copper Bybee slipstream quantum purifiers installed in the PS Audio DAC. 

So, let's get to the sound.Totally "Jaw Dropping".  Incredible. The upgrades were not subtle. The first thing that hit me was the totally effortless presentation.  I have never heard this out of any stock gear.  My system exudes so much more energy and power and musicality.
Music just floats out of my speakers.
The Upgrade Company's technology also greatly increased dynamics, clarity, imaging and my system now spreads a gorgeous soundstage that makes you feel like you are in the recording studio. This is where I can use the word "organic" because the sound is now so natural. I streamed "Bridge over troubled waters" and Art Garfunkel's vocals were incredibly real sounding, I literally felt like Art was in my listening room.

My main mission in doing these upgrades was to try to achieve a digital set-up that sounded like my vinyl. Mission accomplished and I'm now selling my complete record collection(1600 records). I just sent more equipment for Upgrade Co. to upgrade.  
Last but not least, David (The Upgrade Company's CEO) is awesome to work with. David can provide excellent insight into the project if you ask and make recommendations based upon your budget. David is one of the good guys in this industry.  David saved me tens of thousands of dollars I would've spent on stock gear and I totally doubt ANY stock gear could sound like this.  My suggestion is, don't over analyze. You've got a full 30 days to get all of your money back. 

Send in your gear, I promise, you will not be disappointed.
Gary L. Peeke
Chicago, ILL
This email address is being protected from spambots. You need JavaScript enabled to view it.

PS Audio DirectStream DAC Signature Edition Upgrade

I had my PS Audio DirectStream DAC SE upgraded by The Upgrade Company after real positive results with their SE upgrades of my Marantz Reference SC-7S1 preamp and Oppo player. The SE upgrade totally transformed the sound of the DirectStream DAC. It removes all traces of electronic glare and veiling, creating a sound that is supremely musical, spacious, and most importantly, filled with accurate but rich tonal and timbral accuracy. Big difference!

Sam G.

Flushing, NY


PS Audio PWD MKII Signature Edition Upgrade


I received my PS Audio PWD MKII back safely. Thanks for the quick turn around.

The unit sounds great now with your SE upgrade in it!

Keep up the excellent work.

Best, Daniel Hill

PS AUDIO PWD Mkll Signature Edition upgrade

Hi David,

I received my Signature Edition upgraded PS AUDIO PWD Mkll back last Wednesday.

The first thing I noticed is the sound stage grew leaps and bounds. The sound is so much wider and bigger than before. I had to rearrange the toe in on my speakers and move my couch further back to accommodate the massive growth in sound stage. Instruments now sound life-sized and have a lot more kick & dynamics to them, drums and guitars especially. Singers and instruments are now much more bold and powerful.
Bass is now much deeper and faster, with greater heft and slam, yet with added control and tightness.
Mids and highs are now more much detailed, without any touch of harshness or veiling.

The Upgrade Company's Signature Edition upgrade is definitely a big step up over the stock PWD MKll which in comparison sounds laid back soft veiled & gritty. The stock PWD MKll really does have a flatter weaker presentation. The differences are big, I'm quite surprised.

I am very glad with my purchase, It was worth every penny.

Kay, NYC

PS Audio PWDMKII & PW Transport
My PS Audio PerfctWave DAC Mark ll and PerfectWave Transport units finally sound like I hoped they would when I bought them!  There is a quality to the sound that was not there before and the upgrades are not even broken in.
I'll be listening to my CD collection a lot more now.
Thanks for a great job in upgrading them!
Neal, TN
Great article on Upgrade Co. in the November 2012 issue of Positive Feedback Online.  As you know I have the PS Audio PerfectWave Transport & DAC Mark ll units, an OPPO 95 and Marantz AV-8003 all upgraded by you.  I will only listen to music through units you have upgraded from now on.  When friends come over and I crank up my system they are amazed at how good it sounds.  I then explain to them about the upgrades you did.  I always hear comments about how they have never heard a system sound this good.
Thanks again,

Page information last updated: 06/05/2020

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

Our Clients Say...

November 2021

Norman Taylor

October 2021

Eddie Silva, Australia
Chip Stern, NYC

April 2021

Dr. John M. Read

March 2021

Jeff Goldberg, MI

October 2020


September 2020

AS in Delaware


Dr. Ronald Stroud MD, Alabama

July 2020

Seth Shabo

June 2020

Sahr Abu, Wilmington, DE

May 2020

Dr. John M. Read

April 2020


March 2020

Kurt S, CA

February 2020

Dr. Ron Stroud MD, Alabama

January 2020

Jay English, ILL

December 2019

Dennis Binda, Netherlands

November 2019

Dr. Ronald Stroud MD, Alabama

October 2019

Dr John Read
Jim Wojno
Jim Wojno
Jack Paris

September 2019

Rick Frye

August 2019

Dennis Binda
Dr. John M. Read

July 2019

Dr. Ron Stroud MD
Seth S.

May 2019

Dr John Read
Bob Lanser
Jay English, Illinois

April 2019

Sahr Abu, Wilmington, DE
Robert Kemper, Miami, Florida

March 2019

Dave Allison

February 2019

Ken Volk, AZ

January 2019

Rick Gallos, Canada

December 2018

Brian Breslin

November 2018

Dave Allison

September 2018

Don K, VA

July 2018

Seth S.

June 2018

Warren "happy ears" Hingst

May 2018

Rick Gallos, Winnepeg Canada

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

September 2017

Ron D, Illinois

August 2017

Doc John

July 2017

Sam Disney

June 2017

Don Kaplan, Virginia

May 2017


April 2017

Phil Ho, California

March 2017

Tom Drummond

February 2017

Phil Ho, California

January 2017

Paul E. Minnesota
Seth S.

December 2016

Chip Stern

November 2016

Dr John Read, Riyadh, Saudi Arabia

October 2016

Rich H, Colorado

September 2016

Fred Laury
Fred Laury

August 2016

Erick Perry
Erick Perry

July 2016

Rob Gallos

June 2016

Chris Sanabria PhD, Texas

May 2016

David Donohue, PA

March 2016

Pete Stumberg

February 2016

Manuel Ortiz

January 2016

Brent Brisco, Canada

December 2015

Jim Wojno
Jim Wojno

The Upgrade Company LLC © ®™

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

Tel: +1 702 708-4378